WO2014108977A1 - Appareil d'antenne - Google Patents

Appareil d'antenne Download PDF

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Publication number
WO2014108977A1
WO2014108977A1 PCT/JP2013/007627 JP2013007627W WO2014108977A1 WO 2014108977 A1 WO2014108977 A1 WO 2014108977A1 JP 2013007627 W JP2013007627 W JP 2013007627W WO 2014108977 A1 WO2014108977 A1 WO 2014108977A1
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WO
WIPO (PCT)
Prior art keywords
antenna
antenna element
antenna device
ground conductor
gain
Prior art date
Application number
PCT/JP2013/007627
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English (en)
Japanese (ja)
Inventor
宇野　博之
将之 小幡
朋明 阿部
Original Assignee
パナソニック株式会社
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
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Publication of WO2014108977A1 publication Critical patent/WO2014108977A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/28—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements
    • 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
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • 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
    • H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave
    • 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
    • H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
    • H01Q9/0457—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means electromagnetically coupled to the feed line
    • 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
    • H01Q9/0464—Annular ring patch

Definitions

  • the present invention relates to an antenna device having an antenna pattern that operates at a plurality of frequencies.
  • Various wireless communication systems for example, AM / FM broadcast, terrestrial digital broadcast, GPS, VICS (registered trademark), ETC
  • AM / FM broadcast for example, AM / FM broadcast, terrestrial digital broadcast, GPS, VICS (registered trademark), ETC
  • a plurality of frequencies are used.
  • the performance of the antenna varies in proportion to the volume. Therefore, when the antenna is downsized, a design for improving the antenna performance (for example, gain and efficiency) is required.
  • first and second antenna electrodes are provided on the surface of a dielectric block on a ground conductor, and one surface of the ground conductor is a ground side, and power is supplied to the first and second antenna electrodes.
  • a structure is known in which a feed line to be formed is formed on the other surface of the ground conductor and electrically connected to the feed line via a feed pin inserted at a feed point of each antenna electrode (Patent Document 1).
  • the first antenna electrode can be formed inside the second antenna electrode by making the operating frequency band of the first antenna electrode higher than the operating frequency band of the second antenna electrode.
  • the antenna device can be downsized.
  • a patch conductor is provided on one surface of a dielectric layer, and a ground conductor having a ring-shaped slot formed on the other surface.
  • the antenna performance can be improved while reducing the size of the apparatus by simultaneously feeding power using the L-shaped probe disposed between the patch conductor and the ring-shaped slot.
  • the antenna device described in Patent Document 1 since the first antenna element and the second antenna element are arranged close to each other, the two antenna elements are electromagnetically coupled to each other, As a result, the performance of the antenna element may be deteriorated. Further, in the antenna device described in Patent Document 2, since the patch conductor and the ring-shaped slot formed in the ground conductor are fed simultaneously, it is necessary to arrange the L-type probe with high accuracy, and the configuration of the device becomes complicated. End up. In addition, a reflector is required to increase the gain, and the number of parts increases.
  • the present invention has been made under the above background.
  • the objective of this invention is providing the antenna apparatus which implement
  • An antenna device includes a dielectric substrate, a ground conductor formed on the dielectric substrate, a dielectric block provided on the ground conductor, and formed on the dielectric block.
  • a plurality of L-shaped slits excited in the operating frequency band are formed on the ground conductor.
  • FIG. 1 is a perspective view of an antenna device according to a first embodiment of the present invention.
  • 2 is a plan view of the antenna device of FIG. 3A is a cross-sectional view taken along line AA in FIG. 2
  • FIG. 3B is a cross-sectional view taken along line BB in FIG. 4
  • FIG. 5 is a diagram comparing the antenna gain in the second antenna element by structure.
  • FIG. 6 is an explanatory diagram showing a radiation pattern of the second antenna element in the antenna apparatus of FIG.
  • FIG. 7 is a diagram comparing the antenna gain of the first antenna element by structure.
  • FIG. 8 is an explanatory diagram showing a radiation pattern of the first antenna element in the antenna apparatus of FIG. FIG.
  • FIG. 9 is a perspective view of an antenna device according to the second embodiment of the present invention.
  • 10 is a plan view of the antenna device of FIG.
  • FIG. 11 is a diagram comparing the antenna gain of the second antenna element by structure.
  • 12 is an explanatory diagram showing a radiation pattern of the second antenna element in the antenna device of FIG.
  • FIG. 13 is a diagram comparing the antenna gain of the first antenna element by structure.
  • 14 is an explanatory diagram showing a radiation pattern of the second antenna element in the antenna apparatus of FIG.
  • the antenna device of the present invention includes a dielectric substrate, a ground conductor formed on the dielectric substrate, a dielectric block provided on the ground conductor, and a substantially annular shape formed on the dielectric block.
  • a first antenna element and a second antenna element disposed inside the first antenna element, wherein the first antenna element is electromagnetically coupled to the second antenna element and excited in an operating frequency band of the second antenna element.
  • a plurality of L-shaped slits are formed on the ground conductor.
  • the slit operates as an antenna in the operating frequency band of the second antenna element
  • the second antenna element provided inside the first antenna element without reducing the efficiency of the substantially annular first antenna element.
  • the gain can be improved, and downsizing can be realized while maintaining the performance of the antenna element.
  • the plurality of slits are four slits that are uniformly formed in a central portion of the ground conductor.
  • the dielectric block is disposed at a position covering a part of the slit.
  • the antenna device further includes a plurality of parasitic elements that are arranged at positions away from the first antenna element along the outer periphery of the first antenna element and are excited in an operating frequency band of the second antenna element. It has the composition provided. With this configuration, the gain of the second antenna element can be further improved, and the size can be reduced while maintaining the performance of the antenna element.
  • the plurality of parasitic elements are four rectangular parasitic elements arranged uniformly along the outer periphery of the first antenna element.
  • any one of the parasitic elements is a power feeding element for the first antenna element.
  • FIG. 1 to 3 show an antenna device according to a first embodiment.
  • FIG. 1 is a perspective view
  • FIG. 2 is a plan view
  • FIG. 3 is a sectional view.
  • the antenna device 101 includes a dielectric substrate 102, a ground conductor 103 formed on the substrate 102, a dielectric block 104, a first antenna element 105, and a feeding element 106.
  • the dielectric substrate 102 is, for example, a glass epoxy substrate having a side length Lg and a thickness T, and its relative dielectric constant is 4.5.
  • the ground conductor 103 is formed by a conductor pattern on the upper surface (the surface on the + Z side in FIG. 1) of the dielectric substrate 102 and is electrically grounded.
  • the dielectric block 104 is a substantially rectangular parallelepiped block having a side length Lc and a thickness Tc, and is made of, for example, a dielectric material having a high dielectric constant of ceramic resin.
  • the first antenna element 105 is formed on the upper surface (the surface on the + Z side in FIG. 1) of the dielectric block 104 with, for example, a conductive material (for example, silver plating) having an outer dimension L1a, an element width W1a, and a gap dimension L1b. It has a substantially annular shape surrounding the two antenna elements 107.
  • the diagonal portion of the first antenna element 105 is formed with a right-angled isosceles triangular cutout, which acts as a perturbing element, thereby realizing circularly polarized radiation.
  • the feeding element 106 is formed on the upper surface (the surface on the + Z side) of the dielectric block 104, for example, with a conductive material (for example, silver plating) having a length Lf and a width Wf, and is separated from the first antenna element 105 by a distance S1.
  • the first antenna element 105 is disposed substantially parallel to the position.
  • the power feeding element 106 feeds power from a radio circuit (not shown) formed on the ⁇ Z side surface of the dielectric substrate 102 to the position of the first power feeding point 108 via the first power feeding pin 301 (see FIG. 3). Receive.
  • the power feeding element 106 and the first antenna element 105 are electromagnetically coupled, and the first antenna element 105 is excited.
  • the second antenna element 107 is provided on the upper surface (surface on the + Z side) of the dielectric block 104, and is formed of, for example, a conductive material (for example, silver plating) having an outer dimension L2a.
  • the second antenna element 107 is arranged at a substantially central position in the gap of the first antenna element 105, and a notch of a right-angled isosceles triangle as a perturbation element is formed in the diagonal portion.
  • a conductive material for example, silver plating
  • the second antenna element 107 is connected to the second feeding point via a second feeding pin 302 (see FIG. 3) from a radio circuit (not shown) formed on the lower surface (the ⁇ Z side surface) of the dielectric substrate 102. Power is supplied to position 109 and excited. The position of the second feeding point 109 is determined at a predetermined position in the second antenna element 107 so that impedance matching with the radio circuit can be achieved.
  • the dielectric block 104 is disposed so that the surface (the surface on the ⁇ Z side) opposite to the surface on which the antenna elements 105 and 107 are formed is in contact with the ground conductor 103.
  • the antenna element 105 and the second antenna element 107 operate as a microstrip antenna using the ground conductor 103 as a ground plane, and can realize unidirectional directivity characteristics with the maximum radiation direction as the + Z side.
  • each of the slits 401a to 401d has an L-shape having a length of Ls and a width of Ws, and the interval between adjacent slits is set to Ds.
  • 401d is arranged equally (in a symmetrical position with respect to the center of the ground conductor 103) so as to form a square corner portion.
  • These slits 401a to 401d are appropriately sized so that they operate as parasitic elements at the frequency at which the second antenna element 107 operates, and together with the second antenna element 107, improve the antenna gain in the + Z direction.
  • the dielectric block 104 is arranged on the ground conductor 103 so that the center of the square formed by the L-shaped slits 401a to 401d and the center of the dielectric block 104 coincide with each other.
  • the gain of the second antenna element 107 can be improved without degrading the performance of the element 105.
  • each of the slits 401a to 401d is partially covered by the dielectric block 104, but the present invention is not limited to such a configuration.
  • the antenna gain and radiation pattern of the antenna element having the above configuration were calculated by electromagnetic field simulation and compared with an antenna element having a configuration in which no slit was provided.
  • the dimensions of the antenna device used as the electromagnetic field simulation model are as follows.
  • the first antenna element 105 operates as an antenna element that resonates in the GPS band (1.575 GHz band), and the second antenna element 107 resonates in the DSRC band (5.8 GHz band). Operates as an antenna element.
  • FIG. 5 shows a comparison of the antenna gain of the second antenna element 107 in the 5.8 GHz band for each antenna device structure.
  • (A) is the antenna gain when the second antenna element is single (when the first antenna element and the slit are not provided), and
  • (B) is when the first antenna element is provided (however, the slit is
  • (C) shows the antenna gain in the antenna device according to the present embodiment.
  • “Antenna gain” means directivity gain in the + Z direction.
  • the antenna gain of the second antenna element is reduced by 0.7 dB due to electromagnetic coupling with the first antenna element.
  • FIG. 5C by forming a slit in the ground conductor, the antenna gain of the second antenna element is improved by 1.1 dB compared to the case where the slit is not provided (FIG. 5B). It has been shown. Note that since the antenna element of the present embodiment is configured to have perturbation, the antenna gain in FIG. 5 indicates the gain of right-handed circular polarization.
  • FIG. 6A and 6B are diagrams showing a radiation pattern of the second antenna element of the antenna device according to the present embodiment.
  • FIG. 6A shows a radiation pattern on the XZ plane
  • FIG. 6B shows a radiation pattern on the YZ plane.
  • normalization is performed so that the maximum gain is 0 dB. It can be seen from the radiation pattern of FIG. 6 that in the antenna device according to the present embodiment, unidirectional directivity characteristics radiating in the + Z direction are obtained.
  • the half-value angle of the radiation pattern in the antenna device having the configuration shown in FIG. 5B was 136 degrees on the XZ plane and 126 degrees on the YZ plane. Furthermore, the half-value angle of the radiation pattern in the antenna device having the configuration of FIG. 5A was 106 degrees on the XZ plane and 116 degrees on the YZ plane.
  • FIG. 7 shows a comparison of the antenna gain in the 1.575 GHz band of the first antenna element 105 for each antenna device structure.
  • (A) is the antenna gain when the first antenna element is single (when the second antenna element and slit are not provided), and (B) is the case when the second antenna element is provided (however, the slit is (C) shows the antenna gain in the antenna device according to the present embodiment.
  • “Antenna gain” means directivity gain in the + Z direction.
  • the antenna gain of the first antenna element does not decrease even when the second antenna element is provided or a slit is formed on the ground conductor. This is because the second antenna element and the slit are sufficiently small with respect to the wavelength of the 1.575 GHz band that is the operating frequency of the first antenna element, and these influences hardly occur.
  • FIG. 8A and 8B are diagrams showing a radiation pattern of the first antenna element of the antenna device according to the present embodiment, where FIG. 8A shows a radiation pattern on the XZ plane, and FIG. 8B shows a radiation pattern on the YZ plane. .
  • normalization is performed so that the maximum gain is 0 dB. From the radiation pattern of FIG. 8, it can be seen that the antenna device according to the present embodiment has a unidirectional directional characteristic that radiates in the + Z direction.
  • the half-value angle of the radiation pattern in FIG. 8 was 107 degrees on the XZ plane and 106 degrees on the YZ plane. Further, the half-value angle of the radiation pattern in the antenna device having the configuration of FIG. 7B was 105 degrees on the XZ plane and 106 degrees on the YZ plane. Further, the half-value angle of the radiation pattern in the antenna device having the configuration shown in FIG. 7A was 105 degrees in the XZ plane and 107 degrees in the YZ plane.
  • the L-shaped slits are formed in the ground conductor in a square shape, and the dielectric block in which the first and second antenna elements are formed is disposed on the slits, thereby improving the performance of the first antenna element.
  • the antenna gain of the second antenna element can be improved without deteriorating.
  • FIG. 9 is a perspective view of the antenna device according to the second embodiment
  • FIG. 10 is a plan view.
  • the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the antenna device 901 in this embodiment is different from the antenna device 101 in the first embodiment in that it includes parasitic elements 902a to 902d.
  • the parasitic elements 902a to 902d are formed on the upper surface (the surface on the + Z side) of the dielectric block 104 by, for example, silver plating having a length of Lr and a width of Wr, and a predetermined length from each side of the first antenna element 105. They are arranged along the first antenna element 105, separated by an interval S2.
  • the parasitic element 902a is used as a feeding element for the first antenna element 105, and feeds power from a wireless circuit (not shown) formed on the lower surface (the surface on the ⁇ Z side) of the dielectric substrate 102 via a feeding pin. Power is supplied to the point 903. Accordingly, the first antenna element 105 is excited by the electromagnetic coupling between the first antenna element 105 and the parasitic element 902a. That is, the parasitic element 902a performs the same operation as that of the feeder element 106 of the first embodiment. 9 and 10, the position of the feeding point 903 is illustrated as the center of the parasitic element 902a. However, the present invention is not limited to this, and the position where impedance matching of the first antenna element 105 can be obtained is not limited thereto. That's fine.
  • the parasitic element 902a operates as a parasitic element with respect to the second antenna element 107. That is, when the second antenna element 107 is excited, the parasitic element 902a is excited by being electromagnetically coupled to the second antenna element 107, and operates as an antenna, and as a result, the opening area of the antenna increases. Therefore, the antenna gain in the + Z direction is improved.
  • the other parasitic elements 902b to 902d act so as to improve the antenna gain of the second antenna element 107.
  • the antenna gain and radiation pattern of the antenna device configured as described above were calculated by electromagnetic field simulation and compared with the antenna device according to the first embodiment.
  • the dimensions of the antenna device used as the electromagnetic field simulation model are as follows. The values of other parameters are the same as those described in the first embodiment.
  • the first antenna element 105 operates as an antenna element that resonates in the GPS band (1.575 GHz band), and the second antenna element 107 resonates in the DSRC band (5.8 GHz band). Operates as an antenna element.
  • FIG. 11 shows a comparison of the antenna gain of the second antenna element 107 in the 5.8 GHz band for each antenna device structure.
  • (A) shows the antenna gain of the second antenna element according to the first embodiment
  • (B) shows the antenna gain of the second antenna element according to the present embodiment.
  • “Antenna gain” means directivity gain in the + Z direction. From FIG. 11, it can be seen that by providing four parasitic elements, the antenna gain of the second antenna element is improved by 1.1 dB.
  • FIG. 12A and 12B are diagrams showing a radiation pattern of the second antenna element of the antenna device according to the present embodiment, where FIG. 12A shows a radiation pattern on the XZ plane, and FIG. 12B shows a radiation pattern on the YZ plane. .
  • normalization is performed so that the maximum gain is 0 dB. From the radiation pattern of FIG. 12, it can be seen that the antenna device according to the present embodiment has a unidirectional directional characteristic that radiates in the + Z direction.
  • the half-value angle of the radiation pattern in FIG. 12 was 82 degrees on the XZ plane and 80 degrees on the YZ plane. Further, the half-value angle of the radiation pattern in the antenna device according to the configuration of the first embodiment (configuration of FIG. 11A) was 102 degrees on the XZ plane and 98 degrees on the YZ plane. Thus, in the antenna device according to the present embodiment, it can be seen that the half-value width is reduced as compared with other structures, and the directivity characteristics in the + Z direction are improved.
  • FIG. 13 compares the antenna gain of the first antenna element 105 in the 1.575 GHz band according to the structure of the antenna device.
  • (A) shows the antenna gain of the second antenna element according to the first embodiment
  • (B) shows the antenna gain of the second antenna element according to the present embodiment. From the result of FIG. 13, it can be seen that the antenna gain of the first antenna element does not decrease even when a parasitic element is provided. This is because the parasitic element is sufficiently small with respect to the wavelength of the 1.575 GHz band, which is the operating frequency of the first antenna element, and the influence of the parasitic element hardly occurs.
  • FIG. 14A and 14B are diagrams showing a radiation pattern of the first antenna element of the antenna device according to the present embodiment, where FIG. 14A shows a radiation pattern on the XZ plane, and FIG. 14B shows a radiation pattern on the YZ plane. .
  • normalization is performed so that the maximum gain is 0 dB. From the radiation pattern of FIG. 14, it can be seen that the antenna device according to the present embodiment has a unidirectional directional characteristic that radiates in the + Z direction.
  • the half-value angle of the radiation pattern in FIG. 14 was 106 degrees on the XZ plane and 106 degrees on the YZ plane. Further, the half-value angle of the radiation pattern in the antenna device according to the configuration of the first embodiment (configuration of FIG. 13A) was 107 degrees on the XZ plane and 106 degrees on the YZ plane. Thus, in the antenna device according to the present embodiment, it can be seen that the presence of the parasitic element hardly affects the radiation pattern of the first antenna element.
  • the length of each side of the L-shaped slit is made equal, but it is not always necessary to make it equal, and can be changed as long as it is excited in the operating frequency band of the second antenna element.
  • the angle of the bending part of a slit is a right angle, it does not necessarily need to be a right angle and can be suitably changed as long as it excites in the operating frequency band of a 2nd antenna element.
  • the four slits are formed, the number can be changed suitably.
  • the parasitic parasitic element is provided.
  • the shape is not necessarily limited to the rectangular shape, and the shape is appropriately changed as long as excitation is performed in the operating frequency band of the second antenna element. Can do.
  • the four slits are formed, the number can be changed suitably.
  • each parameter shown in the above embodiment is merely an example, and is not limited to the numerical value described in the above embodiment.
  • the value can be appropriately changed according to the arrangement of the power supply unit and the material and arrangement of components, casings, cables, etc. in the vicinity of the antenna device, thereby improving the radiation efficiency and gain. .
  • the 1.575 GHz band and the 5.8 GHz band are given as examples, but the present invention is not limited to this frequency.
  • the microstrip antenna having the circular polarization characteristic in which the antenna element is perturbed is used.
  • the same effect can be obtained as a microstrip antenna having the linear polarization characteristic without providing the perturbation. be able to.
  • the case where radio waves are transmitted has been described as an example.
  • the present invention can be equally applied to the case where radio waves transmitted from, for example, a radio base station are received.
  • the antenna device according to the present invention has high antenna efficiency and can be applied to, for example, a vehicle-mounted antenna device, and is useful.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Waveguide Aerials (AREA)
  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)

Abstract

La présente invention concerne un appareil d'antenne (101), composé des éléments suivants : un substrat diélectrique (102) ; un conducteur (103) de terre formé sur une surface du substrat diélectrique (102) ; un bloc diélectrique (104), conçu à partir d'un matériau diélectrique ayant une constante diélectrique élevée, comme de la résine céramique ; et un premier élément d'antenne (105) et un second élément d'antenne (107), formés sur un bloc diélectrique (104) au moyen d'un motif conducteur. Le premier élément d'antenne (105) a une forme sensiblement annulaire, de manière à entourer le second élément d'antenne (107). Quatre fentes (401a, 401b, 401c, 401d) en forme de L, constituées par la découpe du motif conducteur sont conçues dans une partie centrale du conducteur (103) de terre. Grâce à cette conception, un gain d'antenne du second élément d'antenne peut être amélioré sans détériorer les performances du premier élément d'antenne, ce qui permet d'obtenir des performances d'antenne élevées.
PCT/JP2013/007627 2013-01-08 2013-12-26 Appareil d'antenne WO2014108977A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-001166 2013-01-08
JP2013001166A JP6004180B2 (ja) 2013-01-08 2013-01-08 アンテナ装置

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WO2014108977A1 true WO2014108977A1 (fr) 2014-07-17

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106487961A (zh) * 2016-12-03 2017-03-08 胡佳培 一种设有屏蔽板的旋转手机
US10826183B2 (en) * 2016-12-29 2020-11-03 Trimble Inc. Circularly polarized antennas

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106856524A (zh) * 2016-12-03 2017-06-16 胡佳培 一种旋转手机

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JP2004096259A (ja) * 2002-08-30 2004-03-25 Matsushita Electric Ind Co Ltd 多周波マイクロストリップアンテナ
JP2005130532A (ja) * 2005-02-08 2005-05-19 Matsushita Electric Ind Co Ltd 複共振型誘電体アンテナ及び車載無線装置
JP2005192165A (ja) * 2003-12-26 2005-07-14 Alps Electric Co Ltd アンテナ装置
JP2008054080A (ja) * 2006-08-25 2008-03-06 Furuno Electric Co Ltd 円偏波パッチアンテナ

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JP4690834B2 (ja) * 2005-09-01 2011-06-01 古河電気工業株式会社 多周波共用アンテナ

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Publication number Priority date Publication date Assignee Title
JP2004096259A (ja) * 2002-08-30 2004-03-25 Matsushita Electric Ind Co Ltd 多周波マイクロストリップアンテナ
JP2005192165A (ja) * 2003-12-26 2005-07-14 Alps Electric Co Ltd アンテナ装置
JP2005130532A (ja) * 2005-02-08 2005-05-19 Matsushita Electric Ind Co Ltd 複共振型誘電体アンテナ及び車載無線装置
JP2008054080A (ja) * 2006-08-25 2008-03-06 Furuno Electric Co Ltd 円偏波パッチアンテナ

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Title
SEIICHI NAKANISHI ET AL.: "A Study of Dual Band Circular Polarization Patch Antenna", IEICE TECHNICAL REPORT, vol. 102, no. 390, pages 41 - 44 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106487961A (zh) * 2016-12-03 2017-03-08 胡佳培 一种设有屏蔽板的旋转手机
US10826183B2 (en) * 2016-12-29 2020-11-03 Trimble Inc. Circularly polarized antennas

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JP6004180B2 (ja) 2016-10-05

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