WO2018143614A1 - 캐비티 필터 - Google Patents
캐비티 필터 Download PDFInfo
- Publication number
- WO2018143614A1 WO2018143614A1 PCT/KR2018/001180 KR2018001180W WO2018143614A1 WO 2018143614 A1 WO2018143614 A1 WO 2018143614A1 KR 2018001180 W KR2018001180 W KR 2018001180W WO 2018143614 A1 WO2018143614 A1 WO 2018143614A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pin
- cavity filter
- insertion hole
- elastic connector
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/646—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00 specially adapted for high-frequency, e.g. structures providing an impedance match or phase match
- H01R13/6473—Impedance matching
- H01R13/6474—Impedance matching by variation of conductive properties, e.g. by dimension variations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
- H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
- H01R12/71—Coupling devices for rigid printing circuits or like structures
- H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
- H01R12/714—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit with contacts abutting directly the printed circuit; Button contacts therefore provided on the printed circuit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
- H01R12/71—Coupling devices for rigid printing circuits or like structures
- H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
- H01R12/73—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures connecting to other rigid printed circuits or like structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/02—Connectors or connections adapted for particular applications for antennas
Definitions
- the present invention relates to a cavity filter. More specifically, the present invention relates to a cavity filter for a massive MIMO antenna in which the connector fastening structure between the filter and the printed circuit board is improved in consideration of assembly and size.
- MIMO Multiple Input Multiple Output
- the transmitter transmits different data through each transmit antenna, and the receiver transmits different data through appropriate signal processing. Spatial multiplexing technique to distinguish. Therefore, as the number of transmit / receive antennas is increased at the same time, the channel capacity increases to allow more data to be transmitted. For example, if you increase the number of antennas to 10, you get about 10 times the channel capacity using the same frequency band compared to the current single antenna system.
- 4G LTE-advanced uses up to 8 antennas.
- products with 64 or 128 antennas are being developed in the pre-5G phase, and base station equipment with a much larger number of antennas is expected to be used in 5G.
- This is called Massive MIMO technology.
- current cell operation is 2-Dimension
- 3D-Beamforming is possible when Massive MIMO technology is introduced, so Massive MIMO technology is also called FD-MIMO (Full Dimension).
- the RF filter having a cavity structure has a resonator composed of a resonator rod which is a conductor inside a box structure formed of a metallic conductor, so that only an electromagnetic field having a natural frequency exists so that only a characteristic frequency of ultra high frequency passes by resonance.
- the bandpass filter of the cavity structure has a low insertion loss and is advantageous for high power, and thus is widely used as a filter of a mobile communication base station antenna.
- the present invention has a main purpose to provide a cavity filter having a slimmer and more compact structure and the RF connector is built in the thickness direction in the body.
- an object of the present invention is to provide an assembly method that can minimize the accumulation amount of the assembly tolerance occurring when assembling a plurality of filters and an RF signal connection structure that is easy to mount and maintains the frequency characteristics of the filter uniformly. have.
- the cavity filter used in the base station antenna for mobile communication according to an embodiment of the present invention and installed on the outer member, the resonance element; A first case disposed on the outer member and including a resonance element therein; And a terminal portion electrically connected to the electrode pad of the outer member and the resonating element through the first case, wherein the terminal portion is electrically insulated from the first case, wherein the terminal portion is at least a portion of the first case from the bottom surface of the first case.
- Recessed terminal insertion hole A pin member disposed inside the terminal insertion hole, the pin member including one end of which is connected to the resonating element and a terminal body portion extending from the other end of the pin portion and having a larger diameter than the pin portion; And an elastic conductor, disposed between the terminal body portion and the electrode pad between the terminal body portion and the electrode pad to electrically connect both sides, and when the cavity filter is installed on the outer member, the pin member and the electrode pad are compressed. And an elastic connector configured to provide contact pressure thereto.
- the terminal insert may further include a dielectric bush inserted into the terminal insert, the terminal insert including: a third insert having a terminal gap and a constant air gap in the radial direction; A second insertion hole having a diameter smaller than the third insertion hole and into which a portion of the dielectric bush is inserted; And a first insertion hole having a smaller diameter than the second insertion hole and into which a portion of the dielectric bush is inserted.
- the dielectric bush is in the form of a two-stage cylinder having a first end and a second end having a larger diameter than the first end, and a through hole penetrating the center of the rotation shaft is formed, and a pin part is inserted into the through hole from the second end side, so that the dielectric bush is formed.
- the pin member is fixed to.
- the pin portion is characterized in that it comprises a wedge-shaped projection formed on the outer circumferential surface so that the pin portion does not fall in the opposite direction inserted into the dielectric bush.
- the terminal body portion is formed shorter than the depth of the third insertion opening, the hollow portion having a cylindrical shape therein; And a cone-shaped opening having a diameter decreasing inward from the inlet.
- the hollow portion is characterized in that it comprises a first annular groove formed on the inner peripheral surface of the hollow portion.
- the elastic connector of the cavity filter the cylindrical member is inserted into the hollow portion; A wedge-shaped annular protrusion protruding from the outer circumferential surface of the cylindrical member; A conical pin-socket contact portion extending from the cylindrical member and inserted into the opening; An impedance matching portion extending from the pinsocket contact portion; And at least one incision formed along the central axis of the elastic connector from an outer surface exposed to the outside after the elastic connector is inserted into the hollow portion, wherein the incision extends to a depth passing through the annular projection, and the annular projection is elastic.
- the connector is inserted into the hollow portion is accommodated in the annular groove is characterized in that the size is formed to prevent the departure of the elastic connector.
- the angle size from the central axis of the pin-socket contact portion is characterized in that formed 5 to 10 degrees larger than the angle size from the central axis of the opening.
- the electrode corner formed by the outer surface of the elastic connector and the outer peripheral surface of the impedance matching unit is characterized in that it is formed in a round shape in the range of R0.1 to R0.5.
- the elastic connector is formed from an elongated spring plate material having a predetermined width of most of the length except for the both ends, the finished form is a circular spring portion formed in a circular shape in the center; And two plate-like protrusions projecting perpendicularly to the circumference from two adjacent points on the circumference of the circular spring portion, wherein the width of the spring plate is smaller than the diameter of the hollow portion, and the diameter of the circular spring portion is larger than the diameter of the terminal body portion.
- the opening is characterized in that the circular spring portion is formed at an angle that can be circumscribed.
- solder is filled between the hollow portion and the plate-shaped protrusion inserted into the hollow portion, characterized in that the electrical connector and the pin member electrically and mechanically connected.
- the terminal insertion port of the elastic connector is formed from the bottom surface of the first case, the large diameter of the two-stage cylinder shape of the dielectric bush and A fourth insertion hole having a diameter of the same length and extending in parallel to the lower surface thereof; And a fifth insertion hole formed at a central position of one side of the fourth insertion hole and into which the first end of the dielectric bush is inserted.
- the elastic connector is a pin insertion hole is formed so that the pin portion is inserted and supported by the terminal body portion; A first extension part extending in a direction perpendicular to the central axis of the pin part; And a second extension portion that is bent to have an obtuse angle from the first extension portion and extends to protrude outward from the bottom surface of the first case.
- the terminal body portion is characterized in that the outer surface of the terminal body portion is formed to have a predetermined gap from the bottom surface of the first case in the state in which the elastic connector is inserted into the pin portion through the pin insertion hole and the pin member is assembled to the dielectric bush. .
- the cavity filter used in the base station antenna for mobile communication further includes a star washer electrically connected to the first case, and the first case surrounds the third insertion opening. Further comprising a second annular groove, the second annular groove is characterized in that it is formed to accommodate the star washer and at least a portion of the star washer protrudes out the bottom surface of the first case.
- the second annular groove is formed in an annular dovetail shape so that the diameter of the circumferential surface corresponding to the outer diameter increases in the depth direction, and the inlet outer diameter of the second annular groove is formed by retracting the star washer by elasticity. It is inserted into the bicyclic groove, characterized in that formed to a minimum diameter that can be prevented from leaving.
- the second annular groove may further include a plurality of press-fit pin holes formed around the second annular groove; And a press-fit pin which is inserted into the press-fit pin hole and is inserted into the bottom surface of the first case and at least partially protrudes into the second annular groove to prevent the detachment of the star washer. .
- the second annular groove includes a caulking hole formed around the second annular groove in proximity to the second annular groove, and has a circumferential surface corresponding to the outer diameter of the second annular groove by caulking after the star washer is inserted.
- the side wall of the recessed toward the central axis of the second annular groove is characterized in that configured to prevent the departure of the star washer.
- the present invention can reduce the size of the antenna system by providing a cavity filter having a slim and compact structure in which the RF connector including the elastic connector in the thickness direction in the body, and can quickly and efficiently verify the verification of the individual cavity filter It can be carried out, it is possible to easily mount a plurality of cavity filters inside the mobile communication base station antenna.
- FIG. 1 is a diagram illustrating a laminated structure of an exemplary massive MIMO antenna.
- FIG. 2 is a cross-sectional view illustrating a state in which a cavity filter is stacked between an antenna board and a control board according to an embodiment of the present invention.
- Figure 3 is a plan perspective view of the structure of the cavity filter according to an embodiment of the present invention as viewed from the bottom side.
- FIG. 4 is a cross-sectional view illustrating a terminal part structure of a cavity filter employing a push pin type elastic connector according to an exemplary embodiment of the present invention.
- Figure 5 is a side cross-sectional view showing the terminal structure of the cavity filter employing a push pin type elastic connector according to an embodiment of the present invention.
- FIG. 6 is a partial cross-sectional view of a terminal portion structure of a cavity filter employing a push ring type elastic connector according to an embodiment of the present invention.
- FIG. 7 is a cross-sectional view showing an assembly process of a pin assembly employing a push ring type elastic connector according to an embodiment of the present invention.
- FIG. 8 is a plan view and a partial cross-sectional view showing a pin assembly employing a push ring type elastic connector according to an embodiment of the present invention.
- FIG. 9 is a conceptual diagram illustrating a manufacturing method of an elastic connector of a push ring method according to an embodiment of the present invention.
- 11 is an electric field analysis result of the terminal portion of the general plunger system of FIG. 10.
- FIG. 12 is an analysis model of a terminal unit employing a push pin type elastic connector according to an exemplary embodiment of the present invention.
- 13 is an electric field analysis result of the terminal unit employing the push pin type elastic connector according to an embodiment of the present invention.
- FIG. 14 is an analysis model of a terminal unit employing a push ring type elastic connector according to an exemplary embodiment of the present invention.
- 15 is an electric field analysis result of a terminal unit employing an elastic connector of a push ring method according to an embodiment of the present invention.
- FIG. 16 is a graph illustrating comparison results of insertion loss analysis of the contact RF terminal units disclosed in FIGS. 10, 12, and 14.
- FIG. 17 is a graph illustrating comparison of reflection loss analysis results of the contact RF terminal units disclosed in FIGS. 10, 12, and 14.
- FIG. 18 is a conceptual diagram illustrating a terminal part structure of a cavity filter employing a leaf spring type elastic connector according to an embodiment of the present invention.
- 19 is a cross-sectional view illustrating a state in which a cavity filter is attached to a socket of a rear surface of an antenna board according to an embodiment of the present invention.
- FIG. 20 is a cross-sectional view illustrating a state in which a cavity filter is attached to a rear surface of an antenna board according to an embodiment of the present invention.
- 21 is a plan view illustrating a test board of a cavity filter according to an exemplary embodiment of the present invention.
- FIG. 22 is a cross-sectional view illustrating a test board of a cavity filter according to an exemplary embodiment of the present invention.
- FIG. 23 is a plan view illustrating a test board of a cavity filter according to an exemplary embodiment of the present invention, in which a star washer disposed around an elastic connector is omitted.
- FIG. 24 is a cross-sectional view of FIG. 23 illustrating a test board of a cavity filter according to an embodiment of the present disclosure.
- FIG. 25 is a plan view illustrating a test board of a cavity filter including a leaf spring type elastic connector according to an exemplary embodiment of the present invention.
- FIG. 26 is a cross-sectional view of FIG. 25 illustrating a test board of a cavity filter employing a leaf spring type elastic connector according to an embodiment of the present invention.
- FIG. 27 is a conceptual diagram illustrating a star washer according to an embodiment of the present invention.
- FIG. 28 is a conceptual view illustrating a process of forming a second annular groove having a dovetail shape accommodating a star washer according to an embodiment of the present invention.
- FIG. 29 is a conceptual view illustrating a second annular recess accommodating a star washer and a press-fit pin for preventing separation of the star washer according to an embodiment of the present invention.
- FIG. 30 is a conceptual view illustrating a caulking process for preventing the separation of the second annular groove and the star washer containing the star washer according to an embodiment of the present invention.
- FIG. 1 is a diagram illustrating a laminated structure of an exemplary massive MIMO antenna.
- the antenna device 10 includes a housing in which a heat sink 110 is formed, and a radome 170 coupled to the housing. An antenna assembly is embedded between the housing and the radome 170.
- a power supply unit (PSU) 120 is coupled to the bottom of the housing, for example, via a docking structure, and the power supply unit 120 is an operating power source for operating electronic components provided in the antenna assembly. To provide.
- the antenna assembly has a cavity filter (cavity filter, 18) is arranged on the back of the antenna board 150 in which a plurality of antennas 160 are arranged on the front, the number of antennas 160, the associated PCB board 130 is followed It has a laminated structure.
- the cavity filter 140 is tuned and verified in detail so as to have frequency characteristics that meet the specifications individually before mounting. It is desirable that the tuning and verification process be done quickly in an environment with the same characteristics as the mounted state.
- FIG. 2 is a cross-sectional view illustrating a state in which a cavity filter is stacked between an antenna board and a control board according to an embodiment of the present invention.
- the conventional RF connector 142 is excluded, thereby facilitating the connection and providing an antenna structure 11 having a lower height profile.
- the RF connection is provided on both sides of the height direction, by connecting the elastic connector (240, 340, 440), even if vibration and thermal deformation occurs in the antenna board 150 or PCB board 130, RF connection is maintained the same. There is an advantage that there is no change in frequency characteristics.
- Figure 3 is a plan perspective view of the structure of the cavity filter according to an embodiment of the present invention as viewed from the bottom side.
- FIG. 4 is a cross-sectional view illustrating a terminal part structure of a cavity filter employing a push pin type elastic connector according to an exemplary embodiment of the present invention.
- the internal structure including the resonant element is omitted.
- the cavity filter 18 includes a first case 180 and a first case 180 including a resonance element (not shown) and having a hollow inside.
- the terminal part 20 provided in the height direction of the cavity filter 18 and the assembly holes 182 provided on both sides of the terminal part 20 are disposed on both sides of the second case 181 and the first case 180 in the longitudinal direction. Include.
- the terminal unit 20 penetrates through the first case 180 to electrically connect the electrode pad of the external member, for example, the PCB board 130 or the antenna board 150, to the resonance element.
- Both assembling parts 184 including the terminal part 20 of the first case 180 and the second case 181 may have a structure formed thicker than the bottom surface 186 which is an area therebetween depending on the application. have.
- both assembly units 184 may interfere with the element on which the first case 180 is mounted. It can have a thickness that can be avoided.
- the external terminal of the terminal unit 20 may be formed such that one side thereof faces the lower surface 188 of the first case 180 and the other side thereof protrudes from the assembly reference surface of the second case 181. According to the mounting form of the cavity filter 18, the external terminal of the terminal unit 20 may be formed to be exposed to the lower surface 188 of the first case 180 in the same direction.
- Figure 5 is a side cross-sectional view showing the terminal structure of the cavity filter employing a push pin type elastic connector according to an embodiment of the present invention.
- the terminal portion 20 of the cavity filter 18 may include a terminal insertion hole 210, a dielectric bush 220, a pin member 230, an elastic connector 240, and a pin spring 250. ) And star washer (260).
- the terminal insertion hole 210 has a cylindrical shape and is formed from the bottom surface 188 of the first case 180 to pass through the first case 180, or is formed from the top surface of the first case 180. It may be provided through one case 180.
- a through hole is formed in the second case 181, and the depth of the terminal insertion hole 210 may be adjusted in consideration of this.
- the terminal insertion hole 210 is formed in three stages to decrease the diameter in stages. The portion having the smallest diameter in the terminal insertion hole 210 is defined as the first insertion hole 212, the portion having the next diameter is the second insertion hole 214, and the portion having the largest diameter is the third insertion hole 216. do.
- Dielectric bush 220 is in the form of a two-stage cylinder.
- the dielectric bush 220 has a through hole 226 penetrating the center of the rotation shaft.
- the dielectric bush 220 is inserted into and fixed to the first insertion hole 212 and the second insertion hole 214.
- the dielectric bush 220 may be made of Teflon material.
- one body is configured in the form of a two-stage cylinder, but is not limited thereto, and may be assembled to have a two-stage cylinder form with different diameters.
- the pin member 230 is in the form of a two-stage cylinder in which the pin portion 232 and the terminal body portion 234 are integrally formed in the longitudinal direction.
- the socket body 236 is formed in the terminal body 234.
- the fin member 230 may be gold plated on a BeCu (Beryllium Copper) material.
- the pin portion 232 is inserted into and fixed to the through hole 226 of the dielectric bush 220.
- the outer circumferential surface of the pin portion 232 is formed with a wedge-shaped protrusion 235 so that the pin portion 232 does not fall in the opposite direction in which the pin portion 232 is inserted.
- the annular stepped portion formed at the boundary between the pin portion 232 and the terminal body portion 234 is assembled to abut one side of the dielectric bush 220.
- the terminal body part 234 is formed to be shorter than the depth of the third insertion hole 216, and a hollow socket part 236 is formed therein.
- the terminal body portion 234 is formed with a cone-shaped opening 238 that decreases in diameter from the inlet.
- the inner wall of the terminal body portion 234 in the region where the cone-shaped opening 238 is formed is inclined at an angle of 30 degrees with respect to the central axis, for example.
- the first annular groove 237 is formed inside the opening 238 having a cone shape, and the separation of the elastic connector 240 inserted therein can be prevented.
- a spring 250 may be inserted between the innermost inner surface of the opening 238 and the tip of the insertion portion of the elastic connector 240 to further provide a force for pushing the elastic connector 240 out of the opening 238. .
- the elastic connector 240 extends from the pinned contact portion 244 and the pinned socket contact portion 244 of the cylindrical structure inserted into the socket portion 236, the truncated cone shape inserted corresponding to the opening 238 of the cone shape.
- An impedance matching portion 246 is integrally formed in the longitudinal direction.
- the elastic connector 240 may be gold plated on the BeCu material.
- a wedge-shaped annular projection 242 protruding from the outer peripheral surface. The annular protrusion 242 is accommodated in the first annular groove 237 when the elastic connector 240 is inserted into the socket 236 to prevent the elastic connector 240 from being separated from the socket 236.
- the angle of the pin socket contact portion 244 is formed 5 degrees to 10 degrees larger than the angle of the cone-shaped opening portion 238 of the socket portion 236 with respect to the central axis.
- the elastic connector 240 is inserted into the socket portion 236, the cross-shaped cut portion 248 is formed locally along the central axis from the outer surface exposed to the outside.
- the depth of the incision 248 extends through the truncated cone shape to the cylindrical structure of the elastic connector 240.
- the cutout 248 is illustrated as a cross shape, but is not limited thereto.
- the cutout 248 may have a straight shape or a plurality of slots.
- the elastic connector 240 touches the cone-shaped opening 238 of the socket 236 in a state where the elastic connector 240 is inserted into the socket 236 so that the cross-shaped cutout 248 is not retracted. Protrudes from the bottom surface 188 of the first case 180, and has a length in which the elastic connector 240 is inserted while pressing the opening 238 of the socket portion 236 when the cavity filter 18 is mounted. Can be.
- the outer edge of the outer surface of the elastic connector 240 is an area electrically connected to the electrode pad formed on the PCB board 130 to which the cavity filter 18 is assembled while the elastic connector 240 is retracted.
- This outer edge is defined by the electrode edge 249.
- the electrode corner 249 is formed in a round shape in the range of R0.1 to R0.5, even if the elastic connector 240 is retracted to form a shallow cone shape in which the outer surface is concave in the plane. 249 is provided to have a uniform contact area with the electrode pad formed on the PCB board 130.
- the cavity filter 18 is actually assembled with the PCB board 130 and may have various height deviations. Even if the elastic connector 240 is retracted by forming the electrode edges 249 in a round shape, the cavity filter 18 may be uniform. It can have one contact area.
- the angle of the opening 238, the angle of the pin socket contact 244, the length of the elastic connector 240 and the round size of the electrode edge 249 may be defined by one side or the second case 181 of the first case 180. It is preferable to select based on when the assembly reference plane and the PCB board 130 are combined. In more detail, when the PCB board 130 is coupled, the elastic connector 240 is pushed up and slides along the opening 238 of the socket 236, and the cross-shaped cutout 248 is lifted up. When the cutout 248 is retracted, the angle of the pin socket contact portion 244 of the elastic connector 240 decreases, and the contact area between the opening 238 and the pin socket contact portion 244 changes.
- the elastic connector 240 As the outer surface of the elastic connector 240 is retracted in the form of a shallow cone, the area where the electrode edge 249 contacts the electrode pad of the PCB board 130 is also changed.
- the spring 250 inserted into the socket 236 pushes the elastic connector 240 toward the PCB board 130 and the force including the reaction force from the pin socket contact 244 acts on each contact. Each contact surface is elastically deformed.
- Design specifications of the socket portion 236, the elastic connector 240 and the spring 250 to determine the contact area is preferably selected in consideration of the impedance of the terminal portion (20). That is, it is preferable to determine the design specification that the change of the impedance along the signal path of the terminal portion 20 including the contact resistance determined by the contact area and the contact pressure is minimized.
- the signal quality may be deteriorated if the characteristic impedance of the signal line is not constant. Impedance mismatching of the signal path in multi-gigahertz signals can increase the voltage standing wave ratio (VSWR), which can degrade signal quality due to signal reflection and distortion.
- VSWR voltage standing wave ratio
- the third insertion hole 216 is spaced apart from the outer circumferential surface of the terminal body portion 234 with a predetermined air gap, and between the first and second insertion holes 212 and 214 and the pin portion 232, for example, Teflon.
- the dielectric bush 220 of the material is mediated.
- the pin part 232 and the terminal body part 234 of the pin member 230 have a stepped diameter, and the diameter and the depth of the second insertion hole 214 are considered in this regard, the pin member 230 and the terminal insertion hole 210. It is preferable to select so that the impedance of the liver remains constant.
- the dielectric constant of the Teflon material is about twice that of air.
- the diameter of the third insertion hole 216 is larger than that of the first and second insertion holes 212 and 214.
- the dielectric bush 220 is made of PEEK material having a dielectric constant about three times that of air, the diameter of the third insertion hole 216 is larger than that of Teflon.
- 5A to 5D illustrate the shapes of the electrode corners 249 and the impedance matching unit 246 of the elastic connector 240 in contact with the electrode pads of the PCB board 130 in various forms. These shapes and sizes can be selected by performing numerical analysis in consideration of the distance from the third insertion opening 216 or by evaluating the VSWR of the terminal unit 20 using, for example, a network analyzer.
- 5A illustrates an example in which the impedance matching part 246 protrudes vertically at a position away from the pin socket contact part 244, and the electrode edge 249 is an example in which a fine round of R0.1 is formed.
- 5B is an example in which the inclination angle of the pin socket contact portion 244 of the elastic connector 240 is maintained and extends to the electrode edge 249.
- 5C illustrates a case in which the impedance matching unit 246 is formed to have an inclined surface in which the diameter decreases again in a position deviating from the pin socket contact portion 244.
- FIG. 5D illustrates an example in which a diameter of the electrode edge 249 is relatively large rounded to R0.5, having an inclined surface that decreases again in diameter at a position away from the pin socket contact portion 244.
- 5E illustrates a case in which the spring 250 is omitted, a force (contact pressure) for pushing the electrode pad of the elastic connector 240 and the PCB board 130 in contact with the elastic connector 240 is cross-cut in the elastic connector 240. It is an example showing the case where the part 248 is formed by the reaction force from the pin-socket contact part 244 as it retracts.
- a second annular groove 270 may be formed outside the third insertion hole 216 to receive the star washer 260 that surrounds the signal line, surrounds the cylindrical portion, and is inserted to secure the ground connection.
- Figure 6 is a partial cross-sectional view of the terminal structure of the cavity filter employing a push ring type elastic connector according to an embodiment of the present invention.
- the terminal unit 20 includes a terminal insertion hole 210, a dielectric bush 320, a pin member 330, a push ring type elastic connector 340, and a star washer ( 260).
- the impedance matching is more strictly performed.
- the dielectric bush 220 is formed in a separate type, and the diameter of the through hole 226 of the dielectric bush 320 in two stages is different from each other.
- the pin portion 332 of the 330 is formed in two stages corresponding to the dielectric bush 320, the terminal insertion hole 210, the dielectric bush 320, the pin portion 332 and the star washer 260 are described above. It may be configured in the same form as the embodiment of FIG.
- the pin member 330 includes a terminal body portion 334 having a pin portion 332 and a socket portion 336.
- the pin member 330 may be gold plated on the BeCu material.
- the pin portion 332 is inserted into and fixed to the through hole 226 of the dielectric bush 320.
- the annular stepped portion formed at the boundary between the pin portion 332 and the terminal body portion 334 is assembled to abut one side of the dielectric bush 320.
- the terminal body portion 334 is formed shorter than the depth of the third insertion hole 216, the inside is hollow, and a cone-shaped opening 338 is formed to decrease in diameter from the inlet to the inside.
- the cone-shaped opening 338 is formed to be inclined at an angle of 60 degrees with respect to the central axis, for example, so that the circular spring portion 344 of the elastic connector 340 of the push ring type is circumscribed. Is formed.
- Elastic connector 340 of the push ring method is formed from a spring plate having a predetermined width of most of the length except for both ends.
- the elastic connector 340 includes a circular spring portion 344 and two plate-like protrusions 342 projecting perpendicularly to the circumference from two points 346 adjacent to the circumference of the circular spring portion 344 on one side.
- the width of the elastic connector 340 is formed so that the plate-like protrusion 342 can be inserted into the socket 336.
- the elastic connector 340 may be formed of a BeCu material and may be gold plated, and the two plate-shaped protrusions 342 may be spaced apart from each other, and the circular spring part 344 may be deformed into an ellipse when an external force acts in the center direction thereof. It is formed to act as a leaf spring.
- the two plate-like protrusions 342 of the elastic connector 340 are inserted into the socket portion 336, the two plate-like protrusions 342 are opened to each other so that the end portions of the two plate-like protrusions 342 are in close contact with the inner circumferential surface of the socket portion 336 to maintain the inserted state.
- the circular spring portion 344 is in close contact with the cone-shaped opening 338, the position opposite the plate-shaped protrusion 342 protrudes by a predetermined distance from the bottom surface 188 of the first case 180.
- the electrode pad When the cavity filter 18 is mounted, the electrode pad is elastically deformed in an ellipse shape as the electrode pad presses the circular spring part 344, and the pin member 330 and the electrode pad are electrically connected to each other, even when external vibration is applied. It serves to provide sufficient contact pressure to press the contact site so that there is no change.
- FIG. 7 is a cross-sectional view showing an assembly process of a pin assembly employing a push ring type elastic connector according to an embodiment of the present invention.
- FIG. 8 is a plan view and a partial cross-sectional view showing a pin assembly employing a push ring type elastic connector according to an embodiment of the present invention.
- the push ring type elastic connector 340 is inserted into the socket 336, and the two plate-shaped protrusions 342 inserted into the cylindrical holes inside the socket 336 are soldered. It is preferred to be connected by soldering and joined to the pin assembly 32.
- Preferred embodiments of assembling the elastic connector 340 and the pin member 330 according to an embodiment are as follows.
- Cavity filter 18 handles high frequency signals at the Giga Hertz level, and in delivering signals in these frequency bands, it is desirable to minimize the portion where mechanical contact may be incomplete.
- the mobile communication base station antenna in which the cavity filter 18 is used is important to ensure extremely low noise characteristics in the operating frequency band. Accordingly, there is a need to minimize passive intermodulation distortion (PIMD) caused by not only mechanical connection parts of various RF connection elements, but also metal contact parts and inside dissimilar metal coated parts.
- PIMD passive intermodulation distortion
- a radio frequency signal having high frequency and high energy may cause an intermediate frequency by mixing between multiple frequencies by nonlinearity of voltage and current at these contacts or the like.
- the signal quality of the antenna may be greatly degraded by the intermediate frequency which is close to the frequency of the main signal among the induced intermediate frequencies.
- This PIMD can be minimized by reliably joining the plate-like protrusions 342 inserted into the socket portion 336 by soldering.
- the pin assembly 32 employing the push ring type elastic connector according to an embodiment of the present invention is electrically and physically connected by soldering as described above, and the cavity filter 18 is installed in the form of a circular leaf spring. It is characterized in that it is connected to the electrode pad of the PCB substrate.
- the circular spring portion 344 provides a stable mechanical connection with the electrode pad, and because the impedance fluctuations of the signal line is small, the signal reflection performance is implemented in a simple component structure.
- FIG. 9 is a conceptual diagram illustrating a manufacturing method of an elastic connector of a push ring method according to an embodiment of the present invention.
- the elastic connector 340 may be press sheet metal formed from a spring plate and undergo heat treatment to form a state in which a plurality of elastic connectors 340 are easily bent and separated while one side is attached. Can be made. Since the circular spring portion 344 is in contact with the opening 338 of the socket portion 336 and the electrode pad, fine blanking is performed so that the burrs of the corner portion can be generated only inside the circular portion by fine blanking. It is desirable to.
- the diameter of the circular spring portion 344 is selected based on the outer diameter of the terminal body portion 334.
- the circular spring portion 344 has two points in close contact with the cone-shaped opening 338 of the socket portion 336, and is spaced apart from the inner circumferential surface of the third insertion hole 216 to have a predetermined characteristic impedance.
- This impedance value preferably forms the diameter of the circular spring portion 344 so as to be equal to or similar to the characteristic impedance between the outer diameter of the terminal body portion 334 and the third insertion opening 216.
- Impedance mismatching of the signal path in a signal of several hertz level may increase the voltage standing wave ratio so that the signal quality may be degraded due to signal reflection and distortion, so the change in impedance is preferably minimized.
- the circular spring portion 344 has a circular one side in contact with the electrode pad and is divided into two parts and electrically connected to the opening 338 of the socket portion 336, but the circular spring portion 344 has a diameter of 1 compared to the width. Since it may be determined at a level of about -2 times, when viewed from the inner circumferential surface of the third insertion hole 216 corresponding to the ground electrode, it may be seen that one cylindrical electrode is electrically extended. That is, in the high frequency signal band transmitted from the cavity filter 18 as in the present invention, even if the shape of the circular spring portion 344 is connected to the socket portion 336, the variation in impedance may be small.
- the 10 to 17 compare the RF characteristics of the various types of contact RF terminal unit 20 and the shape of the electric field through computer simulation.
- the right side of the analytical model is the terminal portion 20, and the left side is a cylindrical terminal corresponding to the electrode pad, and surrounds the cylindrical ground terminal.
- 11 is an electric field analysis result of the terminal portion of the general plunger system of FIG. 10.
- a terminal section of a conventional plunger structure shown in the middle of the electric field distribution appears due to structural limitations.
- the pin portion supported by the spring has a considerably smaller diameter than the pin housing accommodating the pin, and there is a section in which the gap is rapidly separated from the inner circumferential surface of the cylindrical ground end.
- the terminal portion of the general plunger structure has a smaller diameter of the protruding pin portion than the outer diameter of the plunger body, resulting in a sudden change in impedance, and thus has a high insertion loss (S21) value and a reflection loss (S11) value.
- the analysis shows that the insertion loss is -0.006dB and the return loss is -28dB at 4 GHz. This can be interpreted as a large reflection of the signal due to the impedance fluctuation region in the middle of the signal path.
- FIG. 12 is an analysis model of a terminal unit employing a push pin type elastic connector according to an exemplary embodiment of the present invention.
- 13 is an electric field analysis result of the terminal unit employing the push pin type elastic connector according to an embodiment of the present invention.
- the distribution of the electric field is relatively uniform.
- the push pin type elastic connector can maintain the spacing of the impedance discontinuous section relatively narrow, for example, 0.5 mm or less, and be similar to the outer diameter of the terminal body portion 234 based on the inner circumferential surface of the third insertion hole 216. It is advantageous to minimize the variation of impedance. Analysis results show that the insertion loss is -0.0003dB and the return loss is -41dB at 4 GHz.
- FIG. 14 is an analysis model of a terminal unit employing a push ring type elastic connector according to an exemplary embodiment of the present invention.
- 15 is an electric field analysis result of a terminal unit employing an elastic connector of a push ring method according to an embodiment of the present invention.
- the pin assembly 32 may have a relatively uniform electric field with the inner circumferential surface of the third insertion hole 216. It can be seen forming. Although the shape of the electric field is different from the inside of the circular spring portion 344, the distribution of the electric field is formed outside the circular spring portion 344, the change of the electric field is continuously made with respect to the inner peripheral surface of the third insertion hole 216 You can see that. That is, since there is no section in which the impedance of the signal line is changed discontinuously, there is an advantage that the insertion loss and the return loss can be kept low.
- the circular spring portion 344 has a simple structure while ensuring sufficient contact pressure, it can be deformed in various sizes can be easily impedance matching. Analysis results show that the insertion loss is -0.003dB and the return loss is -31dB at 4 GHz.
- FIG. 16 is a graph illustrating comparison results of insertion loss analysis of the contact RF terminal units disclosed in FIGS. 10, 12, and 14.
- FIG. 17 is a graph illustrating comparison of reflection loss analysis results of the contact RF terminal units disclosed in FIGS. 10, 12, and 14.
- the insertion loss and the reflection loss of the three types of terminal parts described above can be compared, and the terminal part 20 having the push pin structure has the best signal quality and the terminal part 30 having the push ring structure. ) Also showed sufficient performance for practical use.
- the influence of PIMD generation due to incomplete internal contact between the pin portion of the general plunger type and the pin housing is not considered in the analysis, and in consideration of this, the general plunger structure may further degrade the signal transmission quality.
- the terminal portion 20 having the push pin structure is firmly contacted by elasticity with both contact portions having an annular contact surface by the elastic connector 240, and the terminal portion 30 having the push ring structure is the socket portion 336. Is directly bonded by soldering, and the PCB board 130 can secure a stable contact by the elastic spring portion 344 of the circular spring part 344, so that even if external vibration is applied, the signal quality can be maintained uniformly without increasing PIMD. have.
- FIG. 18 is a conceptual diagram illustrating a terminal part structure of a cavity filter employing a leaf spring type elastic connector according to an embodiment of the present invention.
- FIG. 18A illustrates a pin member structure and a leaf spring inserted into the terminal insertion hole 410 of the cavity filter 18, and FIG. 18B is a plan view illustrating the leaf spring contact portion, and FIG. 18C. ) Is a side view showing the leaf spring contact.
- the leaf spring type terminal portion 40 may include a terminal insertion hole 410, a dielectric bush 420, a pin member 430, and a leaf spring type elastic connector 440. It includes.
- the terminal insertion hole 410 includes a fourth insertion hole 412 and a fourth insertion hole having an elongated cross section extending from the bottom surface of the first case 180 to accommodate the leaf spring type elastic connector 440.
- 412 includes a fifth insertion hole 414 in the form of a cylindrical hole formed at one central position of the long hole shape.
- the fourth insertion hole 412 is a region shown as a rectangle in Fig. 18 (c).
- the dielectric bush 420 is in the form of a two-stage cylinder and has a through hole penetrating the center of the rotating shaft.
- the first end of the dielectric bush 420 is formed to have a diameter that is inserted into the fifth insertion hole 414, and the second end having a diameter larger than the first end of the dielectric bush 420 is the fourth insertion hole 412. At least a portion of one side of the diameter is formed.
- the height of the second end of the dielectric bush 420 is a predetermined gap from one side or the ground electrode surface of the PCB board 130 to which the cavity filter 18 is coupled after the elastic connector 440 and the pin member 430 are assembled. It is set to a height having a constant impedance as a whole.
- the dielectric bush 420 may be made of Teflon material.
- the outer diameter of the first end of the dielectric bush 420 and the size of the through hole are determined in consideration of the dielectric constant of the dielectric bush 420 so that the terminal portion 40 has a predetermined characteristic impedance.
- the pin member 430 penetrates the elastic connector 440 and is inserted into the dielectric bush 420 to fix the pin 432 and the low height head that closely contacts the elastic connector 440 to the dielectric bush 420. portion 434.
- the outer circumferential surface of the pin portion 432 includes a wedge-shaped protrusion 435 formed so as not to fall out in the opposite direction in which the pin member 430 is inserted.
- the pin member 430 may be gold plated on the BeCu material.
- the leaf spring type elastic connector 440 extends from one side of the annular portion 444 and the annular portion 444 having a through hole 442 at the center thereof and having a narrower width than the annular portion 444.
- the first extension part 446 and the first extension part 446 are bent to have an obtuse angle (eg, 120 degrees to 130 degrees) so that the elastic connector 440 protrudes out of the bottom surface 188 of the first case 180.
- the tip of the second extension portion 448 is formed to press the electrode pad of the PCB board 130 formed to contact the same, and to maintain a predetermined contact area.
- Both sides of the bent portion 449 may have notches formed so that the bending operation may be performed with a uniform position and angle.
- the leaf spring type elastic connector 440 based on the bent portion 449 may be bent to provide an elastic force in the bent direction.
- the through hole 442 is formed to have a size that can penetrate only the pin portion 432 of the pin member 430.
- the annular portion 444 is in close contact between the head 434 and the second end of the dielectric bush 420 when the elastic connector 440 is assembled to the dielectric bush 420, the elastic connector 440 and the pin member 430 Is arranged to be electrically connected.
- a conductive paste may be applied between the elastic connector 440 and the pin member 430 or may be more firmly connected by soldering.
- the electrode pad of the PCB board 130 to which the leaf spring terminal portion 40 is electrically connected may have a circular electrode pad contacting the tip of the second extension portion 448.
- the impedance variation may be minimized by disposing a plurality of plated thru vias that penetrate the circular electrode pads through the PCB board 130 at an appropriate gap and pitch.
- 19 is a cross-sectional view illustrating a state in which a cavity filter is attached to a socket of a rear surface of an antenna board according to an embodiment of the present invention.
- FIG. 20 is a cross-sectional view illustrating a state in which a cavity filter is attached to a rear surface of an antenna board according to an embodiment of the present invention.
- the cavity filter 18 according to the exemplary embodiment of the present invention may be coupled to the socket 152 attached to the antenna board 150 as shown in FIG. 19, and As shown in FIG. 1, the electrode pad may be coupled to the electrode pad formed on the antenna board 150.
- the cavity filter 18 according to the exemplary embodiment of the present invention is connected to the antenna board 150 and the PCB board 130 with a predetermined contact pressure by the elastic connectors 240, 340, and 440, regardless of the assembly tolerance. It is possible to provide RF signal line connection with constant quality.
- Cavity filter 18 is used in the base station antenna device 10 as many as is mounted for each individual antenna (160). Tuning and verifying these cavity filters 18 precisely and quickly can be said to be an important factor for improving the quality and cost reduction of the base station antenna device 10.
- the cavity filter 18 including the terminal units 20, 30, and 40 of the elastic connectors 240, 340, and 440 provides a highly reproducible RF signal line connection. No coupling screw or snap lock member is required on the RF connector, and the electrode pad and the RF connector of the PCB to be assembled 130 are closely attached to each other by elasticity of the elastic connectors 240, 340, and 440. It is characterized by being removable.
- the following is a description of the verification of the cavity filter 18, which takes the case where the terminal portions 20, 30, 40 of the cavity filter 18 are arranged in the same direction. Even when the arrangement direction of the terminal parts 20, 30, 40 is reversed, the connection of the RF signal line can be made quickly and easily.
- 21 to 24 are examples of the case of the cavity filter 18 employing the push pin type and the push ring type elastic connectors 240 and 340
- FIGS. 25 and 26 are the leaf spring type elastic connectors ( An example is the case of the cavity filter 18 in which 440 is employed.
- 21 is a plan view illustrating a test board of a cavity filter according to an exemplary embodiment of the present invention.
- FIG. 22 is a cross-sectional view illustrating a test board of a cavity filter according to an exemplary embodiment of the present invention.
- the cavity filter 18 test board 50 is provided with a circular electrode pad in electrical contact with the elastic connectors 240 and 340, and tests the through-conducting vias to avoid contact with the elastic connectors 240 and 340 of the circular electrode pad. It is connected to the back of the board 50 is connected to the central terminal of the SMA RF connector 510.
- a device such as a network analyzer is connected to the SMA RF connector 510 so that the plurality of cavity filters 18 can be quickly verified.
- FIG. 23 is a plan view illustrating a test board of a cavity filter according to an exemplary embodiment of the present invention, in which a star washer disposed around an elastic connector is omitted.
- FIG. 24 is a cross-sectional view of FIG. 23 illustrating a test board of a cavity filter according to an embodiment of the present disclosure.
- the second annular groove 270 surrounding the outside of the third insertion hole 216 and the star washer 260 accommodated therein are omitted, and the left and right lengths of the cavity filter 18 are omitted.
- the configuration can be reduced more.
- the shape of the terminal unit 20 may be variously modified as shown in FIG. 5.
- FIG. 25 is a plan view illustrating a test board of a cavity filter including a leaf spring type elastic connector according to an exemplary embodiment of the present invention.
- FIG. 26 is a cross-sectional view of FIG. 25 illustrating a test board of a cavity filter employing a leaf spring type elastic connector according to an embodiment of the present invention.
- the cavity filter 18 having the leaf spring type terminal part may reduce the overall outer diameter of the terminal part 40 to be smaller than the embodiment shown in FIG. 22 or 24. It can be formed is advantageous in the case of reducing the left and right length.
- the cavity filter 18 test board 54 is basically a form in which the ground electrode surface is wide on both sides.
- the impedance variation can be minimized. Can be.
- FIG. 27 is a conceptual diagram illustrating a star washer according to an embodiment of the present invention.
- FIG. 28 is a conceptual view illustrating a process of forming a second annular groove having a dovetail shape accommodating a star washer according to an embodiment of the present invention.
- the first case 180 of the cavity filter 18 is hollow and has a complicated internal shape including a resonance element (not shown).
- the first case 180 is usually formed by pressing a material including aluminum or magnesium alloy.
- the second annular groove 270 of the first case 180 formed in a shape having a vertical wall is processed by a dovetail machining tool 910 so that the diameter of the inner edge thereof is increased.
- the washer 260 receiving portion is formed.
- the inlet of the dovetail-shaped second annular groove 270 is formed to the minimum diameter that the star washer 260 can be retracted and inserted by elasticity.
- FIG. 29 is a conceptual view illustrating a second annular recess accommodating a star washer and a press-fit pin for preventing separation of the star washer according to an embodiment of the present invention.
- a plurality of holes in which the press-fit pin 920 is inserted are formed outside the second annular groove 270 ′ and press-fit 3 or more press-fit pins 920 having a thin head formed therein to form a star washer ( 260 is a configuration for preventing the departure.
- FIG. 30 is a conceptual view illustrating a caulking process for preventing the separation of the second annular groove and the star washer containing the star washer according to an embodiment of the present invention.
- a plurality of holes are formed outside the second annular groove 270 ′′ and the side wall 930 of the second annular groove 270 ′′ is recessed toward the star washer 260 by caulking. It is a structure which prevents the departure of 260. FIG. The surface may rise locally by caulking. Therefore, the upper surface of the caulking hole 940 is formed to form a high reference plane coupled to the PCB board 130 or the height of the sidewall 930 of the second annular recess 270 ′′ is lower than the reference plane coupled to the PCB board 130. Counterbore (not shown) can be formed shallowly.
- a conductive paste may be applied between the star washer 260 and the second annular groove 270 ′′ to help ensure good electrical contact of the star washer 260 at all times.
- Cavity filter 18 provides an RF connection terminal portion 20, 30, 40 including an elastic connector 240, 340, 440 formed so that the terminal is exposed on both sides or one surface of the height direction. As a result, the thickness of the cavity filter 18 is reduced, whereby a massive MIMO antenna system having a slimmer and more compact laminated structure can be constructed.
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Abstract
Description
Claims (20)
- 이동통신용 기지국 안테나에 사용되며 외부 부재 상에 설치되는 캐비티 필터에 있어서,공진소자;상기 외부 부재 상에 배치되며 내부에 상기 공진소자를 포함하는 제1케이스; 및상기 제1 케이스를 관통하여 상기 외부 부재의 전극 패드와 상기 공진 소자를 전기적으로 연결하되, 상기 제1 케이스와 전기적으로 절연되는 단자부;를 포함하되,상기 단자부는,상기 제1케이스의 하단면으로부터 상기 제1케이스의 적어도 일부가 함몰된 단자 삽입구;상기 단자 삽입구 내부에 배치되며 일단이 상기 공진 소자에 연결되는 핀부 및 상기 핀부의 타단으로부터 연장되고 상기 핀부보다 직경이 큰 단자 몸체부를 포함하는 핀 부재; 및탄성을 가지는 전도체로 이루어지고, 상기 단자 몸체부와 상기 전극패드의 사이에 배치되어 양측을 전기적으로 연결하고, 상기 캐비티 필터가 상기 외부 부재에 설치되면 압축되어 상기 핀 부재와 상기 전극패드에 접촉 압력을 제공하도록 구성된 탄성커넥터;를 포함하는 것을 특징으로 하는 캐비티 필터.
- 제 1항에 있어서,상기 단자 삽입구에 삽입되는 유전체 부시를 더 포함하되,상기 단자 삽입구는,상기 단자 몸체부와 반경 방향으로 일정한 공극(air gap)을 가지는 제3삽입구;상기 제3삽입구보다 작은 직경을 가지며, 상기 유전체 부시의 일부가 삽입되는 제2삽입구; 및상기 제2삽입구보다 작은 직경을 가지며, 상기 유전체 부시의 일부가 삽입되는 제1삽입구;를 포함하는 것을 특징으로 하는 캐비티 필터.
- 제 1항에 있어서,상기 유전체 부시는,제1단과 상기 제1단보다 직경이 큰 제2단을 가지는 2단 실린더 형태이며 회전축 중심을 관통하는 관통 구멍이 형성되되,상기 제2단 측으로부터 상기 관통 구멍에 상기 핀부가 삽입되어 상기 유전체 부시에 상기 핀 부재가 고정되는 것을 특징으로 하는 캐비티 필터.
- 제 1항에 있어서,상기 핀부는,외주면에 상기 핀부가 상기 유전체 부시에 삽입된 반대 방향으로 빠지지 않도록 형성된 쐐기 형태의 돌기부를 포함하는 것을 특징으로 하는 캐비티 필터.
- 제 2항에 있어서,상기 단자 몸체부는,상기 제3삽입구의 깊이보다 짧게 형성되되,내부에 원통형상인 중공부; 및입구로부터 내측으로 직경이 감소하는 콘(cone) 형상의 개구부;를 포함하는 것을 특징으로 하는 캐비티 필터.
- 제 5항에 있어서,상기 중공부는,상기 중공부의 내주면에 형성되는 제1환형 요홈을 포함하는 것을 특징으로 하는 캐비티 필터.
- 제 6항에 있어서,상기 탄성커넥터는,상기 중공부에 삽입되는 원통형 부재;상기 원통형 부재의 외주면에 돌출된 쐐기 형태의 환형 돌기부;상기 원통형 부재에서 연장 형성되되, 상기 개구부에 삽입되는 잘린 원뿔 형상의 핀소켓 접촉부;상기 핀소켓 접촉부로부터 연장 형성되는 임피던스 매칭부(impedance matching portion); 및상기 탄성커넥터가 상기 중공부에 삽입된 후 외부로 노출되는 외측면으로부터 상기 탄성커넥터의 중심축을 따라 형성되는 적어도 하나의 절개부;를 포함하되,상기 절개부는 상기 환형 돌기부를 지나는 깊이까지 연장되고,상기 환형 돌기부는 상기 탄성커넥터가 상기 중공부에 삽입되면 상기 제 1 환형 요홈에 수용되어 상기 탄성커넥터의 이탈이 방지되는 크기로 형성되는 것을 특징으로 하는 캐비티 필터.
- 제 7항에 있어서,상기 핀소켓 접촉부의 중심축으로부터의 각도 크기는 상기 개구부의 중심축으로부터의 각도 크기보다 5~10도 크게 형성되는 것을 특징으로 하는 캐비티 필터.
- 제 7항에 있어서,상기 탄성커넥터의 외측면과 상기 임피던스 매칭부의 외주면이 이루는 전극모서리는 R0.1 내지 R0.5 범위의 라운드 형태로 형성되는 것을 특징으로 하는 캐비티 필터.
- 제 6항에 있어서,상기 중공부의 내측면과 상기 탄성커넥터 사이에 삽입되는 압축 스프링 형태의 핀 스프링을 더 포함하는 것을 특징으로 하는 캐비티 필터.
- 제 5항에 있어서,상기 탄성커넥터는,양측 단부를 제외한 길이 대부분이 일정한 폭을 가지는 세장형 스프링 판재로부터 성형된 것으로서 완성된 형태는 중앙부가 원형으로 성형된 원형 스프링부; 및상기 원형 스프링부의 원주상에 인접한 두 지점으로부터 원주에 대해 수직으로 돌출되는 두 개의 판형 돌출부;를 포함하되,상기 스프링 판재의 폭은 상기 중공부의 직경보다 작고,상기 원형 스프링부의 직경은 상기 단자 몸체부의 직경보다 큰 것을 특징으로 하는 캐비티 필터.
- 제 11항에 있어서,상기 개구부는 상기 원형 스프링부가 외접하는 각도로 형성되는 것을 특징으로 하는 캐비티 필터.
- 제 11항에 있어서,상기 중공부와 상기 중공부에 삽입된 상기 판형 돌출부 사이에는 땜납이 충전되어 상기 탄성커넥터와 상기 핀 부재를 전기적 및 기계적으로 연결하는 것을 특징으로 하는 캐비티 필터.
- 제 3항에 있어서,상기 단자 삽입구는,상기 제1케이스의 하단면으로부터 형성되되,상기 유전체 부시의 2단 실린더 형태 중 직경이 큰 부분과 같은 크기의 직경을 가지고 상기 하단면에 나란히 연장되는 장공 형태의 제4삽입구; 및상기 제4삽입구의 일측 중심 위치에 형성되고, 상기 유전체 부시의 제1단이 삽입되는 제5삽입구;를 포함하는 것을 특징으로 하는 캐비티 필터.
- 제 14항에 있어서,상기 탄성커넥터는,상기 핀부가 삽입되고 상기 단자 몸체부에 지지되도록 형성된 핀 삽입구;상기 핀부의 중심축에 수직인 방향으로 연장되는 제1연장부; 및상기 제1연장부로부터 둔각을 갖도록 절곡되어 상기 제1케이스의 하단면 바깥으로 돌출되도록 연장되는 제2연장부;를 포함하는 판 스프링 형태인 것을 특징으로 하는 캐비티 필터.
- 제 15항에 있어서,상기 단자 몸체부는,상기 핀부에 상기 탄성커넥터가 상기 핀 삽입구를 통해 삽입되고 상기 핀 부재가 상기 유전체 부시에 조립된 상태에서 상기 단자 몸체부의 외측면이 상기 제1케이스의 하단면으로부터 소정의 공극을 갖도록 형성되는 것을 특징으로 하는 캐비티 필터.
- 제 2항에 있어서,상기 제1케이스와 전기적으로 연결되는 스타 와셔(star washer)를 더 포함하고,상기 제1케이스는 상기 제3삽입구를 둘러싸는 제2환형 요홈을 더 포함하되,상기 제2환형 요홈은 상기 스타 와셔를 수용하고 상기 스타 와셔의 적어도 일부가 상기 제1케이스의 하단면 바깥으로 돌출되도록 형성되는 것을 특징으로 하는 캐비티 필터.
- 제 17항에 있어서,상기 제2환형 요홈은,외경에 해당하는 원주면이 깊이 방향으로 직경이 커지도록 환형의 더브테일(dovetail) 형상으로 형성되되,상기 제2환형 요홈의 입구 외경은 상기 스타 와셔가 탄성에 의해 오므려져 상기 제2환형 요홈에 삽입되고, 이탈이 방지될 수 있는 최소한의 직경으로 형성되는 것을 특징으로 하는 캐비티 필터.
- 제 17항에 있어서,상기 제2환형 요홈은,상기 제2환형 요홈 둘레에 형성되는 복수의 압입 핀 구멍; 및상기 압입 핀 구멍에 삽입되되, 삽입되면 상기 제1케이스의 하단면에 함몰되고 적어도 일부가 상기 제2환형 요홈으로 돌출되어 상기 스타 와셔의 이탈이 방지되는 크기의 머리부가 형성된 압입 핀;을 포함하는 것을 특징으로 하는 캐비티 필터.
- 제 17항에 있어서,상기 제2환형 요홈은,상기 제2환형 요홈 둘레에, 상기 제2 환형 요홈에 근접하여 형성되는 코킹 구멍을 포함하여,상기 스타 와셔가 삽입된 후 코킹 가공에 의해 상기 제2환형 요홈의 외경에 해당하는 원주면의 측벽이 상기 제2환형 요홈의 중심축을 향해 함몰되어 상기 스타 와셔의 이탈이 방지되도록 구성된 것을 특징으로 하는 캐비티 필터.
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| EP18748485.2A EP3579331B1 (en) | 2017-01-31 | 2018-01-26 | Cavity filter |
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| KR1020170074330A KR101966410B1 (ko) | 2017-01-31 | 2017-06-13 | 캐비티 필터 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022508748A (ja) * | 2018-10-15 | 2022-01-19 | ケーエムダブリュ・インコーポレーテッド | キャビティフィルタ |
| US11522260B2 (en) | 2018-10-15 | 2022-12-06 | Kmw Inc. | Cavity filter |
| CN115735331A (zh) * | 2020-04-29 | 2023-03-03 | 株式会社Kmw | 滤波器及其制造方法 |
| CN118693598A (zh) * | 2024-07-03 | 2024-09-24 | 深圳市华联威电子科技有限公司 | 一种多功能网络插座连接器的制备方法 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI3748766T3 (fi) * | 2018-01-31 | 2024-09-13 | Kmw Inc | Ontelosuodatin |
| CN210805970U (zh) | 2018-06-12 | 2020-06-19 | 株式会社Kmw | 空腔滤波器和连接器 |
| WO2019240490A1 (ko) | 2018-06-12 | 2019-12-19 | 주식회사 케이엠더블유 | 캐비티 필터 및 이에 포함되는 커넥팅 구조체 |
| KR102241462B1 (ko) * | 2018-06-12 | 2021-04-19 | 주식회사 케이엠더블유 | 캐비티 필터 |
| CN116325343B (zh) * | 2020-08-28 | 2026-01-06 | 株式会社Kmw | 天线用射频滤波器组装体 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060001510A1 (en) * | 2004-06-30 | 2006-01-05 | Engelhardt Robert J Jr | High isolation rf switch |
| KR20110041919A (ko) * | 2009-10-16 | 2011-04-22 | 주식회사 에이스테크놀로지 | 회로기판 연결장치 및 이를 구비하는 rf 캐비티 필터 |
| WO2015131600A1 (zh) * | 2014-10-11 | 2015-09-11 | 中兴通讯股份有限公司 | 一种射频单元 |
| KR20160044861A (ko) * | 2014-10-16 | 2016-04-26 | 주식회사 에이스테크놀로지 | 자동 튜닝이 가능한 rf 캐비티 장치 |
| KR200481791Y1 (ko) * | 2015-06-18 | 2016-11-09 | 동구안 에이스 테크놀로지스 코포레이션 | 캐비티 필터를 위한 커넥터 |
| KR20170013798A (ko) | 2015-12-22 | 2017-02-07 | (주)에스디메카텍 | 이류체 혼합 노즐 |
| KR20170074330A (ko) | 2015-12-22 | 2017-06-30 | 주승재 | 조립식 안경 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202308230U (zh) * | 2011-10-27 | 2012-07-04 | 上海子波电子科技有限公司 | 一种滤波器的插接结构 |
| CN204376138U (zh) * | 2014-12-24 | 2015-06-03 | 深圳市大富科技股份有限公司 | 同轴连接器及腔体滤波器 |
| CN204424413U (zh) * | 2015-01-23 | 2015-06-24 | 迈特通信设备(苏州)有限公司 | 一种滤波器及包括该滤波器的双工器 |
-
2018
- 2018-01-26 WO PCT/KR2018/001180 patent/WO2018143614A1/ko not_active Ceased
- 2018-01-30 CN CN201810091290.3A patent/CN108448213B/zh active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060001510A1 (en) * | 2004-06-30 | 2006-01-05 | Engelhardt Robert J Jr | High isolation rf switch |
| KR20110041919A (ko) * | 2009-10-16 | 2011-04-22 | 주식회사 에이스테크놀로지 | 회로기판 연결장치 및 이를 구비하는 rf 캐비티 필터 |
| WO2015131600A1 (zh) * | 2014-10-11 | 2015-09-11 | 中兴通讯股份有限公司 | 一种射频单元 |
| KR20160044861A (ko) * | 2014-10-16 | 2016-04-26 | 주식회사 에이스테크놀로지 | 자동 튜닝이 가능한 rf 캐비티 장치 |
| KR200481791Y1 (ko) * | 2015-06-18 | 2016-11-09 | 동구안 에이스 테크놀로지스 코포레이션 | 캐비티 필터를 위한 커넥터 |
| KR20170013798A (ko) | 2015-12-22 | 2017-02-07 | (주)에스디메카텍 | 이류체 혼합 노즐 |
| KR20170074330A (ko) | 2015-12-22 | 2017-06-30 | 주승재 | 조립식 안경 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022508748A (ja) * | 2018-10-15 | 2022-01-19 | ケーエムダブリュ・インコーポレーテッド | キャビティフィルタ |
| JP7146105B2 (ja) | 2018-10-15 | 2022-10-03 | ケーエムダブリュ・インコーポレーテッド | キャビティフィルタ |
| US11522260B2 (en) | 2018-10-15 | 2022-12-06 | Kmw Inc. | Cavity filter |
| CN115735331A (zh) * | 2020-04-29 | 2023-03-03 | 株式会社Kmw | 滤波器及其制造方法 |
| CN118693598A (zh) * | 2024-07-03 | 2024-09-24 | 深圳市华联威电子科技有限公司 | 一种多功能网络插座连接器的制备方法 |
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|---|---|
| CN108448213B (zh) | 2020-05-19 |
| CN108448213A (zh) | 2018-08-24 |
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