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WO2001071847A1 - Antenne multifrequence - Google Patents

Antenne multifrequence Download PDF

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Publication number
WO2001071847A1
WO2001071847A1 PCT/JP2001/001362 JP0101362W WO0171847A1 WO 2001071847 A1 WO2001071847 A1 WO 2001071847A1 JP 0101362 W JP0101362 W JP 0101362W WO 0171847 A1 WO0171847 A1 WO 0171847A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
net
frequency
frequency band
frequency antenna
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.)
Ceased
Application number
PCT/JP2001/001362
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi Shimizu
Yoshio Kadota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Antenna Co Ltd
Original Assignee
Nippon Antenna Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Antenna Co Ltd filed Critical Nippon Antenna Co Ltd
Priority to DE60100492T priority Critical patent/DE60100492T2/de
Priority to EP01906261A priority patent/EP1187253B1/fr
Publication of WO2001071847A1 publication Critical patent/WO2001071847A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
    • H01Q1/3275—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32—Vertical arrangement of element

Definitions

  • the present invention relates to a multi-frequency antenna that operates in a first frequency band and a second frequency band, and is mounted on a vehicle that can receive a first mobile radio band, a second mobile radio band, an FMZAM radio band, and a GPS band. This is suitable for application to the multi-frequency antenna described above. Background art
  • antennas There are various types of antennas that can be mounted on the vehicle body.However, if the antenna is mounted on the roof located at the highest position on the vehicle body, it is possible to increase the receiving sensitivity. There. In addition, since FM / AM radios are generally installed in the vehicle body, antennas that can receive both FM and radio bands are convenient, and roof antennas that can receive signals by sharing two radio bands have become popular. I have.
  • GPS Global Positioning System
  • a keyless entry antenna is installed on the vehicle body.
  • This type of multi-frequency antenna a multi-frequency antenna described in Japanese Patent Application Laid-Open No. Hei 6-132714 is known.
  • This multi-frequency antenna is a three-wave antenna that can receive mobile phone band, FM radio band and AM radio band. It consists of an antenna, a planar radiator that is a GPS antenna that receives the GPS signal, and a loop radiator that is a keyless antenna that receives the keyless entry signal.
  • Each of these antennas is installed on the upper surface of the main body, but a metal plate is provided on the upper part of the main body, and a planar radiator and a loop radiator are formed on the plate via a dielectric layer. Have been. Since this plate becomes the ground plane, the plane radiator and the loop radiator operate as a microstrip antenna. Note that a protection bar is formed on the plane radiator and the loop radiator.
  • This multi-frequency antenna is composed of an antenna element provided with a trap coil so as to resonate at multiple frequencies, and a cover section in which a matching board or the like to which the antenna element is attached is incorporated. By fixing this cover to the roof, a multi-frequency antenna can be attached to the roof.
  • a plurality of frequency bands are generally assigned to a frequency band used for a mobile phone.
  • a frequency band used for a mobile phone For example, in the PDC system (Personal Digital Cellular telecommunication system) in Japan, 800 MHz band (810 MHz to 956 MHz) and 1.4 GHz band (1429 MHz to 501 MHz) are allocated.
  • the GSM global system for mobile communications; 80-MHz (87-96 OMHz)) and the 1.7-GHz (1.71 MHz) ⁇ :
  • the DCS (Digital Cellular System) method of 188 MHz is adopted.
  • An object of the present invention is to provide a multi-frequency antenna having a novel configuration that operates over two different wide frequency bands.
  • an intermediate element between the first element operating in the first frequency band is provided.
  • a second element having a rectangular enlarged radiating surface operating in a second frequency band higher than the first frequency band is provided.
  • the first frequency band is a first mobile radio band
  • the second frequency band is a frequency band almost twice as high as the first mobile radio band. It is a mobile radio band. .
  • a compact multi-frequency It can be an antenna.
  • a circuit board incorporating a duplexer or the like can be accommodated in the space in the cover.
  • an element operating in a much lower frequency band such as an AMZFM band is provided at the upper end of the first element via a choke coil, a multi-frequency antenna having three or more frequencies can be obtained.
  • the GPS antenna unit is provided in the storage space inside the cover, the GPS signal can be received without being affected by other antennas.
  • FIG. 1 is a partial sectional view showing a configuration of a first embodiment of a multi-frequency antenna according to the present invention.
  • FIG. 2 is an enlarged view showing a part of the multi-frequency antenna according to the first embodiment of the present invention.
  • FIG. 3 is a diagram showing a configuration of a lower element of a divided D-net element and a configuration of an E-net element in the multi-frequency antenna according to the first embodiment of the present invention.
  • FIG. 4 is a diagram showing a detailed configuration of a lower element of a divided D-net element in the multi-frequency antenna according to the first embodiment of the present invention.
  • FIG. 5 is a diagram showing a detailed configuration of an E-net element in the multi-frequency antenna according to the first embodiment of the present invention.
  • FIG. 6 is a diagram showing a schematic configuration of an E-net element connected to a D-net element in the multi-frequency antenna according to the first embodiment of the present invention.
  • FIG. 7 shows the impedance characteristics in the frequency band of the D net when the dimensions of the D net element and the E net element in the multi-frequency antenna according to the first embodiment of the present invention are set to specific constants.
  • FIG. 8 shows the VS WR characteristics in the frequency band of the D net when the dimensions of the D net element and the E net element in the multi-frequency antenna according to the first embodiment of the present invention are set to specific constants.
  • FIG. 9 shows impedance characteristics in a frequency band of the E-net when the dimensions of the D-net element and the E-net element in the multi-frequency antenna according to the first embodiment of the present invention are set to specific constants.
  • FIG. 10 shows the VSWR in the frequency band of the E-net when the dimensions of the D-net element and the E-net element in the multi-frequency antenna of the first embodiment of the present invention are set to specific constants. It is a figure showing a characteristic.
  • FIG. 11 shows the directivity in the horizontal plane at the lowest frequency of the D net when the dimensions of the D net element and the E net element in the multi-frequency antenna according to the first embodiment of the present invention are specified constants. It is a figure which shows a characteristic and a measurement mode.
  • FIG. 12 shows the horizontal plane at the center frequency and the maximum frequency of the D-net when the dimensions of the D-net element and the E-net element in the multi-frequency antenna according to the first embodiment of the present invention are set to specific constants.
  • FIG. 4 is a diagram showing directional characteristics in the inside.
  • FIG. 13 is a horizontal plane at the lowest frequency and center frequency of the E-net when the dimensions of the D-net element and the E-net element in the multi-frequency antenna according to the first embodiment of the present invention are specified constants.
  • FIG. 4 is a diagram showing directional characteristics in the inside.
  • FIG. 14 shows the directivity in the horizontal plane at the highest frequency of the E-net when the dimensions of the D-net element and the E-net element in the multi-frequency antenna according to the first embodiment of the present invention are specified constants. It is a figure showing a characteristic.
  • FIG. 15 is a diagram showing a measurement mode of a directional characteristic in a vertical plane when directly facing the multi-frequency antenna according to the first embodiment of the present invention.
  • FIG. 16 is a graph showing the relationship between the minimum frequency and the center frequency of the D-net when the dimensions of the D-net element and the E-net element in the multi-frequency antenna according to the first embodiment of the present invention are specified constants.
  • FIG. 3 is a diagram illustrating in-plane directional characteristics.
  • FIG. 17 shows the maximum frequency of the D-net and the minimum frequency of the E-net when the dimensions of the D-net element and the E-net element in the multi-frequency antenna according to the first embodiment of the present invention are set to specific constants.
  • FIG. 18 is a diagram showing directivity characteristics in a vertical plane at a frequency.
  • FIG. 18 shows the dimensions of the D-net element and the E-net element in the multi-frequency antenna according to the first embodiment of the present invention as specific constants.
  • FIG. 9 is a diagram showing directivity characteristics in a vertical plane at the center frequency and the highest frequency of the E-net at the time of performing.
  • FIG. 19 is a diagram showing a measurement mode of a directional characteristic in a vertical plane when the multi-frequency antenna according to the first embodiment of the present invention is applied to a side surface.
  • FIG. 20 is a view showing the vertical plane at the lowest frequency of the D net when the dimensions of the D net element and the E net element in the multi-frequency antenna according to the first embodiment of the present invention are specified constants.
  • FIG. 4 is a diagram illustrating directional characteristics.
  • FIG. 21 is a view showing the vertical frequency at the center frequency and the highest frequency of the D net when the dimensions of the D net element and the E net element in the multi-frequency antenna according to the first embodiment of the present invention are specified constants.
  • FIG. 3 is a diagram illustrating in-plane directional characteristics.
  • '' Fig. 22 shows the center of the lowest frequency of the E-net when the dimensions of the D-net element and the E-net element in the multi-frequency antenna of the first embodiment of the present invention are specified constants.
  • FIG. 5 is a diagram illustrating directivity characteristics in a vertical plane at a frequency.
  • FIG. 23 is a view showing a vertical plane at the highest frequency of the E-net when the dimensions of the D-net element and the E-net element in the multi-frequency antenna according to the first embodiment of the present invention are set to specific constants.
  • FIG. 4 is a diagram illustrating directional characteristics.
  • FIG. 24 is a diagram showing a configuration of a multi-frequency antenna according to a second embodiment of the present invention in a partial cross-sectional view.
  • FIG. 25 is an enlarged view showing a part of the multi-frequency antenna according to the second embodiment of the present invention.
  • FIG. 26 is a diagram showing a configuration of a lower element of a divided D-net element and a configuration of an E-net element in the multi-frequency antenna according to the second embodiment of the present invention.
  • FIG. 27 is a diagram showing a detailed configuration of a lower element of the divided D-net element in the multi-frequency antenna according to the second embodiment of the present invention.
  • FIG. 28 is a diagram showing a detailed configuration of an E-net element in the multi-frequency antenna according to the second embodiment of the present invention.
  • FIG. 29 is a diagram showing a schematic configuration of an E-net element connected to a D-net element in the multi-frequency antenna according to the second embodiment of the present invention.
  • FIG. 1 is a partial cross-sectional view of the configuration of the first embodiment of the multi-frequency antenna according to the present invention
  • FIG. 2 is an enlarged view of a part thereof.
  • the multi-frequency antenna 100 according to the first embodiment of the present invention includes a linear antenna element 1 and a resin cover 2 to which the antenna element 1 is detachably attached. It is composed of
  • the antenna element 1 includes a helical element portion 31 formed in a helical shape, and an antenna top 32 provided at an upper end of the helical element portion 31. Further, a molded antenna base 30 is provided at the lower end of the helical element 31.
  • the antenna base 30 includes a bendable flexible element 16 connected to the lower end of the helical element 31, and a choke coil having one end connected to the lower end of the flexible element 16. There are 14 provided. Further, the other end of the yoke coil 14 is connected to a D-net element 13 corresponding to an upper element for the D-net, and a fixed screw portion 12 is provided at a lower end of the D-net element 13. Is provided.
  • the D-net means the first mobile telephone band according to the above-mentioned GSM method
  • the E-net described later means the second mobile telephone band according to the above-mentioned DSC method.
  • the flexible element portion 16 is a portion that bends when a horizontal load is applied to the antenna element 1 to prevent breakage.
  • the flexible element 16 can be made of a flexible wire cable or coil spring.
  • a metal base 25 is fitted to the bottom surface of the cover 2 formed by resin molding as shown in FIG. 2, and the base 25 is attached to a vehicle body roof or the like.
  • a cylindrical mounting portion 24 is formed so as to protrude.
  • a screw is cut on the outer peripheral surface of the base 25, and a signal cable and a power cable led from inside the cover 2 can be passed through a through hole inside the base 25.
  • FIG. 3 shows the configuration of the lower element 10 for the D net and the element 11 for the E net.
  • force par On the upper surface of the portion 2, a screwing portion 2a to which a fixing screw portion 12 provided at the lower end of the antenna base 30 is screwed is provided.
  • the metal screwed portion 2 a is threaded on the inner peripheral surface and is insert-molded and fixed to the cover 2.
  • connection portion 10 formed at the tip of the lower element 10 and to which a connection insertion portion 12a formed at the tip of the fixing screw portion 12 is screwed. a is located. That is, the connecting portion 10a is fixed to the D-net element 13 in the antenna base 30 by screwing the fixing screw portion 12 provided on the antenna base portion 30 to the screwing portion 2a. It becomes electrically connected via the screw portion 12. As a result, the D-net element 13 constituting one element of the divided D-net antenna is connected to the lower element 10 constituting the other element. Become.
  • the lower end of the lower element 10 is soldered to a circuit board 21.
  • the circuit board 21 is provided with a filter for demultiplexing the mobile telephone band of the D-net and the E-net and the AM / FM band. ing.
  • the split AM / FM band signal is amplified by an amplifier circuit mounted on an amplification substrate 22 housed in the cover unit 2.
  • the cover unit 2 houses a GPS unit 23 composed of a GPS antenna and a converter unit for converting a received GPS signal into an intermediate frequency signal. In this case, since the E-net element 11 is arranged on the back of the lower element 10, the low elevation angle directivity of the GPS antenna in the GPS unit 23 is not affected.
  • the signal cable connected to the circuit board 21 derives the signals of the mobile telephone band of the D-net and the E-net, the amplifier board 22 derives the signal of the AMZ FM signal band, and the GPS unit 23 From the signal cable connected to, a GPS signal converted to an intermediate frequency signal is derived.
  • These cables are pulled out of the cover part 2 by penetrating the inside of the mounting part 24, and are connected to corresponding devices installed in the vehicle body.
  • FIG. 3 shows the configuration of the lower element 10 for the D-net and the element 11 for the E-net.
  • the front end is bent into a plate shape so as to have a substantially L-shaped cross section by processing a metal plate, and is formed at the bent front end.
  • Connection part 1 2a is screwed approximately at the center of the connection part 10a
  • the threaded portion 10 d to be formed is formed.
  • a soldering piece 10b to be soldered to the circuit board 21 is formed.
  • the E-net element 11 is formed by processing a metal plate so as to have a substantially rectangular radiation surface, and a connection piece extending from a substantially center of one side thereof is bent in a U-shape. Thus, a holding piece 11a is formed at the tip. The holding piece 11 a is inserted into a cutout window formed in the upper part of the main body piece of the lower element 10 to hold the lower element 10. By soldering the sandwiched portion, the E-net element 11 can be fixed to the lower element 10 and can be electrically connected to each other.
  • the E-net element 11 1 has a substantially rectangular enlarged radiation surface in order to make the directional characteristics in a horizontal plane almost omnidirectional as described later. .
  • the E-net element 11 is formed so that both ends are slightly bent forward and both corners of the upper edge are cut off. This is for storing the E-net element 11 in a narrow storage space formed by the back surface of the lower element 10 and the wall surface of the cover 2. It should be noted that such bending or cutting off both corners does not affect the directional characteristics of the horizontal plane ⁇ .
  • the multi-frequency antenna 100 of the first embodiment of the present invention when the antenna element 1 is screwed into the cover 2, is divided into the D-net elements 13 and D
  • the lower element 10 for the net is connected. That is, in the multi-frequency antenna 100 according to the first embodiment of the present invention, as shown in FIG. 1, the D-net antenna extends from the circuit board 21 to the lower end of the choke coil 14. It works as an antenna.
  • the E-net antenna is an antenna that operates in a range from the circuit board 21 to the upper end of the lower element 10.
  • the antenna for the AM / FM band is an antenna that operates in a range from the circuit board 21 to the antenna top 32. However, there is no resonance in the AM band.
  • FIG. 4 shows a detailed configuration of the lower element 10, and FIG. FIG. 2B is a front view, FIG. 2B is a side view, FIG. 1C is a rear view, and FIG. 1D is a bottom view.
  • the lower element 10 is formed into a plate shape by processing a metal plate so that the tip is bent so that the cross section becomes substantially L-shaped.
  • the bent distal end is used as a connection portion 10a, and a screw portion 10d to which the connection insertion portion 12a is screwed is formed substantially at the center of the connection portion 10a.
  • the main body piece 10c extending downward from the edge of the connecting portion 10a is tapered so that the width of the lower end portion is reduced and the upper portion is slightly bent toward the rear side. Have been.
  • a soldering piece 10b to be soldered to the circuit board 21 is formed at the lower end of the body piece 10c. Further, a part of the upper part of the main body piece 10c is cut out to form a cutout window 10e.
  • FIG. 5 shows the detailed configuration of the E-net element 11;
  • FIG. 5 (a) is a front view of the E-net element 11,
  • FIG. 5 (b) is a side view thereof, and
  • FIG. ) Is a bottom view.
  • the E-net element 11 is formed by processing a metal plate so as to have a substantially rectangular enlarged radiation surface.
  • the end pieces 1 1d and 1 1e are slightly bent forward, and both upper edges are cut off. Further, a portion is extended from substantially the center of the upper side and bent in a U-shape to form a connection piece 11 f and a bent piece 11 b. A part of the leading edge of the bent piece 11b is cut and bent to form the holding piece 11a.
  • the holding piece 11a is inserted so as to straddle the notch window 10e formed in the upper part of the main body piece 10c of the lower element 10 and the lower element 1 0 is pinched.
  • the E-net element 11 can be fixed to the lower element 10 and electrically connected to each other. Will be able to do it.
  • the bending angle of the central piece 11c with respect to the connecting piece 11f was made larger than 90 °, and when the E-net element 11 was fixed to the lower element 10, the lower element 10 And the central piece 1 1c of the E-net element 1 1 I am trying to.
  • the multi-frequency antenna 100 of the first embodiment of the present invention operates simultaneously as the D-net and E-net of the mobile telephone band and the 4-frequency antenna of the AMZ FM band,
  • a GPS unit 23 provided separately can receive GPS signals.
  • the element for D-net which is one of the elements divided in the antenna base 30 You only need to store 13
  • the multi-frequency antenna 100 of the first embodiment of the present invention may be a multi-frequency antenna that operates only on the D-net and the E-net in the antenna element 1 as described above. In this case, of course, the length of the antenna element 1 can be shortened accordingly.
  • FIG. 6 (a) shows a principle antenna configuration of the multi-frequency antenna 100 according to the first embodiment of the present invention, which operates on the D net and the E net.
  • the divided D-net antenna has a D-net element 13 at the upper part and a lower element 10 of length L2 at the lower part.
  • L1 is a linear antenna.
  • the antenna for the D net configured as described above is set up at a slight angle with an angle ⁇ 1 from the horizontal plane.
  • An E-net element 11 having a length L3 is connected to a portion where the D-net element 13 and the lower element 10 are connected.
  • the E-net element 11 is spaced apart from the lower element 10 by the length L4 of the connection piece 11f, and is arranged substantially in parallel.
  • the distal end of the connecting piece 11 f is connected to the intermediate portion of the D-net antenna composed of the D-net element 13 and the lower element 10.
  • this E-net element 11 is as shown in Fig. 5, but its schematic shape is shown in Figs. 6 (b) and 6 (c), and the rectangular shape forming the enlarged radiation surface is shown. The width of the shape is assumed to be W1. And As shown in the figure, the lower end of the lower element 10 is a feed point for the D-net antenna and the E-net element 11.
  • the dimension of L4 is the frequency and angle of the first frequency band of the D-net used and the second frequency band of the E-net 0 Determined according to 1.
  • the length L1 of the antenna for the D-net is approximately 0.202 ⁇ 1
  • the length L2 of the lower element 10 is approximately 0.136 ⁇ 2
  • the length L3 of the element 11 is about 0.102
  • the width W1 is about 0.162
  • the distance L4 between the antenna for D-net and the element 11 for net is about 0.021.
  • FIG. 1 the length, width, and interval of the divided D-net element 13, lower element 10, and ⁇ -net element 11 are determined.
  • FIGS. 7 and 9 show the impedance characteristics of the multi-frequency antenna 100 when the above constants are used, and FIGS. 8 and 10 show the VSWR characteristics.
  • Figure 7 shows the impedance characteristics of the D-net in the 80-band (870-96 mm), and the impedance value is around 50 ⁇ in the 870-960 MHz frequency band.
  • 50 ⁇ is the impedance value to be matched.
  • Fig. 9 shows the impedance characteristics of the E-net in the 1.7 GHz band (1 710 MHz to 1 880 MHz). In this case, the impedance value is around 50 ⁇ .
  • Fig. 8 shows the VSWR characteristics of the D-net in the 80 OMHz band (87 OMHz to 96 OMHz). Good VSWR value is obtained.
  • Fig. 10 Shows the VSWR characteristics of the E-net in the 1.7 GHz band (1710 ⁇ to 1880MHz), and a VSWR value of about 2.0 or less was obtained in the frequency band of 1710 ⁇ to 1880MHz. In particular, a good VSWR value of about 1.5 or less has been obtained in the frequency range from low to midrange. In this case, even if the E-net element 11 is removed, the characteristics of the D-net antenna composed of the lower element 10 of the D-net element 13 are not significantly changed. The antennas can operate independently of each other. However, its operating principle is unclear at present.
  • FIGS. 11 to 14 show the directivity characteristics of the multi-frequency antenna 100 in the horizontal plane when the above constants are used.
  • FIG. 11 (a) is a diagram showing a measurement mode in which the multi-frequency antenna 100 is arranged on a ground plane 50 having a sufficient area, and a horizontal angle as a reference. This corresponds to the horizontal angle in the directional characteristics.
  • 2 shows the directional characteristics of the multi-frequency antenna 100 in a horizontal plane. As shown in the figure, although the level is lower than that of the D-net, almost omnidirectional directional characteristics are obtained. At this time, the gain of the multi-frequency antenna 100 is about 0.8 dB as a Z4 whip antenna ratio.
  • FIG. 15 is a diagram showing a measurement mode in which the multi-frequency antenna 100 is disposed directly on the ground plane 50 having a sufficient area, and a vertical angle which is a reference of the measurement mode. This corresponds to the vertical angle in the in-plane directional characteristics.
  • the main beam width is narrower than in the case of the D-net, good directivity characteristics with a maximum level at a launch angle of about ⁇ 60 ° are obtained.
  • the gain of the multi-frequency antenna 100 is about +3.98 dB in comparison with the dipole antenna.
  • FIGS. 20 to 23 show the directional characteristics in a vertical plane when the multi-frequency antenna 100 is set on the side surface when the constants are obtained.
  • FIG. 19 shows a measurement mode in which the multi-frequency antenna 100 is arranged on the ground plane 50 having a sufficient area so as to face the side surface, and a vertical direction as a reference. It is a figure which shows an angle, and respond
  • the gain of the multi-frequency antenna 100 is about +1.67 dB in comparison with the dipole antenna.
  • the gain of the multi-frequency antenna 100 is about +0.47 dB in comparison with the dipole antenna.
  • the gain of the multi-frequency antenna 100 is about +2.44 dB in comparison with the dipole antenna.
  • FIG. 23 shows the directivity of the multi-frequency antenna 100 in the horizontal plane at the highest frequency ⁇ 188 ⁇ of the E-net frequency band. As shown in the figure, the directional characteristics with the maximum level are obtained at launch angles of about + 75 ° and about 165 °. At this time, the gain of the multi-frequency antenna 100 is about +4.46 dB in comparison with the dipole antenna.
  • the directional characteristics in the vertical plane even if the antenna element 1 is tilted at about 76 ° as shown in the directional characteristics in the vertical plane, the directional characteristics in the vertical plane are reduced. Will be radiated in all directions at a good launch angle of about ⁇ 60 °. Further, the directional characteristics in the horizontal plane are almost omnidirectional as shown in FIGS. 11 to 14. This makes it possible to make the multi-frequency antenna 100 according to the first embodiment of the present invention suitable for operating in a mobile telephone band.
  • FIGS. 24 and 25 show the configuration of a second embodiment of the multi-frequency antenna according to the present invention.
  • the antenna element 201 is erected and tilted from the antenna element 1 of the first embodiment.
  • the angle of this inclination is, for example, about 50 degrees.
  • the configuration of the multi-frequency antenna 200 of the second embodiment of the present invention is the same as that of the first embodiment except that the configuration is inclined with respect to the multi-frequency antenna 100 of the first embodiment. The tilting configuration will be described below.
  • the antenna element 201 is erected at an inclination angle of about 50 ° from a horizontal plane, for example. This inclination is achieved because the metal screwed portion 202a insert-molded in the cover portion 202 is tilted and fixed to the cover portion 202. That is, the configuration of antenna element 201 is the same as that of antenna element 1. However, the length of the D-net element 2 13 is different from the length of the D-net element 13. As described above, the configuration of the cover part 202 is different from the configuration of the cover part 2 and the cover part 202 The configurations of the lower element 210 and the E-net element 211, which are housed in the housing, are also different.
  • FIG. 26 shows the configuration of the lower element 210 and the E-net element 211 in the multi-frequency antenna 200 of the second embodiment of the present invention.
  • the tip is bent into a plate shape so that the cross section becomes substantially L-shaped by processing a metal plate.
  • a screw portion 210d to which the connection insertion portion 212a is screwed is formed.
  • a soldering piece 21Ob to be soldered to the circuit board 222 is formed at the lower end of the lower element 210.
  • the E-net element 211 is formed in a substantially rectangular shape by processing a metal plate, and a connection piece extending from substantially the center of one side thereof is bent in a U-shape. Thus, a holding piece 2 1 1a is formed at the distal end. The holding piece 211a is inserted into a cutout window formed in the upper part of the main body piece of the lower element 210, and holds the lower element 210. By soldering the sandwiched portion, the E-net element 211 can be fixed to the lower element 210 and can be electrically connected to each other.
  • the E-net element 211 has a substantially rectangular shape and an enlarged radiating surface to make the directional characteristics in the horizontal plane almost non-directional.
  • the E-net element 211 is formed so that both ends are slightly bent forward, and both corners of the upper edge are cut off. This is for storing the E-net element 211 in a narrow storage space formed by the back surface of the lower element 210 and the wall surface of the cover 202. In addition, such bending or cutting off both corners does not affect the directional characteristics in the horizontal plane.
  • the multi-frequency antenna 200 of the second embodiment of the present invention has a divided D-net element when the antenna element 201 is screwed into the cover portion 202. 2 13 and the lower element 2 10 for the D net are connected. That is, in the multi-frequency antenna 200 of the second embodiment of the present invention, the D-net antenna is an antenna that operates from the circuit board 2 21 to the lower end of the choke coil 2 14. .
  • the E-net antenna is The antenna operates in the range from the plate 2 21 to the upper end of the lower element 210.
  • the antenna for the AM / FM band is an antenna that operates in a range from the circuit board 221 to the antenna top 322. However, it does not resonate in the AM band.
  • FIG. 7 is explained with reference to FIG.
  • FIG. 27 shows the detailed structure of the lower element 210.
  • FIG. 27 (a) is a front view of the lower element 210
  • FIG. 27 (b) is a side view thereof
  • (d) is a bottom view.
  • the lower element 210 is formed into a plate shape by processing a metal plate so that the distal end is bent so that the cross section becomes substantially L-shaped.
  • the bent tip is a connection part 210a, and a screw part 210d into which the connection insertion part 212a is screwed substantially at the center of the connection part 210a.
  • the main body piece 210c extending downward from the edge of the connecting portion 210a is tapered so that the width of the lower end portion is narrowed, and the lower portion of the main body piece 210c is directed to the back side. It is bent by an angle corresponding to the inclination of element 201.
  • a soldering piece 210b to be soldered to the circuit board 221 is formed at the lower end of the main body piece 210c. Further, a part of the upper part of the main body piece 210c is cut out to form a cutout window 210e. In addition, the length of the lower element 210 is formed slightly longer than the length of the lower element 10.
  • FIG. 28 shows a detailed configuration of the E-net element 211, wherein FIG. 28 (a) is a front view of the E-net element 211, and FIG. 28 (b) is a side view thereof.
  • Figure (c) is a bottom view.
  • the E-net element 211 is formed by processing a metal plate so as to have a substantially rectangular enlarged radiation surface. End pieces 2 lid and 2 1 e on both sides are slightly bent forward, and both upper corners are cut off. Furthermore, by extending from the approximate center of the upper side and bending in a U-shape, the connecting piece 2 1 1 f is bent. A piece 2 1 1b is formed. A part of the leading edge of the bent piece 2 11 b is cut and bent to form the holding piece 2 1 a.
  • This holding piece 2 1 1a is inserted so as to straddle the cutout window 2 10e formed in the upper part of the body piece 2 10c of the lower element 2 10c, and the bent piece 2 1 1b
  • the lower element 210 is sandwiched between them.
  • the holding pieces 2 11 a are soldered around the cutout windows 210 e so that the E-net elements 211 can be fixed to the lower element 210 and can be fixed to each other. It will be possible to make an electrical connection.
  • the bending angle of the central piece 2 11 c with respect to the connecting piece 2 1 1 f is about 90 °, and when the E-net element 2 11 is fixed to the lower element 2 10
  • the lower element 210 and the center piece 211c of the E-net element 211 are arranged substantially in parallel.
  • the multi-frequency antenna 200 of the second embodiment of the present invention operates simultaneously as the D-net and E-net of the mobile telephone band and the 4-frequency antenna of the AMZFM band as described above.
  • the GPS signal can be received by a separate GPS unit 222.
  • the equipment for AMZF M band is not provided and the antenna for AM / FM band is unnecessary, it is necessary to store only the D-net element 2 13 in the antenna base 230.
  • the multi-frequency antenna 200 according to the second embodiment of the present invention may be a multi-frequency antenna that operates only on the D-net and the E-net in the antenna element 201 as described above. In this case, of course, the length of the antenna element 201 can be shortened accordingly.
  • FIG. 29 (a) shows a principle antenna configuration of the multi-frequency antenna 20 ° of the second embodiment of the present invention which operates with the D net and the E net.
  • the split D-net antenna has a D-net element 2 13 at the upper part and a lower element 2 1 at the lower part having a length L 12. It is assumed to be 0 and it is a linear antenna of length L 1 1.
  • the antenna for the D net configured in this manner is set up obliquely with the angle from the horizontal plane set to angle 02.
  • An E-net element 2 11 having a length L 13 is connected to a portion where the D-net element 213 and the lower element 210 are connected.
  • the E-net element 211 is separated from the lower element 210 by the length L14 of the connection piece 21 1f described above, and is arranged substantially in parallel.
  • connection piece 21 1 f is connected to an intermediate portion of a D-net antenna composed of the D-net element 213 and the lower element 210.
  • the configuration of this E-net element 211 is as shown in Fig. 28, but its schematic shape is shown in Fig. 29 (b) and (c), forming an enlarged radiating surface.
  • the width of the rectangle is W2.
  • the lower end of the lower element 210 is a feeding point for the D-net antenna and the E-net element 211.
  • the length of the antenna for the D net consisting of the element 213 for the D net and the lower element 210 shown in Fig. 29 is L11
  • the length of the lower element 210 is L12
  • the length of the Enet element 21 is L13
  • the width Wl, the distance L14 between the D-net antenna and the E-net element 21 1 are determined by the frequency and angle 0 2 of the first frequency band of the D-net and the second frequency band of the E-net to be used. It is decided according to.
  • the wavelength at the center frequency 915 MHz of the D net is L 1 (327.87 mm), and the wavelength at the center frequency 1795 M Hz of the E net is ⁇ 2 (1 67 23 mm)
  • the length L 11 of the antenna for the D-net is about 0.221
  • the length L 12 of the lower element 210 is about 0.1 74 X 2, the element 21 1 for the E-net.
  • the length L13 is about 0.120 ⁇ 2
  • its width W2 is about 0.149 ⁇ 2
  • the distance L14 between the D-net antenna and the E-net element 2 11 is about 0.015 52 It can be.
  • the reason why the distance L14 is reduced as described above is that the storage space in the cover portion 202 is reduced, and since the storage space is reduced, the width W2 of the E-net element 21 1 is reduced, and The bending angles of 211 d and 211 e are also tight. However, the length of the D-net antenna and E-net element 21 1 is long. It is going to be.
  • the length and width of the D-net element 2 13, the lower element 210 and the E-net element 211 are different.
  • the impedance characteristic and the VS WR characteristic of the multi-frequency antenna 200 in the frequency band of the D-net and the E-net are represented by the multi-frequency antenna 100 according to the first embodiment. Almost the same characteristics as 0 are obtained.
  • the directional characteristics in the horizontal plane and the directional characteristics in the vertical plane of the multi-frequency antenna 200 in the frequency bands of the D-net and the E-net are the same as those of the multi-frequency antenna 100 according to the first embodiment.
  • the E-net elements 11 and 21 have an enlarged radiation surface of a substantially rectangular shape. Is formed. This is to make the directional characteristics in the horizontal plane almost omnidirectional as described above. However, when omnidirectionality is not required as the directional characteristics in the horizontal plane, the E-net elements 11 1, 2 11 1 May be formed narrower. Also, if the width of the E-net elements 11 and 2 11 is about 0.12 ⁇ 2 or more, the directional characteristics in the horizontal plane will be almost non-directional.
  • a second antenna which is an antenna for a NET is connected to an intermediate portion of a first antenna which is an antenna for a D-net.
  • the reason why the two antennas operate without adversely affecting each other even in this case is that the second antenna operates in a frequency band approximately twice as high as the frequency band in which the first antenna operates. Is also presumed to be related
  • a rectangular enlarged radiating surface operating in the second frequency band higher than the first frequency band is provided at an intermediate portion of the first element operating in the first frequency band.
  • the operating principle is not clear due to such a configuration, even if the first frequency band and the second frequency band are set to a wide frequency band like a mobile telephone band, they operate independently without affecting each other. I will be. Since the radiation surface of the second element is enlarged, the directivity in the horizontal plane can be made almost non-directional.
  • the compact element can be compact. It can be a frequency antenna.
  • a circuit board in which a duplexer or the like is incorporated can be housed in the space inside the cover.
  • a multi-frequency antenna having three or more frequencies can be obtained. Furthermore, even if the GPS antenna unit is provided in the storage space in the cover, the GPS signal can be received without being affected by other antennas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

L'invention concerne une antenne à réseau de discrimination divisé en deux dont un est un élément à réseau de discrimination (D net) (13) dans un élément rayonnant (1) tandis que l'autre élément est contenu, comme élément inférieur (10), dans une section de couverture (2). Un élément E net (11) est connecté à l'extrémité supérieure de l'élément inférieur (10). L'élément E net (11) présente une surface de rayonnement rectangulaire, et donc une non directivité considérable sur le plan horizontal. L'élément rayonnant (1) est fixé amovible à la section de couverture (2), de sorte que l'élément à réseau de discrimination (13) est connecté avec l'élément inférieur (10), ce qui donne une antenne multifréquence fonctionnant sur deux bandes de fréquence larges.
PCT/JP2001/001362 2000-03-17 2001-02-23 Antenne multifrequence Ceased WO2001071847A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE60100492T DE60100492T2 (de) 2000-03-17 2001-02-23 Mehrfrequenzantenne
EP01906261A EP1187253B1 (fr) 2000-03-17 2001-02-23 Antenne multifrequence

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000076164A JP3464639B2 (ja) 2000-03-17 2000-03-17 多周波用アンテナ
JP2000-076164 2000-03-17

Publications (1)

Publication Number Publication Date
WO2001071847A1 true WO2001071847A1 (fr) 2001-09-27

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ID=18593942

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/001362 Ceased WO2001071847A1 (fr) 2000-03-17 2001-02-23 Antenne multifrequence

Country Status (4)

Country Link
EP (1) EP1187253B1 (fr)
JP (1) JP3464639B2 (fr)
DE (1) DE60100492T2 (fr)
WO (1) WO2001071847A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20111229U1 (de) 2001-07-12 2001-10-18 FUBA Automotive GmbH & Co. KG, 31162 Bad Salzdetfurth Antennenanordnung
WO2003071630A1 (fr) * 2002-02-22 2003-08-28 Kathrein-Werke Kg Antenne pour dispositif recepteur et/ou emetteur, en particulier antenne de toit pour vehicules automobiles
US7193572B2 (en) 2002-05-16 2007-03-20 Kathrein-Werke Kg Roof antenna for motor vehicles

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DE60225513T2 (de) * 2001-02-26 2008-06-19 Nippon Antena K.K. Mehrfrequenzantenne
GB2400497B (en) * 2003-04-07 2007-03-21 Harada Ind Multi-band antenna and connectable communication circuitry,for vehicular application
US20040266344A1 (en) * 2003-06-27 2004-12-30 Imtiaz Zafar Integrated AM/FM mast with single SDARS antenna
JP4180526B2 (ja) 2004-01-22 2008-11-12 日産自動車株式会社 アンテナユニット
DE102004046907A1 (de) * 2004-09-28 2006-04-13 Robert Bosch Gmbh Antennengehäuse und Verfahren zur Herstellung eines Antennengehäuses
EP1750327A3 (fr) * 2005-08-01 2007-03-14 Hirschmann Car Communication GmbH Antenne tige, en particuliere une antenne de radiotelephonie mobile pour des véhicule
JP5274102B2 (ja) 2008-05-22 2013-08-28 原田工業株式会社 ２周波アンテナ
US8130155B2 (en) 2008-07-16 2012-03-06 R.A. Miller Industries, Inc. Marine multiband antenna
US8963786B2 (en) * 2012-07-11 2015-02-24 Laird Technologies, Inc. Antenna mast assemblies
EP2883278B1 (fr) * 2012-08-07 2017-11-15 Comrod As Antenne fouet à trois bandes
CN114530698B (zh) * 2016-12-06 2025-02-07 株式会社友华 天线装置
KR102479103B1 (ko) 2017-04-20 2022-12-19 엘에스엠트론 주식회사 차량용 안테나 장치

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JPH08204431A (ja) * 1995-01-23 1996-08-09 N T T Ido Tsushinmo Kk 多共振アンテナ装置
JPH08335824A (ja) * 1995-06-06 1996-12-17 Harada Ind Co Ltd 三波共用アンテナ装置
JPH1168453A (ja) * 1997-08-18 1999-03-09 Uniden Corp 複合アンテナ
JP3058480U (ja) * 1998-10-15 1999-06-18 八重洲無線株式会社 マルチバンド・アンテナ

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JP2730480B2 (ja) * 1993-07-30 1998-03-25 日本アンテナ株式会社 ３波共用ルーフアンテナ
JP3065949B2 (ja) * 1996-09-13 2000-07-17 日本アンテナ株式会社 多周波用アンテナ

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JPS63129308U (fr) * 1987-02-17 1988-08-24
JPH08204431A (ja) * 1995-01-23 1996-08-09 N T T Ido Tsushinmo Kk 多共振アンテナ装置
JPH08335824A (ja) * 1995-06-06 1996-12-17 Harada Ind Co Ltd 三波共用アンテナ装置
JPH1168453A (ja) * 1997-08-18 1999-03-09 Uniden Corp 複合アンテナ
JP3058480U (ja) * 1998-10-15 1999-06-18 八重洲無線株式会社 マルチバンド・アンテナ

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20111229U1 (de) 2001-07-12 2001-10-18 FUBA Automotive GmbH & Co. KG, 31162 Bad Salzdetfurth Antennenanordnung
WO2003071630A1 (fr) * 2002-02-22 2003-08-28 Kathrein-Werke Kg Antenne pour dispositif recepteur et/ou emetteur, en particulier antenne de toit pour vehicules automobiles
DE10207703A1 (de) * 2002-02-22 2003-09-11 Kathrein Werke Kg Empfangs-und Sendeeinrichtung insbesondere als Dachantenne für Kraftfahrzeuge
DE10207703B4 (de) * 2002-02-22 2005-06-09 Kathrein-Werke Kg Antenne für eine Empfangs- und/oder Sendeeinrichtung insbesondere als Dachantenne für Kraftfahrzeuge
US6933899B2 (en) 2002-02-22 2005-08-23 Kathrein Werke Kg Motor and/or transmitting device
CN100459289C (zh) * 2002-02-22 2009-02-04 凯特莱恩工厂股份公司 接收和/或发射装置的天线尤其是汽车的车顶天线
KR101027547B1 (ko) * 2002-02-22 2011-04-06 카트라인-베르케 카게 송수신 장치용 안테나, 특히 차량용 지붕 안테나
US7193572B2 (en) 2002-05-16 2007-03-20 Kathrein-Werke Kg Roof antenna for motor vehicles

Also Published As

Publication number Publication date
DE60100492T2 (de) 2004-02-19
EP1187253B1 (fr) 2003-07-23
EP1187253A1 (fr) 2002-03-13
JP2001267831A (ja) 2001-09-28
DE60100492D1 (de) 2003-08-28
EP1187253A4 (fr) 2002-11-20
JP3464639B2 (ja) 2003-11-10

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