WO2007052371A1 - Antenna device - Google Patents

Antenna device Download PDF

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Publication number
WO2007052371A1
WO2007052371A1 PCT/JP2006/303565 JP2006303565W WO2007052371A1 WO 2007052371 A1 WO2007052371 A1 WO 2007052371A1 JP 2006303565 W JP2006303565 W JP 2006303565W WO 2007052371 A1 WO2007052371 A1 WO 2007052371A1
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WO
WIPO (PCT)
Prior art keywords
antenna
circularly polarized
tag
antenna device
active wireless
Prior art date
Application number
PCT/JP2006/303565
Other languages
French (fr)
Japanese (ja)
Inventor
Tadashi Sato
Hidenori Horiuchi
Original Assignee
Totoku Electric 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 Totoku Electric Co., Ltd. filed Critical Totoku Electric Co., Ltd.
Publication of WO2007052371A1 publication Critical patent/WO2007052371A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10158—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field
    • G06K7/10178—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field including auxiliary means for focusing, repeating or boosting the electromagnetic interrogation field
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H01Q1/2241—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in or for vehicle tyres
    • 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
    • H01Q19/10—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 reflecting surfaces

Definitions

  • the present invention relates to an antenna device, and more particularly to an antenna device that can receive radio waves of an active wireless IC tag in a wide range.
  • Patent Document 1 Japanese Unexamined Patent Publication No. 2005-23666
  • the conventional gate passage management device has a problem that the communication range of the circularly polarized antenna is narrow!
  • An object of the present invention is to provide an antenna device that can receive radio waves having the power of an active wireless IC tag in a wide range.
  • the present invention provides an antenna device for receiving radio waves from an active wireless IC tag (T), wherein the active wireless IC tag (T) passes through a space (S ), A circularly polarized flat antenna (1) is installed on one side, and a reflector (2 ′) is installed on the other side.
  • the antenna device uses a circularly polarized flat antenna (1). If the directivity of the antenna of T) roughly matches the radio wave reception direction of the circularly polarized flat antenna (1), even if the active wireless IC tag (T) rotates about the reception direction axis, Since the reception gain does not change, stable communication can be performed with less fading. Then, since the reflector (2 ') is installed opposite to the circularly polarized flat antenna (1), the radio waves from the active wireless IC tag (T) reflected by the reflector (2') are also received. Receive It is possible to receive radio waves from the active wireless IC tag (T) over a wide area.
  • the present invention provides the antenna device according to the first aspect, wherein a reflector (2) is also installed on the back side of the circularly polarized flat antenna (1). Provide equipment.
  • the reflector (2) since the reflector (2) is also installed on the back side of the circularly polarized flat antenna (1), it is reflected by the reflector (2) and further reflected by the reflector (2 Radio waves from the active wireless IC tag (T) reflected by ') can be received, and radio waves from the active wireless IC tag (T) can be received over a wide range.
  • the present invention provides the antenna device according to the first or second aspect, wherein two or more circularly polarized planes are provided in a direction in which the active wireless IC tag (T) passes.
  • an antenna device characterized in that antennas (1, 1,) are installed side by side.
  • the active wireless IC tag since two or more circularly polarized flat antennas (1, 1 ') are arranged side by side in the direction in which the active wireless IC tag (T) passes, the active wireless IC tag The receivable range can be expanded in the direction in which (T) passes. In addition, it is possible to detect the passing direction of the active wireless IC tag (T) and whether or not it has passed through the order in which radio waves are received by two or more circularly polarized planar antennas (1, 1 '). In addition, the results received by two or more circularly polarized planar antennas (1, 1 ') can be compared, improving reliability.
  • the present invention provides the antenna device according to the first or the second aspect, wherein two or more of the above-described directions cross the direction in which the active wireless IC tag (T) passes.
  • two or more circularly polarized flat antennas (1, 1 ') are arranged side by side in a direction intersecting with the direction in which the active wireless IC tag (T) passes.
  • the receivable range in the direction crossing the direction in which the active wireless IC tag (T) passes can be expanded.
  • the results received by two or more circularly polarized planar antennas (1, 1 ') can be compared, improving reliability.
  • the present invention is directed to receiving radio waves from an active wireless IC tag (T).
  • Antenna device a pair of circularly polarized flat antennas (1, 1 ') are placed facing each other across the space (S) through which the active wireless IC tag (T) passes, and each circularly polarized wave
  • an antenna device characterized in that a reflector (2, 2 ') is installed on the back side of a planar antenna (1, 1').
  • the antenna device uses the circularly polarized flat antenna (1, 1 ').
  • the antenna device is worn on the chest of the owner or suspended from the neck. If the directivity of the antenna of the IC tag (T) roughly matches the radio wave reception direction of the circularly polarized flat antenna (1, 1 '), the active radio IC tag (T ) Rotates, the reception gain does not change, fading does not easily occur and stable communication can be performed.
  • a pair of circularly polarized planar antennas (1, 1 ') are placed facing each other across the space (S) through which the active wireless IC tag (T) passes, and each circularly polarized planar antenna (1, 1) is placed.
  • the results received by the pair of circularly polarized planar antennas (1, 1 ') can be compared, improving reliability.
  • the present invention provides an antenna device for receiving radio waves from an active wireless IC tag (T), sandwiching a space (S) through which the active wireless IC tag (T) passes.
  • the first circularly polarized flat antenna (1) is installed on one side, and the second circularly polarized antenna is shifted to the installation position on the opposite side in the direction in which the active wireless IC tag (T) passes.
  • a wave plane antenna (1 ') is installed and a reflector (2, 2') is installed on the back side of each circularly polarized flat antenna (1, 1 ').
  • the antenna device since two circularly polarized planar antennas (1, 1 ') are installed in the direction in which the active wireless IC tag (T) passes, Can extend the receivable range in the direction that the type wireless IC tag (T) passes. In addition, it is possible to detect the passing direction of the active wireless IC tag (T) and whether or not it has passed through the order in which radio waves are received by the two circularly polarized flat antennas (1, 1 ′). In addition, the results received by the two circularly polarized flat antennas (1, 1 ') can be compared, improving reliability. wear.
  • the present invention provides the antenna device according to the sixth aspect, wherein the
  • the second circularly polarized planar antenna (1 ′) is tilted toward the first circularly polarized planar antenna (1 ′).
  • an antenna device that is tilted toward the wave plane antenna (1).
  • the results of simultaneous reception can be compared by creating an overlap portion in the receivable range of the two circularly polarized flat antennas (1, 1 '). Reliability can be improved.
  • the present invention is characterized in that two or more antenna devices according to the second to seventh aspects are arranged and the reflectors (21, 22) between adjacent antenna devices are shared. An antenna device is provided.
  • two or more spaces (S) through which the active wireless IC tag (T) passes can be provided in parallel.
  • the configuration can be simplified by sharing the reflectors (21, 22) between adjacent antenna devices.
  • the antenna device of the present invention it is possible to receive radio waves from an active wireless IC tag in a wide range.
  • FIG. 1A is a plan view of the antenna device 10 according to the first embodiment.
  • FIG. 1B is a front view of the antenna device 10.
  • This antenna device 10 has a configuration in which a circularly polarized flat antenna 1 is installed on one side and a reflector 2 ′ is installed on the opposite side across a space S through which an active wireless IC tag T passes.
  • the circularly polarized wave planar antenna 1 has a square receiving surface of lm X lm, and is supported by the support column 3 so that the height of the center portion becomes the floor force lm.
  • Reflector 2 ' is a metal plate that reflects the UHF radio wave emitted by active wireless IC tag T Or a resin board with a conductive film or a wire mesh board. The height is 2m and the length is 5m.
  • the directivity of the antenna of the active wireless IC tag T is approximately the same as the radio wave reception direction of the circularly polarized flat antenna 1. Then, even if the active wireless IC tag T rotates with respect to the reception direction axis, the reception gain does not change, so that stable communication that is difficult to cause fading can be performed. And since the reflector 2 'is installed facing the circularly polarized flat antenna 1, radio waves from the active wireless IC tag T reflected by the reflector 2' can be received, and in a wide range. Radio waves from active wireless IC tag T can be received.
  • FIG. 2A is a plan view showing the antenna device 20 according to the second embodiment.
  • FIG. 2B is a front view of the antenna device 20.
  • the antenna device 20 includes a circular polarization plane antenna 1 on one side, a circular polarization plane antenna 1 on the other side, and a circular polarization plane antenna 1 on the other side across the space S through which the active wireless IC tag T passes.
  • a reflector 2 is installed on the back side of 1.
  • the reflection plate 2 is also installed on the back side of the circularly polarized flat antenna 1, the active wireless IC tag is reflected by the reflection plate 2 and further reflected by the reflection plate 2 '. Can receive radio waves from the active wireless IC tag T over a wide range. In addition, there is an effect that the reflectors 2 and 2 'block the interference wave of space S external force.
  • FIG. 3A is a plan view of the antenna device 30 according to the third embodiment.
  • FIG. 2 is a front view of the antenna device 30.
  • This antenna device 30 has two circularly polarized flat antennas 1 and 1 ′ arranged on one side of the space S through which the active wireless IC tag T passes and arranged in the direction in which the active wireless IC tag T passes,
  • the reflector 2 ' is installed on the opposite side, and the reflector 2 is installed on the back of the circularly polarized flat antennas 1, 1'.
  • the antenna device 30 since the circularly polarized flat antennas 1, 1 'are arranged side by side in the direction in which the active wireless IC tag T passes, the active wireless IC tag T passes.
  • the receivable range can be expanded in the direction.
  • FIG. 4A is a plan view of the antenna device 40 according to the fourth embodiment.
  • FIG. 4B is a front view of the antenna device 40.
  • two circularly polarized flat antennas 1, 1 ' are arranged side by side on one side across a space S through which an active wireless IC tag T passes, and a reflector 2' is installed on the opposite side.
  • the reflector 2 is installed on the back side of the circularly polarized flat antenna 1, 1 '.
  • the antenna device 40 since the circularly polarized flat antennas 1, 1 'are arranged in the vertical direction, the receivable range can be expanded in the vertical direction. In addition, it is possible to compare the results received by the circularly polarized planar antennas 1, 1 'and improve the reliability.
  • FIG. 5A is a plan view of the antenna device 50 according to the fifth embodiment.
  • FIG. 5B is a front view of the antenna device 50.
  • This antenna device 50 is installed with a pair of circularly polarized planar antennas 1, 1 ′ facing each other across a space S through which an active wireless IC tag T passes, and the back of each circularly polarized planar antenna 1, 1 ′.
  • the reflectors 2 and 2 ' are installed on the side.
  • a pair of circularly polarized planar antennas 1, 1 ' are placed facing each other across the space S through which the active wireless IC tag T passes, and each circularly polarized planar antenna 1 , 1 'reflectors 2 and 2' are installed on the back side, so that the circularly polarized flat antennas 1, 1 'can receive radio waves from the active RFID tag T reflected by the reflectors 2 and 2'. It can receive radio waves from the active wireless IC tag T over a wide range. Furthermore, the results received by the pair of circularly polarized planar antennas 1, 1 'can be compared, and the reliability can be improved.
  • FIG. 6A is a plan view of the antenna device 60 according to the sixth embodiment.
  • FIG. 6B is a front view of the antenna device 60.
  • the first circularly polarized flat antenna 1 is installed on one side across the space S through which the active wireless IC tag T passes, and the active wireless IC tag T passes on the opposite side.
  • the second circularly polarized planar antenna 1 ' is installed at the installation position shifted in the direction, and the reflectors 2, 2' are installed on the back side of each circularly polarized planar antenna 1, 1 '.
  • the circularly polarized flat antenna 1 is tilted toward the second circularly polarized planar antenna 1 ′ and the second circularly polarized planar antenna 1 ′ is tilted toward the first circularly polarized planar antenna 1.
  • the active wireless IC tag T can extend the receivable range in the direction in which.
  • the results of simultaneous reception can be compared, improving reliability.
  • FIG. 7A is a plan view of the antenna device 70 according to the seventh embodiment.
  • FIG. 2 is a front view of the antenna device 70.
  • the antenna device 70 has a configuration in which two or more antenna devices 20 according to the second embodiment are arranged and the reflectors 21 and 22 between adjacent antenna devices are shared.
  • the antenna device 70 two or more spaces S through which the active wireless IC tag T passes can be provided in parallel.
  • the configuration can be simplified by sharing the reflectors 21 and 22 between adjacent antenna devices.
  • Two or more antenna devices 30 to 60 according to the third to sixth embodiments may be arranged, and a reflector between adjacent antenna devices may be shared.
  • the antenna device of the present invention is suitable for a gate passage management device.
  • FIG. 1 is a plan view and a front view showing an antenna device according to a first embodiment.
  • FIG. 2 is a plan view and a front view showing an antenna apparatus according to a second embodiment.
  • FIG. 3 is a plan view and a front view showing an antenna apparatus according to a third embodiment.
  • FIG. 4 is a plan view and a front view showing an antenna apparatus according to a fourth embodiment.
  • FIG. 5 is a plan view and a front view showing an antenna apparatus according to a fifth embodiment.
  • FIG. 6 is a plan view and a front view showing an antenna apparatus according to a sixth embodiment.
  • FIG. 7 is a plan view and a front view showing an antenna apparatus according to a seventh embodiment. Explanation of symbols

Abstract

A circular polarized planar antenna (1) is arranged on one side and a reflecting plate (2’) is arranged on the other side, by having in between a space (S) wherein an active wireless IC tag (T) passes through. An antenna device can receive even radio waves from the active wireless IC tag (T) reflected by the reflecting plate (2’), and the radio waves from the active wireless IC tag (T) can be received in a wide range.

Description

明 細 書  Specification
アンテナ装置  Antenna device
技術分野  Technical field
[0001] 本発明は、アンテナ装置に関し、さらに詳しくは、広い範囲でアクティブ型無線 ICタ ダカもの電波を受信することが出来るアンテナ装置に関する。  TECHNICAL FIELD [0001] The present invention relates to an antenna device, and more particularly to an antenna device that can receive radio waves of an active wireless IC tag in a wide range.
背景技術  Background art
[0002] 従来、マイクロ波 ICカードと通信するために円偏波アンテナを使ったゲート通過管 理装置が知られている (例えば、特許文献 1参照。 ) o  Conventionally, a gate-pass management device using a circularly polarized antenna to communicate with a microwave IC card is known (see, for example, Patent Document 1).
特許文献 1：特開 2005 - 23666号公報  Patent Document 1: Japanese Unexamined Patent Publication No. 2005-23666
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0003] 上記従来のゲート通過管理装置では、円偏波アンテナの通信可能範囲が狭!、と 、 う問題点があった。 [0003] The conventional gate passage management device has a problem that the communication range of the circularly polarized antenna is narrow!
そこで、本発明の目的は、広い範囲でアクティブ型無線 ICタグ力もの電波を受信す ることが出来るアンテナ装置を提供することにある。  SUMMARY OF THE INVENTION An object of the present invention is to provide an antenna device that can receive radio waves having the power of an active wireless IC tag in a wide range.
課題を解決するための手段  Means for solving the problem
[0004] 第 1の観点では、本発明は、アクティブ型無線 ICタグ (T)からの電波を受信するた めのアンテナ装置であって、アクティブ型無線 ICタグ (T)が通過する空間（S)を挟ん で一方側に円偏波平面アンテナ（1)を設置し、反対側に反射板 (2' )を設置したこと を特徴とするアンテナ装置を提供する。 [0004] In a first aspect, the present invention provides an antenna device for receiving radio waves from an active wireless IC tag (T), wherein the active wireless IC tag (T) passes through a space (S ), A circularly polarized flat antenna (1) is installed on one side, and a reflector (2 ′) is installed on the other side.
上記第 1の観点によるアンテナ装置では、円偏波平面アンテナ（1)を使うため、例 えば、所持者の胸部に着用したり、首から吊り下げて利用することにより、アクティブ 型無線 ICタグ (T)のアンテナの指向性が円偏波平面アンテナ（1)の電波の受信方 向に対して概略一致して 、れば、受信方向軸に関してアクティブ型無線 ICタグ (T) が回転しても受信利得が変化しないためフェージングが生じにくぐ安定した通信を 行うことが出来る。そして、円偏波平面アンテナ（1)に対向して反射板 (2' )を設置し て ヽるため、反射板（2' )で反射したアクティブ型無線 ICタグ (T)からの電波をも受信 でき、広 、範囲でアクティブ型無線 ICタグ (T)からの電波を受信することが出来る。 The antenna device according to the first aspect uses a circularly polarized flat antenna (1). If the directivity of the antenna of T) roughly matches the radio wave reception direction of the circularly polarized flat antenna (1), even if the active wireless IC tag (T) rotates about the reception direction axis, Since the reception gain does not change, stable communication can be performed with less fading. Then, since the reflector (2 ') is installed opposite to the circularly polarized flat antenna (1), the radio waves from the active wireless IC tag (T) reflected by the reflector (2') are also received. Receive It is possible to receive radio waves from the active wireless IC tag (T) over a wide area.
[0005] 第 2の観点では、本発明は、前記第 1の観点によるアンテナ装置において、前記円 偏波平面アンテナ（1)の裏側にも反射板 (2)を設置したことを特徴とするアンテナ装 置を提供する。 [0005] In a second aspect, the present invention provides the antenna device according to the first aspect, wherein a reflector (2) is also installed on the back side of the circularly polarized flat antenna (1). Provide equipment.
上記第 2の観点によるアンテナ装置では、円偏波平面アンテナ（1)の裏側にも反射 板 (2)を設置して!/ヽるため、反射板 (2)で反射し更に反射板 (2' )で反射したァクティ ブ型無線 ICタグ (T)からの電波をも受信でき、広 、範囲でアクティブ型無線 ICタグ（ T)からの電波を受信することが出来る。  In the antenna device according to the second aspect, since the reflector (2) is also installed on the back side of the circularly polarized flat antenna (1), it is reflected by the reflector (2) and further reflected by the reflector (2 Radio waves from the active wireless IC tag (T) reflected by ') can be received, and radio waves from the active wireless IC tag (T) can be received over a wide range.
[0006] 第 3の観点では、本発明は、前記第 1または前記第 2の観点によるアンテナ装置に おいて、アクティブ型無線 ICタグ (T)が通過する方向に 2以上の前記円偏波平面ァ ンテナ（1, 1， )を並べて設置したことを特徴とするアンテナ装置を提供する。 [0006] In a third aspect, the present invention provides the antenna device according to the first or second aspect, wherein two or more circularly polarized planes are provided in a direction in which the active wireless IC tag (T) passes. Provided is an antenna device characterized in that antennas (1, 1,) are installed side by side.
上記第 3の観点によるアンテナ装置では、アクティブ型無線 ICタグ (T)が通過する 方向に 2以上の円偏波平面アンテナ（1, 1 ' )を並べて設置しているため、アクティブ 型無線 ICタグ (T)が通過する方向に受信可能範囲を広げることが出来る。また、 2以 上の円偏波平面アンテナ（1, 1 ' )で電波を受信する順序により、アクティブ型無線 IC タグ (T)の通過方向および通過した力否かを検出可能になる。さらに、 2以上の円偏 波平面アンテナ（1, 1 ' )で受信した結果の比較を行うことができ、信頼性を向上でき る。  In the antenna device according to the third aspect, since two or more circularly polarized flat antennas (1, 1 ') are arranged side by side in the direction in which the active wireless IC tag (T) passes, the active wireless IC tag The receivable range can be expanded in the direction in which (T) passes. In addition, it is possible to detect the passing direction of the active wireless IC tag (T) and whether or not it has passed through the order in which radio waves are received by two or more circularly polarized planar antennas (1, 1 '). In addition, the results received by two or more circularly polarized planar antennas (1, 1 ') can be compared, improving reliability.
[0007] 第 4の観点では、本発明は、前記第 1または前記第 2の観点によるアンテナ装置に おいて、アクティブ型無線 ICタグ (T)が通過する方向と交差する方向に 2以上の前記 円偏波平面アンテナ（1, 1 ' )を並べて設置したことを特徴とするアンテナ装置を提供 する。  [0007] In a fourth aspect, the present invention provides the antenna device according to the first or the second aspect, wherein two or more of the above-described directions cross the direction in which the active wireless IC tag (T) passes. Provide an antenna device characterized by circularly polarized planar antennas (1, 1 ') installed side by side.
上記第 4の観点によるアンテナ装置では、アクティブ型無線 ICタグ (T)が通過する 方向と交差する方向に 2以上の円偏波平面アンテナ（ 1 , 1 ' )を並べて設置して 、る ため、アクティブ型無線 ICタグ (T)が通過する方向に交差する方向の受信可能範囲 を広げることが出来る。さらに、 2以上の円偏波平面アンテナ（1, 1 ' )で受信した結果 の比較を行うことができ、信頼性を向上できる。  In the antenna device according to the fourth aspect, two or more circularly polarized flat antennas (1, 1 ') are arranged side by side in a direction intersecting with the direction in which the active wireless IC tag (T) passes. The receivable range in the direction crossing the direction in which the active wireless IC tag (T) passes can be expanded. In addition, the results received by two or more circularly polarized planar antennas (1, 1 ') can be compared, improving reliability.
[0008] 第 5の観点では、本発明は、アクティブ型無線 ICタグ (T)からの電波を受信するた めのアンテナ装置であって、アクティブ型無線 ICタグ (T)が通過する空間（S)を挟ん で一対の円偏波平面アンテナ（1, 1')を対向させて設置し、各円偏波平面アンテナ (1, 1')の裏側に反射板 (2, 2')を設置したことを特徴とするアンテナ装置を提供す る。 [0008] In a fifth aspect, the present invention is directed to receiving radio waves from an active wireless IC tag (T). Antenna device, a pair of circularly polarized flat antennas (1, 1 ') are placed facing each other across the space (S) through which the active wireless IC tag (T) passes, and each circularly polarized wave Provided is an antenna device characterized in that a reflector (2, 2 ') is installed on the back side of a planar antenna (1, 1').
上記第 5の観点によるアンテナ装置では、円偏波平面アンテナ（1, 1')を使うため 、例えば、所持者の胸部に着用したり、首から吊り下げて利用することにより、ァクティ ブ型無線 ICタグ (T)のアンテナの指向性が円偏波平面アンテナ（ 1 , 1 ' )の電波の受 信方向に対して概略一致して 、れば、受信方向軸に関してアクティブ型無線 ICタグ (T)が回転しても受信利得が変化しないためフェージングが生じにくぐ安定した通 信を行うことが出来る。そして、アクティブ型無線 ICタグ (T)が通過する空間（S)を挟 んで一対の円偏波平面アンテナ（1, 1')を対向させて設置し、各円偏波平面アンテ ナ（1, 1')の裏側に反射板 (2, 2')を設置しているため、反射板 (2, 2')で反射した アクティブ型無線 ICタグ (T)からの電波を円偏波平面アンテナ（1, 1 ' )で受信でき、 広い範囲でアクティブ型無線 ICタグ (T)からの電波を受信することが出来る。さらに、 一対の円偏波平面アンテナ（1, 1')で受信した結果の比較を行うことができ、信頼性 を向上できる。  The antenna device according to the fifth aspect uses the circularly polarized flat antenna (1, 1 '). For example, the antenna device is worn on the chest of the owner or suspended from the neck. If the directivity of the antenna of the IC tag (T) roughly matches the radio wave reception direction of the circularly polarized flat antenna (1, 1 '), the active radio IC tag (T ) Rotates, the reception gain does not change, fading does not easily occur and stable communication can be performed. A pair of circularly polarized planar antennas (1, 1 ') are placed facing each other across the space (S) through which the active wireless IC tag (T) passes, and each circularly polarized planar antenna (1, 1) is placed. Since the reflector (2, 2 ') is installed on the back side of 1'), the radio wave from the active wireless IC tag (T) reflected by the reflector (2, 2 ') 1, 1 ') and can receive radio waves from active wireless IC tags (T) over a wide range. In addition, the results received by the pair of circularly polarized planar antennas (1, 1 ') can be compared, improving reliability.
第 6の観点では、本発明は、アクティブ型無線 ICタグ (T)からの電波を受信するた めのアンテナ装置であって、アクティブ型無線 ICタグ (T)が通過する空間（S)を挟ん で一方側に第 1の円偏波平面アンテナ（1)を設置し、反対側であってアクティブ型無 線 ICタグ (T)が通過する方向に位置をずらせた設置位置に第 2の円偏波平面アンテ ナ（1')を設置し、各円偏波平面アンテナ（1, 1')の裏側に反射板 (2, 2')を設置し たことを特徴とするアンテナ装置を提供する。  In a sixth aspect, the present invention provides an antenna device for receiving radio waves from an active wireless IC tag (T), sandwiching a space (S) through which the active wireless IC tag (T) passes. The first circularly polarized flat antenna (1) is installed on one side, and the second circularly polarized antenna is shifted to the installation position on the opposite side in the direction in which the active wireless IC tag (T) passes. A wave plane antenna (1 ') is installed and a reflector (2, 2') is installed on the back side of each circularly polarized flat antenna (1, 1 ').
上記第 6の観点によるアンテナ装置では、アクティブ型無線 ICタグ (T)が通過する 方向に位置をずらせて 2つの円偏波平面アンテナ（1, 1')を設置しているため、ァク ティブ型無線 ICタグ (T)が通過する方向に受信可能範囲を広げることが出来る。また 、 2つの円偏波平面アンテナ（1, 1')で電波を受信する順序により、アクティブ型無 線 ICタグ (T)の通過方向および通過した力否かを検出可能になる。さらに、 2つの円 偏波平面アンテナ（1, 1')で受信した結果の比較を行うことができ、信頼性を向上で きる。 In the antenna device according to the sixth aspect described above, since two circularly polarized planar antennas (1, 1 ') are installed in the direction in which the active wireless IC tag (T) passes, Can extend the receivable range in the direction that the type wireless IC tag (T) passes. In addition, it is possible to detect the passing direction of the active wireless IC tag (T) and whether or not it has passed through the order in which radio waves are received by the two circularly polarized flat antennas (1, 1 ′). In addition, the results received by the two circularly polarized flat antennas (1, 1 ') can be compared, improving reliability. wear.
[0010] 第 7の観点では、本発明は、前記第 6の観点によるアンテナ装置において、前記第 [0010] In a seventh aspect, the present invention provides the antenna device according to the sixth aspect, wherein the
1の円偏波平面アンテナ（1)を前記第 2の円偏波平面アンテナ（1 ' )側に傾けると共 に前記第 2の円偏波平面アンテナ（1 ' )を前記第 1の円偏波平面アンテナ（1)側に傾 けたことを特徴とするアンテナ装置を提供する。 When the circularly polarized planar antenna (1) of 1 is tilted toward the second circularly polarized planar antenna (1 ′), the second circularly polarized planar antenna (1 ′) is tilted toward the first circularly polarized planar antenna (1 ′). Provided is an antenna device that is tilted toward the wave plane antenna (1).
上記第 7の観点によるアンテナ装置では、 2つの円偏波平面アンテナ（1, 1 ' )の受 信可能範囲にオーバラップ部分を作ることにより、同時受信した結果の比較を行うこ とができ、信頼性を向上できる。  In the antenna device according to the seventh aspect described above, the results of simultaneous reception can be compared by creating an overlap portion in the receivable range of the two circularly polarized flat antennas (1, 1 '). Reliability can be improved.
[0011] 第 8の観点では、本発明は、前記第 2から前記第 7の観点によるアンテナ装置を 2 以上並べると共に隣接するアンテナ装置間の反射板 (21, 22)は共用としたことを特 徴とするアンテナ装置を提供する。 [0011] In an eighth aspect, the present invention is characterized in that two or more antenna devices according to the second to seventh aspects are arranged and the reflectors (21, 22) between adjacent antenna devices are shared. An antenna device is provided.
上記第 8の観点によるアンテナ装置では、アクティブ型無線 ICタグ (T)が通過する 空間（S)を 2以上並列に設けることが出来る。また、隣接するアンテナ装置間の反射 板 (21, 22)を共用することで構成を簡単ィ匕できる。  In the antenna device according to the eighth aspect, two or more spaces (S) through which the active wireless IC tag (T) passes can be provided in parallel. In addition, the configuration can be simplified by sharing the reflectors (21, 22) between adjacent antenna devices.
発明の効果  The invention's effect
[0012] 本発明のアンテナ装置によれば、広い範囲でアクティブ型無線 ICタグからの電波 を受信することが出来る。  [0012] According to the antenna device of the present invention, it is possible to receive radio waves from an active wireless IC tag in a wide range.
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0013] 以下、図に示す実施の形態により本発明をさらに詳細に説明する。なお、これによ り本発明が限定されるものではない。 Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings. However, this does not limit the present invention.
実施例 1  Example 1
[0014] 図 1の（a)は、実施例 1にかかるアンテナ装置 10を示す平面図である。図 1の（b)は 、アンテナ装置 10の正面図である。  FIG. 1A is a plan view of the antenna device 10 according to the first embodiment. FIG. 1B is a front view of the antenna device 10.
このアンテナ装置 10は、アクティブ型無線 ICタグ Tが通過する空間 Sを挟んで一方 側に円偏波平面アンテナ 1を設置し、反対側に反射板 2'を設置した構成である。  This antenna device 10 has a configuration in which a circularly polarized flat antenna 1 is installed on one side and a reflector 2 ′ is installed on the opposite side across a space S through which an active wireless IC tag T passes.
[0015] 円偏波平面アンテナ 1は、 lm X lmの正方形の受信面を有し、中心部の高さが床 力 lmになるように支柱 3で支持されて 、る。 [0015] The circularly polarized wave planar antenna 1 has a square receiving surface of lm X lm, and is supported by the support column 3 so that the height of the center portion becomes the floor force lm.
反射板 2'は、アクティブ型無線 ICタグ Tが発する UHF帯の電波を反射する金属板 や、導電性を有するフィルムを貼った榭脂板や、金網板である。高さは 2m、長さは 5 mである。 Reflector 2 'is a metal plate that reflects the UHF radio wave emitted by active wireless IC tag T Or a resin board with a conductive film or a wire mesh board. The height is 2m and the length is 5m.
[0016] アンテナ装置 10によれば、円偏波平面アンテナ 1を使うため、アクティブ型無線 IC タグ Tのアンテナの指向性が円偏波平面アンテナ 1の電波の受信方向に対して概略 一致して 、れば、受信方向軸に関してアクティブ型無線 ICタグ Tが回転しても受信利 得が変化しないためフェージングが生じにくぐ安定した通信を行うことが出来る。そ して、円偏波平面アンテナ 1に対向して反射板 2'を設置しているため、反射板 2'で 反射したアクティブ型無線 ICタグ Tからの電波をも受信でき、広 、範囲でアクティブ 型無線 ICタグ Tからの電波を受信することが出来る。  [0016] According to the antenna device 10, since the circularly polarized flat antenna 1 is used, the directivity of the antenna of the active wireless IC tag T is approximately the same as the radio wave reception direction of the circularly polarized flat antenna 1. Then, even if the active wireless IC tag T rotates with respect to the reception direction axis, the reception gain does not change, so that stable communication that is difficult to cause fading can be performed. And since the reflector 2 'is installed facing the circularly polarized flat antenna 1, radio waves from the active wireless IC tag T reflected by the reflector 2' can be received, and in a wide range. Radio waves from active wireless IC tag T can be received.
実施例 2  Example 2
[0017] 図 2の（a)は、実施例 2にかかるアンテナ装置 20を示す平面図である。図 2の（b)は 、アンテナ装置 20の正面図である。  FIG. 2A is a plan view showing the antenna device 20 according to the second embodiment. FIG. 2B is a front view of the antenna device 20.
このアンテナ装置 20は、アクティブ型無線 ICタグ Tが通過する空間 Sを挟んで一方 側に円偏波平面アンテナ 1を設置し、反対側に反射板 2'を設置し、円偏波平面アン テナ 1の裏側に反射板 2を設置した構成である。  The antenna device 20 includes a circular polarization plane antenna 1 on one side, a circular polarization plane antenna 1 on the other side, and a circular polarization plane antenna 1 on the other side across the space S through which the active wireless IC tag T passes. In this configuration, a reflector 2 is installed on the back side of 1.
[0018] アンテナ装置 20によれば、円偏波平面アンテナ 1の裏側にも反射板 2を設置してい るため、反射板 2で反射し更に反射板 2'で反射したアクティブ型無線 ICタグ丁からの 電波をも受信でき、広 、範囲でアクティブ型無線 ICタグ Tからの電波を受信すること が出来る。また、空間 S外力もの妨害電波を反射板 2, 2'が遮る効果もある。  [0018] According to the antenna device 20, since the reflection plate 2 is also installed on the back side of the circularly polarized flat antenna 1, the active wireless IC tag is reflected by the reflection plate 2 and further reflected by the reflection plate 2 '. Can receive radio waves from the active wireless IC tag T over a wide range. In addition, there is an effect that the reflectors 2 and 2 'block the interference wave of space S external force.
実施例 3  Example 3
[0019] 図 3の（a)は、実施例 3にかかるアンテナ装置 30を示す平面図である。図 3の（b)は FIG. 3A is a plan view of the antenna device 30 according to the third embodiment. Figure 3 (b)
、アンテナ装置 30の正面図である。 2 is a front view of the antenna device 30. FIG.
このアンテナ装置 30は、アクティブ型無線 ICタグ Tが通過する空間 Sを挟んで一方 側に 2つの円偏波平面アンテナ 1, 1 'をアクティブ型無線 ICタグ Tが通過する方向に 並べて設置し、反対側に反射板 2'を設置し、円偏波平面アンテナ 1, 1 'の裏側に反 射板 2を設置した構成である。  This antenna device 30 has two circularly polarized flat antennas 1 and 1 ′ arranged on one side of the space S through which the active wireless IC tag T passes and arranged in the direction in which the active wireless IC tag T passes, The reflector 2 'is installed on the opposite side, and the reflector 2 is installed on the back of the circularly polarized flat antennas 1, 1'.
[0020] アンテナ装置 30によれば、アクティブ型無線 ICタグ Tが通過する方向に円偏波平 面アンテナ 1, 1 'を並べて設置しているため、アクティブ型無線 ICタグ Tが通過する 方向に受信可能範囲を広げることが出来る。また、円偏波平面アンテナ 1, 1 'で電波 を受信する順序により、アクティブ型無線 ICタグ Tの通過方向および通過したカゝ否か を検出可能になる。さらに、円偏波平面アンテナ 1, 1 'で受信した結果の比較を行う ことができ、信頼性を向上できる。 [0020] According to the antenna device 30, since the circularly polarized flat antennas 1, 1 'are arranged side by side in the direction in which the active wireless IC tag T passes, the active wireless IC tag T passes. The receivable range can be expanded in the direction. In addition, it is possible to detect the passing direction of the active wireless IC tag T and whether it has passed or not by the order of receiving the radio waves by the circularly polarized flat antennas 1, 1 ′. In addition, it is possible to compare the results received by the circularly polarized flat antennas 1, 1 'and improve the reliability.
実施例 4  Example 4
[0021] 図 4の（a)は、実施例 4にかかるアンテナ装置 40を示す平面図である。図 4の（b)は 、アンテナ装置 40の正面図である。  FIG. 4A is a plan view of the antenna device 40 according to the fourth embodiment. FIG. 4B is a front view of the antenna device 40.
このアンテナ装置 40は、アクティブ型無線 ICタグ Tが通過する空間 Sを挟んで一方 側に 2つの円偏波平面アンテナ 1, 1 'を上下方向に並べて設置し、反対側に反射板 2'を設置し、円偏波平面アンテナ 1, 1 'の裏側に反射板 2を設置した構成である。  In this antenna device 40, two circularly polarized flat antennas 1, 1 'are arranged side by side on one side across a space S through which an active wireless IC tag T passes, and a reflector 2' is installed on the opposite side. The reflector 2 is installed on the back side of the circularly polarized flat antenna 1, 1 '.
[0022] アンテナ装置 40によれば、上下方向に円偏波平面アンテナ 1, 1 'を並べて設置し ているため、上下方向に受信可能範囲を広げることが出来る。また、円偏波平面アン テナ 1, 1 'で受信した結果の比較を行うことができ、信頼性を向上できる。  [0022] According to the antenna device 40, since the circularly polarized flat antennas 1, 1 'are arranged in the vertical direction, the receivable range can be expanded in the vertical direction. In addition, it is possible to compare the results received by the circularly polarized planar antennas 1, 1 'and improve the reliability.
実施例 5  Example 5
[0023] 図 5の（a)は、実施例 5にかかるアンテナ装置 50を示す平面図である。図 5の（b)は 、アンテナ装置 50の正面図である。  FIG. 5A is a plan view of the antenna device 50 according to the fifth embodiment. FIG. 5B is a front view of the antenna device 50.
このアンテナ装置 50は、アクティブ型無線 ICタグ Tが通過する空間 Sを挟んで一対 の円偏波平面アンテナ 1, 1 'を対向させて設置し、各円偏波平面アンテナ 1, 1 'の裏 側に反射板 2, 2'を設置した構成である。  This antenna device 50 is installed with a pair of circularly polarized planar antennas 1, 1 ′ facing each other across a space S through which an active wireless IC tag T passes, and the back of each circularly polarized planar antenna 1, 1 ′. The reflectors 2 and 2 'are installed on the side.
[0024] アンテナ装置 50によれば、アクティブ型無線 ICタグ Tが通過する空間 Sを挟んで一 対の円偏波平面アンテナ 1, 1 'を対向させて設置し、各円偏波平面アンテナ 1, 1 'の 裏側に反射板 2, 2'を設置しているため、反射板 2, 2'で反射したアクティブ型無線 I Cタグ Tからの電波を円偏波平面アンテナ 1, 1 'で受信でき、広い範囲でアクティブ 型無線 ICタグ Tからの電波を受信することが出来る。さらに、一対の円偏波平面アン テナ 1, 1 'で受信した結果の比較を行うことができ、信頼性を向上できる。  [0024] According to the antenna device 50, a pair of circularly polarized planar antennas 1, 1 'are placed facing each other across the space S through which the active wireless IC tag T passes, and each circularly polarized planar antenna 1 , 1 'reflectors 2 and 2' are installed on the back side, so that the circularly polarized flat antennas 1, 1 'can receive radio waves from the active RFID tag T reflected by the reflectors 2 and 2'. It can receive radio waves from the active wireless IC tag T over a wide range. Furthermore, the results received by the pair of circularly polarized planar antennas 1, 1 'can be compared, and the reliability can be improved.
実施例 6  Example 6
[0025] 図 6の（a)は、実施例 6にかかるアンテナ装置 60を示す平面図である。図 6の（b)は 、アンテナ装置 60の正面図である。 このアンテナ装置 60は、アクティブ型無線 ICタグ Tが通過する空間 Sを挟んで一方 側に第 1の円偏波平面アンテナ 1を設置し、反対側であつてアクティブ型無線 ICタグ Tが通過する方向に位置をずらせた設置位置に第 2の円偏波平面アンテナ 1 'を設 置し、各円偏波平面アンテナ 1, 1 'の裏側に反射板 2, 2'を設置し、第 1の円偏波平 面アンテナ 1を第 2の円偏波平面アンテナ 1 '側に傾けると共に第 2の円偏波平面ァ ンテナ 1 'を第 1の円偏波平面アンテナ 1側に傾けた構成である。 FIG. 6A is a plan view of the antenna device 60 according to the sixth embodiment. FIG. 6B is a front view of the antenna device 60. In this antenna device 60, the first circularly polarized flat antenna 1 is installed on one side across the space S through which the active wireless IC tag T passes, and the active wireless IC tag T passes on the opposite side. The second circularly polarized planar antenna 1 'is installed at the installation position shifted in the direction, and the reflectors 2, 2' are installed on the back side of each circularly polarized planar antenna 1, 1 '. In this configuration, the circularly polarized flat antenna 1 is tilted toward the second circularly polarized planar antenna 1 ′ and the second circularly polarized planar antenna 1 ′ is tilted toward the first circularly polarized planar antenna 1.
[0026] アンテナ装置 60によれば、アクティブ型無線 ICタグ Tが通過する方向に位置をずら せて 2つの円偏波平面アンテナ 1, 1 'を設置しているため、アクティブ型無線 ICタグ Tが通過する方向に受信可能範囲を広げることが出来る。また、 2つの円偏波平面ァ ンテナ 1, 1 'で電波を受信する順序により、アクティブ型無線 ICタグ Tの通過方向お よび通過した力否かを検出可能になる。また、 2つの円偏波平面アンテナ 1, 1 'で受 信した結果の比較を行うことができ、信頼性を向上できる。さらに、 2つの円偏波平面 アンテナ 1, 1 'の受信可能範囲にオーバラップ部分を作ることにより、同時受信した 結果の比較を行うことができ、信頼性を向上できる。 [0026] According to the antenna device 60, since the two circularly polarized flat antennas 1, 1 'are installed with their positions shifted in the direction in which the active wireless IC tag T passes, the active wireless IC tag T Can extend the receivable range in the direction in which. In addition, it is possible to detect the passing direction of the active wireless IC tag T and whether or not it has passed through the order in which radio waves are received by the two circularly polarized flat antennas 1, 1 ′. In addition, it is possible to compare the results received by the two circularly polarized flat antennas 1, 1 ', and improve the reliability. Furthermore, by creating an overlap part in the receivable range of the two circularly polarized planar antennas 1, 1 ', the results of simultaneous reception can be compared, improving reliability.
実施例 7  Example 7
[0027] 図 7の（a)は、実施例 7にかかるアンテナ装置 70を示す平面図である。図 7の（b)は FIG. 7A is a plan view of the antenna device 70 according to the seventh embodiment. Figure 7 (b)
、アンテナ装置 70の正面図である。 2 is a front view of the antenna device 70. FIG.
このアンテナ装置 70は、実施例 2にかかるアンテナ装置 20を 2以上並べると共に隣 接するアンテナ装置間の反射板 21, 22は共用とした構成である。  The antenna device 70 has a configuration in which two or more antenna devices 20 according to the second embodiment are arranged and the reflectors 21 and 22 between adjacent antenna devices are shared.
[0028] アンテナ装置 70によれば、アクティブ型無線 ICタグ Tが通過する空間 Sを 2以上並 列に設けることが出来る。また、隣接するアンテナ装置間の反射板 21, 22を共用す ることで構成を簡単ィ匕できる。 [0028] According to the antenna device 70, two or more spaces S through which the active wireless IC tag T passes can be provided in parallel. In addition, the configuration can be simplified by sharing the reflectors 21 and 22 between adjacent antenna devices.
実施例 8  Example 8
[0029] 実施例 3〜実施例 6にかかるアンテナ装置 30〜60を 2以上並べると共に隣接する アンテナ装置間の反射板を共用とした構成としてもよい。  [0029] Two or more antenna devices 30 to 60 according to the third to sixth embodiments may be arranged, and a reflector between adjacent antenna devices may be shared.
産業上の利用可能性  Industrial applicability
[0030] 本発明のアンテナ装置は、ゲート通過管理装置に好適である。 図面の簡単な説明 The antenna device of the present invention is suitable for a gate passage management device. Brief Description of Drawings
[図 1]実施例 1に係るアンテナ装置を示す平面図および正面図である。  FIG. 1 is a plan view and a front view showing an antenna device according to a first embodiment.
[図 2]実施例 2に係るアンテナ装置を示す平面図および正面図である。 FIG. 2 is a plan view and a front view showing an antenna apparatus according to a second embodiment.
[図 3]実施例 3に係るアンテナ装置を示す平面図および正面図である。 FIG. 3 is a plan view and a front view showing an antenna apparatus according to a third embodiment.
[図 4]実施例 4に係るアンテナ装置を示す平面図および正面図である。 FIG. 4 is a plan view and a front view showing an antenna apparatus according to a fourth embodiment.
[図 5]実施例 5に係るアンテナ装置を示す平面図および正面図である。 FIG. 5 is a plan view and a front view showing an antenna apparatus according to a fifth embodiment.
[図 6]実施例 6に係るアンテナ装置を示す平面図および正面図である。 FIG. 6 is a plan view and a front view showing an antenna apparatus according to a sixth embodiment.
[図 7]実施例 7に係るアンテナ装置を示す平面図および正面図である。 符号の説明 FIG. 7 is a plan view and a front view showing an antenna apparatus according to a seventh embodiment. Explanation of symbols
1, 1 ' 円偏波平面アンテナ  1, 1 'circularly polarized planar antenna
2, 2' 反射板  2, 2 'reflector
3 支柱  3 Prop
10〜70 アンテナ装置  10-70 antenna device
T アクティブ型無線 ICタグ  T active wireless IC tag
S アクティブ型無線 ICタグが通過する空間  S Space through which active wireless IC tags pass

Claims

請求の範囲 The scope of the claims
[1] アクティブ型無線 ICタグ (T)からの電波を受信するためのアンテナ装置であって、ァ クティブ型無線 ICタグ (T)が通過する空間（S)を挟んで一方側に円偏波平面アンテ ナ（1)を設置し、反対側に反射板 (2' )を設置したことを特徴とするアンテナ装置。  [1] An antenna device for receiving radio waves from an active wireless IC tag (T), circularly polarized on one side across a space (S) through which the active wireless IC tag (T) passes An antenna device characterized in that a planar antenna (1) is installed and a reflector (2 ') is installed on the opposite side.
[2] 請求項 1に記載のアンテナ装置において、前記円偏波平面アンテナ（1)の裏側にも 反射板 (2)を設置したことを特徴とするアンテナ装置。  [2] The antenna device according to claim 1, wherein a reflector (2) is also provided on the back side of the circularly polarized flat antenna (1).
[3] 請求項 1または請求項 2に記載のアンテナ装置にぉ 、て、アクティブ型無線 ICタグ（ T)が通過する方向に 2以上の前記円偏波平面アンテナ（1, 1 ' )を並べて設置したこ とを特徴とするアンテナ装置。  [3] Two or more circularly polarized planar antennas (1, 1 ′) are arranged in the direction in which the active wireless IC tag (T) passes through the antenna device according to claim 1 or 2. An antenna device characterized by installation.
[4] 請求項 1または請求項 2に記載のアンテナ装置にぉ 、て、アクティブ型無線 ICタグ（ T)が通過する方向と交差する方向に 2以上の前記円偏波平面アンテナ（1, 1 ' )を並 ベて設置したことを特徴とするアンテナ装置。  [4] In the antenna device according to claim 1 or 2, the two or more circularly polarized planar antennas (1, 1) are arranged in a direction crossing a direction in which the active wireless IC tag (T) passes. ') An antenna device characterized by being installed side by side.
[5] アクティブ型無線 ICタグ (T)からの電波を受信するためのアンテナ装置であって、ァ クティブ型無線 ICタグ (T)が通過する空間（S)を挟んで一対の円偏波平面アンテナ (1, 1 ' )を対向させて設置し、各円偏波平面アンテナ（1, 1 ' )の裏側に反射板 (2, 2 ' )を設置したことを特徴とするアンテナ装置。  [5] An antenna device for receiving radio waves from the active wireless IC tag (T), and a pair of circularly polarized planes across the space (S) through which the active wireless IC tag (T) passes An antenna device characterized in that an antenna (1, 1 ') is installed facing each other and a reflector (2, 2') is installed on the back side of each circularly polarized flat antenna (1, 1 ').
[6] アクティブ型無線 ICタグ (T)からの電波を受信するためのアンテナ装置であって、ァ クティブ型無線 ICタグ (T)が通過する空間（S)を挟んで一方側に第 1の円偏波平面 アンテナ（1)を設置し、反対側であってアクティブ型無線 ICタグ (T)が通過する方向 に位置をずらせた設置位置に第 2の円偏波平面アンテナ（1 ' )を設置し、各円偏波 平面アンテナ（1, 1 ' )の裏側に反射板 (2, 2' )を設置したことを特徴とするアンテナ 装置。  [6] An antenna device for receiving radio waves from the active wireless IC tag (T), the first wireless device on one side across the space (S) through which the active wireless IC tag (T) passes Install the circularly polarized planar antenna (1), and place the second circularly polarized planar antenna (1 ') on the opposite side of the installation position in the direction that the active wireless IC tag (T) passes. An antenna device, characterized in that a reflector (2, 2 ') is installed on the back side of each circularly polarized flat antenna (1, 1').
[7] 請求項 6に記載のアンテナ装置において、前記第 1の円偏波平面アンテナ（1)を前 記第 2の円偏波平面アンテナ（1 ' )側に傾けると共に前記第 2の円偏波平面アンテナ (1 ' )を前記第 1の円偏波平面アンテナ（1)側に傾けたことを特徴とするアンテナ装 置。  [7] In the antenna device according to claim 6, the first circularly polarized planar antenna (1) is tilted toward the second circularly polarized planar antenna (1 ′) and the second circularly polarized antenna An antenna device characterized in that a wave plane antenna (1 ') is tilted toward the first circularly polarized flat antenna (1).
[8] 請求項 2から請求項 7に記載のアンテナ装置を 2以上並べると共に隣接するアンテナ 装置間の反射板 (21, 22)は共用としたことを特徴とするアンテナ装置。  [8] An antenna device characterized in that two or more of the antenna devices according to claims 2 to 7 are arranged and a reflector (21, 22) between adjacent antenna devices is shared.
PCT/JP2006/303565 2005-11-02 2006-02-27 Antenna device WO2007052371A1 (en)

Applications Claiming Priority (2)

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JP2005-319457 2005-11-02
JP2005319457A JP2007129416A (en) 2005-11-02 2005-11-02 Antenna system

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