CN1707851A - Ultrahigh frequency conjoined multi-cavity patch dielectric filter - Google Patents
Ultrahigh frequency conjoined multi-cavity patch dielectric filter Download PDFInfo
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- CN1707851A CN1707851A CN 200510038854 CN200510038854A CN1707851A CN 1707851 A CN1707851 A CN 1707851A CN 200510038854 CN200510038854 CN 200510038854 CN 200510038854 A CN200510038854 A CN 200510038854A CN 1707851 A CN1707851 A CN 1707851A
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- 238000012216 screening Methods 0.000 claims description 42
- 230000008878 coupling Effects 0.000 claims description 15
- 238000010168 coupling process Methods 0.000 claims description 15
- 238000005859 coupling reaction Methods 0.000 claims description 15
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 13
- 229910052709 silver Inorganic materials 0.000 claims description 13
- 239000004332 silver Substances 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 208000002925 dental caries Diseases 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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Abstract
The invention relates to an ultrahigh frequency conjoined multi-cavity patch dielectric filter, which is a multi-cavity patch filter formed by conjoined a plurality of dielectric blocks and belongs to an electronic component. The dielectric filter consists of a printed circuit board (1), a connected multi-cavity dielectric filter (2) and a shielding shell (3), wherein the connected multi-cavity dielectric filter (2) is welded and fixed on the printed circuit board (1), the reverse side of the upper plane of the shielding shell (3) is welded and fixed on the upper surface of a grounding electrode (16), and the edge of the bottom of the front side surface of the shielding shell (3) is welded on a grounding end electrode (9) of the printed circuit board (1); the shielding shell (3) is provided with a rectangular through hole (4), the left end and the right end of the lower part of the front side plane of the shielding shell (3) are respectively provided with a rectangular through hole (5) and the middle is provided with a rectangular through hole (8). Its advantages are high anti-interference power to shield the external casing (3) and easy regulation of electric performance.
Description
Technical field:
Super high frequency conjoined multi-cavity paster media wave filter of the present invention is a kind of electronic devices and components, can regulate its ultra-high-frequency filter electrical property, and can shield interference signal, and directly being mounted on the printed circuit board (PCB), it is to belong to the multi-cavity paster filter of being made up of a plurality of medium block disjunctors.
Background technology:
Input signal is by behind the filter circuit, but do not need the frequency component passed through in the elimination signal, and dielectric filter is a kind of passive filter circuit, promptly is made up of resistance, electric capacity, inductance passive filtering element.The numerical value of these passive components and circuit connecting mode each other thereof have just determined resonance frequency, for this reason, can be designed to band pass filter, high pass and low pass filter, and band stop filter.
If each medium block is together in series, just form a band pass filter circuit, can make the signal component of certain frequency scope in institute's plus signal be able to by, sort circuit has required bandwidth and required centre frequency, and the signal component of selected frequency range can be passed through.
If these dielectric filters are made into bulk, and bore one or more through holes on each medium block, each medium block just can constitute one or more resonant cavitys, and its resonance frequency is determined by the geometry of medium block and the physical dimension of resonant cavity; Usually be coated with metal material on the surface of medium block again, form the middle coupling electrode of various input electrodes, output electrode, medium block, and grounding electrode, but under hyperfrequency, the microwave-medium filter that these medium blocks constituted can be subjected to interference from outside signals, and the filter defend degree is descended.
In the past dielectric filter generally just directly be fixed on medium block in the circuit, on the printed circuit board (PCB) or be installed on the printed circuit board (PCB) earlier, again medium block filter and printed circuit board (PCB) are installed in the circuitry needed together, but often all can not solve the hyperfrequency anti-interference problem.
Be that general dielectric filter does not add the metallic shield shell,, often just be not easy to regulate the centre frequency f of dielectric filter because if after applying the metallic shield shell
oAnd other electrical property, still, after dielectric filter is installed on the printed circuit board (PCB), often all need centre frequency f
oRegulated with other electrical properties, just need that Development and design goes out to have certain moulding for this reason and be convenient to metallic shield shell that the dielectric filter electrical property is regulated, and can appropriately be installed on dielectric filter and the printed circuit board (PCB).
Summary of the invention:
The purpose of this invention is to provide a kind of super high frequency conjoined multi-cavity paster media wave filter, overcome the shortcoming that hyperfrequency dielectric filter in the past is not easy to regulate centre frequency and electrical property, solved the signal interference problem of hyperfrequency dielectric filter simultaneously again.
A kind of super high frequency conjoined multi-cavity paster media wave filter, it is characterized in that it is made up of printed circuit board (PCB) (1), conjoined multi-cavity dielectric filter (2) and screening can (3), conjoined multi-cavity dielectric filter (2) is weldingly fixed on the printed circuit board (PCB) (1), the reverse side on the last plane of screening can (3) is weldingly fixed on earth electrode (16) upper surface of conjoined multi-cavity dielectric filter (2), and the leading flank bottom margin of screening can (3) is welded on the earth terminal electrode (9) of printed circuit board (PCB) (1); Have some rectangular through-hole (4) on the screening can (3).
The principle of the invention is described as follows;
Super high frequency conjoined multi-cavity paster media wave filter of the present invention is the dielectric filter that is composed in series a disjunctor by some single medium blocks, each medium block all has a through hole therein, the break-through medium block, this hole just forms a resonant cavity, on the cavity madial wall, be coated with the metallic conduction material, and also be coated with the metallic conduction material on each surface of each medium block, constitute the coupling electrode and the grounding electrode of medium block.
After each medium block is composed in series the disjunctor dielectric filter, between each medium block, be coupled by zigzag coupling electrode, two ends on a plane of this conjoined multi-cavity dielectric filter, form input electrode and output electrode respectively, other faces at this conjoined multi-cavity dielectric filter then constitute grounding electrode, and ground connection links to each other with the grounding electrode of screening can and printed circuit board (PCB).
The equivalent electric circuit of super high frequency conjoined multi-cavity paster filter of the present invention as shown in Figure 5, its series arm is some series coupled electric capacity, and parallel arm is some inductance resonant circuits in parallel with electric capacity, each resonant cavity just is equivalent to an antiresonant circuit.These medium blocks all have identical resonant cavity and geometry, and therefore the disjunctor dielectric filter after the series connection just has identical resonance frequency and other electrical characteristics.
As seen from Figure 6, this super high frequency conjoined multi-cavity paster media wave filter has good passband squareness factor and very high stopband defend degree.
Now the structure to super high frequency conjoined multi-cavity paster media wave filter of the present invention is described as follows;
The single medium block of this dielectric filter is a cuboid, as seen from Figure 3, perpendicular to the top of single medium block and below have a through hole, internal surface of hole is coated with the metallic conduction material; The electrode pattern that outer surface of upper in each medium block resonance hole all has zigzag to be coupled, electrode pattern then is outward an isolated area, and other outer surfaces of medium block also are coated with the metallic conduction material, constitute input electrode, output electrode and the isolated area except that respectively there is a place at the left and right two ends of leading flank, all the other metallic conduction materials that plate then constitute the earth electrode electrode.
As shown in Figure 3, above-mentioned single medium block just constitutes this conjoined multi-cavity dielectric filter after linking to each other, and the leading flank of this dielectric filter can directly be mounted on the printed circuit board (PCB), forms this conjoined multi-cavity paster formula dielectric filter.
Screening can is constituted by two orthogonal planes, on the crest line of two Plane intersects, it is big to have some, the little rectangular through-hole that does not wait, the inner surface on plane directly is welded on the trailing flank of this conjoined multi-cavity dielectric filter on the screening can, on the conjoined multi-cavity dielectric filter upper surface that promptly assembles, the lower edge of screening can leading flank is welded on the earth electrode of printed circuit board (PCB) upper surface front side, the leading flank of screening can and the conjoined multi-cavity medium block leading flank that assembles have certain clearance isolated, in case with conjoined multi-cavity medium block leading flank on some coupling electrode short circuits.Obviously screening can is made by metal material.The rectangular through-hole of being opened on the screening can is for the ease of polishing medium block open end surface silver layer, i.e. silver layer on the coupling electrode is so that regulate centre frequency f
o, make f
oIncrease; If will reduce centre frequency f
o, the surface silver layer of the medium block short-circuit end of then can polishing, the silver layer of the medium block upper surface after promptly assembling.
After screening can installs, can make external interference signals go into ground along the earth terminal that screening can enters printed circuit board (PCB).
Around resonant cavity one end of above-mentioned conjoined multi-cavity paster media piece, intercouple by some zigzag coupling electrodes, this just constitutes the coupling capacitance of series arm, and such zigzag electrode just can strengthen capacitive coupling, and the filter passband width can be strengthened.
Advantage according to the conjoined multi-cavity paster media wave filter that has screening can as mentioned above is as follows:
Originally the conjoined multi-cavity paster media wave filter that has a screening can not only mechanical structure is stable, and electrical property is also very stable, can shield the interference signal in the external world because of screening can is arranged, so can improve the defend degree of filter; In addition owing to have some rectangular through-hole on screening can, and these through holes so can regulate resonance frequency easily, both can make resonance frequency to adjusted between upper surface and front surface, also can make its downward adjusting.
Description of drawings:
Fig. 1: this super high frequency conjoined multi-cavity paster media wave filter contour structures schematic diagram.
Fig. 2: the printed circuit board (PCB) schematic perspective view of this super high frequency conjoined multi-cavity paster media wave filter.
Fig. 3: conjoined multi-cavity dielectric filter (2) schematic perspective view of this super high frequency conjoined multi-cavity paster media wave filter.
Fig. 4: the screening can of this super high frequency conjoined multi-cavity paster media wave filter (3) schematic perspective view.
Fig. 5: the equivalent circuit diagram of this super high frequency conjoined multi-cavity paster media wave filter.
Among the figure: series arm is a coupling capacitance, the antiresonant circuit impedance that on behalf of inductance and electric capacity, parallel arm form.Series arm one end in top is an input, and the other end is an output; The bottom series arm is an earth terminal.
Fig. 6: this super high frequency conjoined multi-cavity paster media wave filter attenuation frequency characteristic curve diagram.
Embodiment:
The centre frequency f of super high frequency conjoined multi-cavity paster media wave filter of the present invention
oFrequency range be: 400MHz～5.8GHz, input impedance of this dielectric filter and output resistance equate that its value Zc is 50 ohm, the passband width of this dielectric filter is f
o± 3MHz, i.e. 6MHz.
Referring to Fig. 1: in this high frequency conjoined multi-cavity paster media wave filter contour structures schematic diagram, the baseplane of conjoined multi-cavity dielectric filter (2) is welded on printed circuit board (PCB) (1) upper surface, the inner surface on the last plane of screening can (3) is welded on the upper surface of the conjoined multi-cavity dielectric filter (2) after the assembling, on the crest line of last plane of screening can (3) and front side Plane intersects, have some rectangular through-hole that differ in size (4), on a left side, screening can (3) leading flank bottom, respectively have a rectangular through-hole (5) near the right two ends, and have an intermediate rectangular through hole (8) at the preceding side plane lower middle position of screening can (3) place.
Among Fig. 1: printed circuit board (PCB) (1) input terminal electrode (6) and output terminal electrode (7) are coupled with the input electrode (12) of conjoined multi-cavity dielectric filter (2) and output electrode (14) respectively and are communicated with; The earth terminal electrode (9) of printed circuit board (PCB) (1) is communicated with the earth terminal electrode (16) of conjoined multi-cavity dielectric filter (2) and the lower limb welding of screening can (3) leading flank respectively; The forward and backward two edges and the left and right two edges of printed circuit board (PCB) (1) rectangular block all have some grooves (10), so that when the welding earth terminal, can hold some scolding tin, make solder side bigger more firm.
Referring to Fig. 2: Fig. 2 is the printed circuit board (PCB) (1) of a cuboid, four limit dash areas are grounding electrode (9) among the figure, complete blacking surface portion is input terminal electrode (6) and output terminal electrode (7) among the figure, because both are symmetrical, so both also interchangeable inversions are used; Groove in the forward and backward both sides of the edge of printed circuit board (PCB) (1) is a semicircular arc, and the groove on left and right both sides is a rectangle.
Referring to Fig. 3: in the conjoined multi-cavity dielectric filter (2) of Fig. 3, the resonant cavity of each single medium block (11) is a cylindrical cavity, and the input terminal electrode (12) of cavity inner surface silver coating conjoined multi-cavity dielectric filter (2) and output terminal electrode (14) are coupled with the input terminal electrode (6) and the output terminal electrode (7) of printed circuit board (PCB) (1) respectively; The adjacent coupled electrode pattern of the middle coupling electrode (13) of some single medium blocks is a zigzag fashion, its objective is that to make its coupling capacitance bigger; Conjoined multi-cavity dielectric filter (2) upper surface and leading flank have the isolated area (15) isolated with medium block grounding electrode (16), except input terminal electrode (12), output terminal electrode (14), some middle coupling electrodes (13) and the isolated area (15) of above-mentioned dielectric filter, all the other outer surfaces of dielectric filter (2) are all silver coated, constitute grounding electrode (16); This dielectric filter (2) is in series by 10 single medium blocks, and 10 resonant cavitys are arranged.
Referring to Fig. 4: screening can (3) is made by last plane and the preceding side plane copper material that curves the right angle that intersects vertically, and at the copper material electroplate, thickness of coating is 7 microns.Need by actual conditions, on the last plane and preceding side plane of screening can (3), have some rectangle angle bar shape through holes (4), on the center bending line of these rectangular through-hole (4) rib that plane and preceding side plane intersect vertically, be positioned at the cross central line place of rectangular through-hole thereon.
Left and right two ends in the preceding side plane of screening can (3) bottom respectively have a rectangular through-hole (5), be to collide even with screening can (3), because screening can (3) is a ground connection for the input terminal electrode (6) and the output terminal electrode (7) that prevent printed circuit board (PCB) (1).
At the preceding side plane lower middle position of screening can (3) place, have rectangular through-hole (8), be for the ease of regulating medium block open end bottom silver layer, so that control capacittance amount size, promptly regulate the electrical property of dielectric filter (2); Because the no trailing flank of screening can (3), promptly trailing flank opens wide again, thus silver layer that can electric mill medium block rear surface, so that can be with centre frequency f
oDownward modulation; Screening can (3) two sides are also opened wide, and promptly unshielded metal covering if also install the metallic shield shell additional in two sides, then must belong to concept protection range of the present invention.
Rectangular through-hole (4) is generally opened on corresponding to the screening can (3) between two resonant cavitys, can take into account the open end surface silver layer of two medium blocks of electric mill like this, also rectangular through-hole (4) can be opened other positions at screening can (3).After being gone some by electric mill above or below the medium block open end surface silver layer, centre frequency f then
oCan be corrected rise; If will reduce centre frequency f
oThe time, but then electric mill removes the surface silver layer of medium block rear side short-circuit end, then can make centre frequency f
oDownward modulation.
After applying this screening can (3), then can improve the defend degree of this dielectric filter, to eliminate the interference of external signal, promptly external interference signals can enter earth terminal along screening can (3) and goes into ground.
Referring to Fig. 5: in the equivalent circuit diagram of Fig. 5 as seen, because each monolithic medium block structure all is identical, so equivalent circuit diagram also is that symmetry is identical, Fig. 5 has represented 10 conjoined multi-cavity dielectric filters that the monolithic medium block is in series, horizontal left and right series connection end is promptly represented the input (12) and the output (14) of dielectric filter (2), and both can exchange; Earth terminal is promptly represented the earth terminal electrode (16) of dielectric filter.
Referring to Fig. 6: in the attenuation frequency characteristic curve diagram of Fig. 6, represented of the present invention with the be in series electrical characteristics of dielectric filter of disjunctor of 10 resonant cavity medium blocks, as seen from the figure: centre frequency f
oThe passband of ± 3MHz inserts attenuation and has only 12 decibels (dB), and centre frequency f
oThe decay of ± 20MHz then is 60 decibels (dB), as seen the squareness factor of super high frequency conjoined multi-cavity paster media wave filter of the present invention is good, owing to adopted the screening can of the present invention (3) and the geometric shapes that is connected thereof, made the microwave-medium filter of hyperfrequency have good performance.
Claims (9)
1, a kind of super high frequency conjoined multi-cavity paster media wave filter, it is characterized in that it is made up of printed circuit board (PCB) (1), conjoined multi-cavity dielectric filter (2) and screening can (3), conjoined multi-cavity dielectric filter (2) is weldingly fixed on the printed circuit board (PCB) (1), the reverse side on the last plane of screening can (3) is weldingly fixed on the ground connection upper surface of conjoined multi-cavity dielectric filter (2), and the leading flank bottom margin of screening can (3) is welded on the earth terminal electrode (9) of printed circuit board (PCB); Have some rectangular through-hole (4) on the screening can (3).
2, super high frequency conjoined multi-cavity paster media wave filter according to claim 1 is characterized in that the input terminal electrode (12) of conjoined multi-cavity dielectric filter (2) and output terminal electrode (14) are coupled with the input terminal electrode (6) and the output terminal electrode (7) of printed circuit board (PCB) (1) respectively.
3, super high frequency conjoined multi-cavity paster media wave filter according to claim 1 is characterized in that the adjacent coupled electrode pattern of the middle coupling electrode (13) of some single medium blocks is a zigzag fashion.
4, on super high frequency conjoined multi-cavity paster media wave filter according to claim 1, the center bending line that it is characterized in that some rectangular through-hole (4) of being opened on the screening can (3) rib that plane and preceding side plane intersect vertically thereon.
5, super high frequency conjoined multi-cavity paster media wave filter according to claim 1 is characterized in that left and right two ends, screening can (3) preceding side plane bottom respectively have rectangular through-hole (5), and the place, centre position has rectangular through-hole (8).
6, super high frequency conjoined multi-cavity paster media wave filter according to claim 1 is characterized in that the groove of the forward and backward both sides of the edge of printed circuit board (PCB) (1) is a semicircular arc; The and arranged on left and right sides groove is a rectangle.
7, super high frequency conjoined multi-cavity paster media wave filter according to claim 1 is characterized in that the resonant cavity (11) of single medium block is a cylindrical cavity, and the cavity inner surface is silver coated.
8, super high frequency conjoined multi-cavity paster media wave filter according to claim 1 is characterized in that conjoined multi-cavity dielectric filter (2) upper surface and leading flank have input, output electrode (12), (14) and coupling electrode (13) and the isolated isolated area (15) of medium block grounding electrode (16) in the middle of some.
9, super high frequency conjoined multi-cavity paster media wave filter according to claim 1, it is characterized in that all the other outer surfaces of dielectric filter (2) are silver coated grounding electrode (16) input terminal electrode (12), output terminal electrode (14), some middle coupling electrodes (13) and the isolated area (15) except above-mentioned dielectric filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038854 CN1707851A (en) | 2005-04-14 | 2005-04-14 | Ultrahigh frequency conjoined multi-cavity patch dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038854 CN1707851A (en) | 2005-04-14 | 2005-04-14 | Ultrahigh frequency conjoined multi-cavity patch dielectric filter |
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| Publication Number | Publication Date |
|---|---|
| CN1707851A true CN1707851A (en) | 2005-12-14 |
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|---|---|---|---|
| CN 200510038854 Pending CN1707851A (en) | 2005-04-14 | 2005-04-14 | Ultrahigh frequency conjoined multi-cavity patch dielectric filter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100539298C (en) * | 2006-05-11 | 2009-09-09 | 严盛喜 | Microwave Dielectric Module |
| CN102969555A (en) * | 2012-11-30 | 2013-03-13 | 武汉虹信通信技术有限责任公司 | TM01 medium resonator assembling device |
| WO2018148905A1 (en) * | 2017-02-16 | 2018-08-23 | 华为技术有限公司 | Dielectric filter, transceiver device, and base station |
| CN111934072A (en) * | 2020-08-20 | 2020-11-13 | 厦门松元电子有限公司 | Mixed different-wavelength resonant band-pass filter with capacitive coupling metal pattern |
| CN115621691A (en) * | 2022-11-10 | 2023-01-17 | 江苏灿勤科技股份有限公司 | A Dielectric Filter for Improving Far-End Rejection |
| CN118472573A (en) * | 2020-12-18 | 2024-08-09 | 江苏灿勤科技股份有限公司 | Dielectric duplexer with large frequency interval |
-
2005
- 2005-04-14 CN CN 200510038854 patent/CN1707851A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100539298C (en) * | 2006-05-11 | 2009-09-09 | 严盛喜 | Microwave Dielectric Module |
| CN102969555A (en) * | 2012-11-30 | 2013-03-13 | 武汉虹信通信技术有限责任公司 | TM01 medium resonator assembling device |
| CN102969555B (en) * | 2012-11-30 | 2016-03-02 | 武汉虹信通信技术有限责任公司 | A kind of TM01 dielectric resonator assembling device |
| WO2018148905A1 (en) * | 2017-02-16 | 2018-08-23 | 华为技术有限公司 | Dielectric filter, transceiver device, and base station |
| US11139546B2 (en) | 2017-02-16 | 2021-10-05 | Huawei Technologies Co., Ltd. | Dielectric filter, transceiver device, and base station |
| US11664564B2 (en) | 2017-02-16 | 2023-05-30 | Huawei Technologies Co., Ltd. | Dielectric filter, transceiver device, and base station |
| CN111934072A (en) * | 2020-08-20 | 2020-11-13 | 厦门松元电子有限公司 | Mixed different-wavelength resonant band-pass filter with capacitive coupling metal pattern |
| CN111934072B (en) * | 2020-08-20 | 2024-12-17 | 厦门松元电子股份有限公司 | Mixed different wavelength resonant band-pass filter with capacitive coupling metal pattern |
| CN118472573A (en) * | 2020-12-18 | 2024-08-09 | 江苏灿勤科技股份有限公司 | Dielectric duplexer with large frequency interval |
| CN115621691A (en) * | 2022-11-10 | 2023-01-17 | 江苏灿勤科技股份有限公司 | A Dielectric Filter for Improving Far-End Rejection |
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