JP2744895B2 - Transmitting and receiving antenna - Google Patents
Transmitting and receiving antennaInfo
- Publication number
- JP2744895B2 JP2744895B2 JP7148914A JP14891495A JP2744895B2 JP 2744895 B2 JP2744895 B2 JP 2744895B2 JP 7148914 A JP7148914 A JP 7148914A JP 14891495 A JP14891495 A JP 14891495A JP 2744895 B2 JP2744895 B2 JP 2744895B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic core
- transmitting
- receiving antenna
- antenna
- annular groove
- 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.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば入室者チェック
等を行なうために、被検査移動体に向けて検査波を発射
し、上記移動体からの身分証明情報等を含む応答波を受
信する識別システム用として好適な送受信アンテナに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention emits an inspection wave toward a mobile object to be inspected and receives a response wave including identification information and the like from the mobile object, for example, for checking an occupant. The present invention relates to a transmitting / receiving antenna suitable for an identification system.
【０００２】[0002]
【従来の技術】従来のこの種の送受信アンテナは、棒状
コアに巻線を施しただけの単純な構造を有するものであ
った。2. Description of the Related Art A conventional transmitting and receiving antenna of this type has a simple structure in which a rod-shaped core is simply wound.
【０００３】[0003]
【発明が解決しようとする課題】上記した従来の送受信
アンテナは、指向性が全方位指向性であるため、エネル
ギーが分散してしまい、効率のよい送受信が行なえない
という欠点があった。本発明の目的は指向性が所要方向
に特定され、極めて効率のよい送受信が行なえ、信頼度
の高い識別システム等を構築可能な送受信アンテナを提
供することにある。The above-mentioned conventional transmitting / receiving antenna has a drawback that, since the directivity is omnidirectional, energy is dispersed and efficient transmission / reception cannot be performed. SUMMARY OF THE INVENTION An object of the present invention is to provide a transmission / reception antenna in which directivity is specified in a required direction, transmission / reception can be performed extremely efficiently, and a highly reliable identification system or the like can be constructed.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決し目的を
達成するために、本発明の送受信アンテナは、以下の如
く構成されている。本発明の送受信アンテナは、被検査
移動体に向けて検査波を発射し、上記移動体からの身分
証明情報等を含む応答波を受信する送受信アンテナにお
いて、平板状磁性体の一側面周辺に沿って形成された環
状溝を有する磁心と、この磁心の環状溝に収容され、前
記検査波と応答波との送受信を行なうアンテナ素子用コ
イルと、前記磁心の背面に一側面を当接させて設置され
た上記磁心の背面面積より広い面積を有する平板状を成
すアース板と、を具備したことを特徴としている。 In order to solve the above-mentioned problems and achieve the object, a transmitting / receiving antenna according to the present invention is configured as follows. The transmitting and receiving antenna of the present invention emits an inspection wave toward a mobile object to be inspected, and receives a response wave including identification information and the like from the mobile object. A magnetic core having an annular groove formed by the above, an antenna element coil housed in the annular groove of the magnetic core for transmitting and receiving the test wave and the response wave, and installed with one side surface in contact with the back surface of the magnetic core Is
A flat plate having an area larger than the back area of the magnetic core.
And a ground plate.
【０００５】[0005]
【作用】上記手段を講じた結果、次のような作用が生じ
る。磁心の形状が断面Ｅ字形を成しているので、背面側
へのエネルギー放射が抑制され、指向性が磁心の前面中
心方向に集中する。その結果、エネルギーロスが少な
く、被検査移動体との送受信を効率よく行なえる。しか
も磁心の背面側に設置した磁心の背面面積より広い平板
状を成すアース板の存在により、磁心背面側へのエネル
ギー放射が更に制限されることになり、その結果、一層
効率の良い送受信が可能となる。[Action] As a result of taking the above-mentioned hand stage, effects such as the following may occur. The shape of the magnetic center is formed into a cross-section E-shaped, the energy radiated to the rear side is suppressed, directivity is in front of the magnetic core
Concentrate in the direction of the heart . As a result, energy loss is small and transmission / reception with the mobile object to be inspected can be performed efficiently. Only
Also, a flat plate larger than the back area of the core installed on the back side of the core
The presence of the ground plate forming the Jo, energy radiation into the core back side is to be further restricted, as a result, it is possible to be transmitted and received with more efficiency.
【０００６】[0006]
（第１実施例）図１は本発明の第１実施例に係る送受信
アンテナの構成を示す図で、（ａ）は斜視図、（ｂ）は
断面図、（ｃ）は識別システムへの適用例を示すブロッ
ク図である。図１の（ａ）（ｂ）（ｃ）に示すように、
この送受信アンテナは磁心１０と、アンテナ素子用コイ
ル２０と、アース板３０とからなっている。(First Embodiment) FIGS. 1A and 1B show the configuration of a transmitting / receiving antenna according to a first embodiment of the present invention, wherein FIG. 1A is a perspective view, FIG. 1B is a sectional view, and FIG. It is a block diagram showing an example. As shown in FIGS. 1A, 1B, and 1C,
The transmitting / receiving antenna includes a magnetic core 10, an antenna element coil 20, and a ground plate 30.
【０００７】図２は磁心１０の詳細な構造を示す図であ
り、（ａ）は斜視図、（ｂ）は正面図、（ｃ）は（ｂ）
のＣーＣ矢視断面図、（ｄ）は（ｂ）のＤーＤ矢視断面
図である。図２に示すように、磁心１０は、例えば高透
磁率のフェライト等からなる平板状磁性体の一側面周辺
に沿って、例えば矩形状の環状溝１１を形成されたもの
となっている。このため磁心１０の一側面中央部には、
相対的に直方体状の軸柱１２が突出している。FIGS. 2A and 2B show the detailed structure of the magnetic core 10. FIG. 2A is a perspective view, FIG. 2B is a front view, and FIG.
(D) is a cross-sectional view taken along the line DD in (b). As shown in FIG. 2, the magnetic core 10 has, for example, a rectangular annular groove 11 formed along the periphery of one side surface of a flat magnetic body made of, for example, ferrite having high magnetic permeability. Therefore, in the center of one side of the magnetic core 10,
A relatively rectangular parallelepiped shaft column 12 protrudes.
【０００８】図１に説明を戻す。アンテナ素子用コイル
２０は絶縁被覆導線を複数ターン巻回し、かつ前記環状
溝１１の中に収容可能な如く、全体を略矩形状に成形し
たものとなっている。かくして上記アンテナ素子用コイ
ル２０は、磁心１０の直方体状をなす軸柱１２の周囲に
巻回された態様で前記環状溝１１内に収容される。上記
アンテナ素子用コイル２０の引き出し線２１，２２は、
上記環状溝１１から外部へ導出され、図１の（ｃ）に示
すように送受信回路４０に接続される。送受信回路４０
は、身分証明（ＩＤ）識別回路５０と接続されている。
６０は移動体としてのＩＤカードである。Returning to FIG. The coil 20 for the antenna element is formed by winding an insulated conductor wire a plurality of turns, and is formed into a substantially rectangular shape as a whole so as to be accommodated in the annular groove 11. Thus, the antenna element coil 20 is accommodated in the annular groove 11 so as to be wound around the rectangular column 12 of the magnetic core 10. The leads 21 and 22 of the antenna element coil 20 are as follows.
It is led out of the annular groove 11 and connected to the transmission / reception circuit 40 as shown in FIG. Transmitting / receiving circuit 40
Are connected to an identification (ID) identification circuit 50.
Reference numeral 60 denotes an ID card as a moving body.
【０００９】磁心１０は、図１の（ａ）および（ｂ）に
示すように、上記磁心１０の背面面積より十分広いアー
ス板３０の略中心部位に、その背面を当接させた状態で
設置される。なお図示はしていないが、実際の使用に際
しては、環状溝１１の内部にアンテナ素子用コイル２０
が収容された後、例えばドア横の壁等に埋設され、表面
すなわち磁心１０の前面は化粧板あるいは壁紙等で覆わ
れる。As shown in FIGS. 1 (a) and 1 (b), the magnetic core 10 is installed at a substantially central portion of the ground plate 30 which is sufficiently larger than the rear surface area of the magnetic core 10 with its rear surface abutting. Is done. Although not shown, in actual use, the antenna element coil 20 is provided inside the annular groove 11.
Is housed in, for example, a wall next to the door, and the surface, that is, the front surface of the magnetic core 10 is covered with a decorative board or wallpaper.
【００１０】かくして本実施例の送受信アンテナは、被
検査移動体であるＩＤカード６０に向けて検査波が発射
され、上記ＩＤカード６０からの身分証明情報等を含む
応答波を受信し得るようになっている。Thus, the transmitting / receiving antenna of this embodiment emits a test wave toward the ID card 60, which is the mobile object to be tested, and can receive a response wave including identification information and the like from the ID card 60. Has become.
【００１１】（実験例）図３は第１実施例に係る送受信
アンテナの実験例を示す斜視図である。図示の如く、ア
ース板３０として６００mm角の鉄板を用い、このアース
板３０の上に、磁心１０に自己インダクタンス２７μＨ
のアンテナ素子用コイル２０を装着したアンテナ本体を
設置し、上記コイル２０に１３４ｋＨz 程度の周波数の
電気信号を印加し、磁心１０の長軸を含むアース板３０
と垂直な平面内におけるＸ方向指向性と、磁心１０の短
軸を含むアース板３０と垂直な平面内におけるＹ方向指
向性とを計測した。(Experimental Example) FIG. 3 is a perspective view showing an experimental example of the transmitting / receiving antenna according to the first embodiment. As shown in the figure, a 600 mm square iron plate is used as the ground plate 30, and a self-inductance of 27 μH is applied to the magnetic core 10 on the ground plate 30.
An antenna body equipped with the antenna element coil 20 is installed, an electric signal having a frequency of about 134 kHz is applied to the coil 20, and an earth plate 30 including the long axis of the magnetic core 10 is applied.
And the Y direction in a plane perpendicular to the ground plate 30 including the short axis of the magnetic core 10 were measured.
【００１２】図４は上記実験の結果を示す図であって、
（ａ）はＸ方向指向性を示す図であり、（ｂ）はＹ方向
指向性を示す図である。図示の如く、Ｘ方向およびＹ方
向ともに角度が９０度（磁心１０の前面中心部）の近傍
において、通信距離（送受信可能な被検査移動体までの
距離）が最大となる指向性を示している。FIG. 4 shows the results of the above experiment.
(A) is a figure which shows X direction directivity, (b) is a figure which shows Y direction directivity. As shown in the figure, the directivity in which the communication distance (the distance to the movable body to be inspected and transmitted) is maximized near the angle of 90 degrees (the center of the front surface of the magnetic core 10) in both the X and Y directions. .
【００１３】（変形例）本発明は上述した実施例に限定
されるものではない。たとえば磁心として直方体状をな
す磁心１０を例示したが、円板状あるいは楕円板状をな
す磁心、とくに軸柱１２の部分が円形ディスク状や楕円
板状をなすものであっても良い。(Modification) The present invention is not limited to the above embodiment. For example, although the magnetic core 10 having a rectangular parallelepiped shape has been exemplified as the magnetic core, a magnetic core having a disk shape or an elliptical plate shape, in particular, a portion of the shaft column 12 may have a circular disk shape or an elliptic plate shape.
【００１４】（実施例のまとめ）実施例（実験例，変形
例を含む）に示された送受信アンテナの構成および作用
効果をまとめると次の通りである。 ［１］実施例に示された送受信アンテナは、被検査移動
体（６０）に向けて検査波を発射し、上記移動体（６
０）からの身分証明情報等を含む応答波を受信する送受
信アンテナにおいて、平板状磁性体の一側面周辺に沿っ
て形成された環状溝１１を有する磁心１０と、この磁心
１０の環状溝１１に収容され、前記検査波と応答波の送
受信を行なうアンテナ素子用コイル２０とを備えてい
る。(Summary of Embodiment) The configuration and operation and effect of the transmitting / receiving antenna shown in the embodiment (including the experimental example and the modified example) are summarized as follows. [1] The transmitting and receiving antenna shown in the embodiment emits an inspection wave toward the mobile object (60) to be inspected, and
In the transmission / reception antenna for receiving the response wave including the identification information from 0), a magnetic core 10 having an annular groove 11 formed along the periphery of one side surface of the flat magnetic body, and an annular groove 11 of the magnetic core 10 are provided. An antenna element coil 20 that accommodates and transmits and receives the test wave and the response wave is provided.
【００１５】したがって上記送受信アンテナにおいて
は、磁心１０の形状が断面Ｅ字形を成しているので、背
面側へのエネルギー放射が抑制され、指向性は全面中心
方向に集中する。その結果、エネルギーロスが少なく、
被検査移動体（６０）との送受信を効率よく行なえる。 ［２］実施例に示された送受信アンテナは、上記［１］
に記載された送受信アンテナであって、かつ磁心１０
は、上記磁１０の背面面積より広いアース板３０上に、
上記背面を当接させて設置されている。Therefore, in the transmitting / receiving antenna, since the shape of the magnetic core 10 has an E-shaped cross section, the radiation of energy to the rear side is suppressed, and the directivity is concentrated toward the center of the entire surface. As a result, energy loss is small,
Transmission and reception with the mobile object (60) to be inspected can be performed efficiently. [2] The transmitting and receiving antenna shown in the embodiment is the same as the above [1]
And the transmission and reception antenna described in
Is placed on the ground plate 30 which is larger than the back surface area of the magnet 10,
It is installed with the back surface in contact.
【００１６】したがって上記送受信アンテナにおいて
は、アース板３０の存在により、磁心１０の背面側への
エネルギー放射がさらに制限されるため、一層効率の良
い送受信が可能となる。 ［３］実施例に示された送受信アンテナは、上記［１］
に記載された送受信アンテナであって、かつ磁心１０
が、高透磁率のフェライトコアからなっている。Therefore, in the transmitting / receiving antenna, the radiation of energy to the back side of the magnetic core 10 is further restricted by the presence of the ground plate 30, so that more efficient transmission / reception is possible. [3] The transmitting / receiving antenna shown in the embodiment is the same as the above [1].
And the transmission and reception antenna described in
However, it is made of a ferrite core having a high magnetic permeability.
【００１７】したがって上記送受信アンテナにおいて
は、品質が安定化する上、製作加工が容易であるため、
安価に製作可能である。 ［４］実施例に示された送受信アンテナは、上記［１］
に記載された送受信アンテナであって、かつ磁心１０の
少なくとも軸柱１２の部分が円板状または楕円板状を成
している。Therefore, in the above-mentioned transmitting and receiving antenna, since the quality is stabilized and the manufacturing process is easy,
It can be manufactured at low cost. [4] The transmitting and receiving antenna shown in the embodiment is the same as the above [1]
And at least a portion of the shaft column 12 of the magnetic core 10 has a disk shape or an elliptical plate shape.
【００１８】したがって上記送受信アンテナにおいて
は、コイル形状が矩形状の場合に比べて、コイル成形作
業および磁心１０への装着作業が円滑になり、コイル２
０を損傷する危険性が大幅に軽減される。Therefore, in the above-mentioned transmitting and receiving antenna, the coil forming operation and the mounting operation to the magnetic core 10 become smoother than the case where the coil shape is rectangular, and the coil 2
The risk of damaging 0 is greatly reduced.
【００１９】[0019]
【発明の効果】本発明によれば、指向性が所要方向に特
定され、極めて効率のよい送受信を行なうことができ、
信頼度の高い識別システム等を構築可能な送受信アンテ
ナを提供できる。According to the present invention, the directivity is specified in a required direction, and extremely efficient transmission and reception can be performed.
It is possible to provide a transmission / reception antenna capable of constructing a highly reliable identification system and the like.
【図１】本発明の第１実施例に係る送受信アンテナの構
成を示す図であり、（ａ）は斜視図、（ｂ）は断面図、
（ｃ）は識別システムへの適用例を示すブロック図。1A and 1B are diagrams showing a configuration of a transmitting and receiving antenna according to a first embodiment of the present invention, wherein FIG. 1A is a perspective view, FIG.
(C) is a block diagram showing an example of application to an identification system.
【図２】本発明の第１実施例に係る磁心１０の詳細な構
造を示す図であり、（ａ）は斜視図、（ｂ）は正面図、
（ｃ）は（ｂ）のＣーＣ矢視断面図、（ｄ）は（ｂ）の
ＤーＤ矢視断面図。FIG. 2 is a view showing a detailed structure of a magnetic core 10 according to the first embodiment of the present invention, wherein (a) is a perspective view, (b) is a front view,
(C) is a sectional view taken along the line CC in (b), and (d) is a sectional view taken along the line DD in (b).
【図３】本発明の第１実施例に係る送受信アンテナの実
験例を示す斜視図。FIG. 3 is a perspective view showing an experimental example of the transmitting and receiving antenna according to the first embodiment of the present invention.
【図４】本発明の第１実施例に係る上記実験の結果を示
す図であって、（ａ）はＸ方向指向性を示す図、（ｂ）
はＹ方向指向性を示す図。4A and 4B are diagrams showing the results of the above experiment according to the first embodiment of the present invention, wherein FIG. 4A is a diagram showing the X-direction directivity, and FIG.
FIG. 4 is a diagram showing Y direction directivity.
１０…磁心 １１…環状溝 １２…軸柱 ２０…アンテナ素
子用コイル ２１，２２…引き出し線 ３０…アース板 ４０…送受信回路 ５０…ＩＤ識別回
路 ６０…ＩＤカードDESCRIPTION OF SYMBOLS 10 ... Magnetic core 11 ... Annular groove 12 ... Shaft pillar 20 ... Antenna element coil 21, 22 ... Lead wire 30 ... Ground plate 40 ... Transmission / reception circuit 50 ... ID discrimination circuit 60 ... ID card
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｈ０１Ｑ 1/48 (72)発明者 斎藤 正利 東京都品川区南大井４丁目17番13号 原 田工業株式会社内 (72)発明者 喜多村 重男 東京都中央区日本橋３丁目11番１号 マ イクロ・トーク・システムズ株式会社内 (72)発明者 佐藤 健彦 東京都港区芝３丁目１番12号 美和ロッ ク株式会社内 (56)参考文献 特開 昭61−182206（ＪＰ，Ａ) 実開 平４−101168（ＪＰ，Ｕ) 実開 昭58−19504（ＪＰ，Ｕ) 実開 平１−86734（ＪＰ，Ｕ) 実開 平３−77513（ＪＰ，Ｕ)──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification symbol FI H01Q 1/48 (72) Inventor Masatoshi Saito 4-17-13 Minamioi, Shinagawa-ku, Tokyo Inside Harada Kogyo Co., Ltd. (72) Inventor Shigeo Kitamura 3-1-1 Nihonbashi, Chuo-ku, Tokyo Inside Micro Talk Systems, Inc. (72) Inventor Takehiko Sato 3-1-1-12 Shiba, Minato-ku, Tokyo Inside Miwa Rock Co., Ltd. (56 References JP-A-61-182206 (JP, A) JP-A-4-101168 (JP, U) JP-A-58-19504 (JP, U) JP-A-1-86734 (JP, U) 3-77513 (JP, U)
Claims (1)
記移動体からの身分証明情報等を含む応答波を受信する
送受信アンテナにおいて、 平板状磁性体の一側面周辺に沿って形成された環状溝を
有する磁心と、 この磁心の環状溝に収容され、前記検査波と応答波との
送受信を行なうアンテナ素子用コイルと、前記磁心の背面に一側面を当接させて設置された上記磁
心の背面面積より広い面積を有する平板状を成すアース
板と、 を具備したことを特徴とする送受信アンテナ。An inspection wave is emitted toward a mobile object to be inspected.
Receives response waves including identification information from mobile objects
In the transmitting / receiving antenna, an annular groove formed along the periphery of one side of the flat magnetic body
A magnetic core having the test wave and the response wave accommodated in the annular groove of the magnetic core.
An antenna element coil for transmitting and receiving,The above-mentioned magnetic core, which is installed with one side in contact with the back of the magnetic core
Flat earth with an area larger than the back area of the heart
Board and A transmission / reception antenna, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7148914A JP2744895B2 (en) | 1995-02-08 | 1995-06-15 | Transmitting and receiving antenna |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7-20520 | 1995-02-08 | ||
| JP2052095 | 1995-02-08 | ||
| JP7148914A JP2744895B2 (en) | 1995-02-08 | 1995-06-15 | Transmitting and receiving antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08279714A JPH08279714A (en) | 1996-10-22 |
| JP2744895B2 true JP2744895B2 (en) | 1998-04-28 |
Family
ID=26357481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7148914A Expired - Fee Related JP2744895B2 (en) | 1995-02-08 | 1995-06-15 | Transmitting and receiving antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2744895B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100758100B1 (en) * | 2000-07-19 | 2007-09-11 | 가부시키가이샤 하넥스 | Rfid tag housing structure, rfid tag installation structure and rfid tag communication method |
| WO2012053089A1 (en) * | 2010-10-21 | 2012-04-26 | 東京特殊電線株式会社 | Coil component and coil component unit |
| CN104221216B (en) * | 2012-03-30 | 2017-09-05 | 日立金属株式会社 | Wireless near field communication antenna, Anneta module and radio communication device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5819504U (en) * | 1981-07-28 | 1983-02-07 | スミダ電機株式会社 | loop antenna |
| DE3503348C1 (en) * | 1985-02-01 | 1986-06-19 | Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart | Ferromagnetic multi-shell core for electrical coils |
| JPH0186734U (en) * | 1987-11-30 | 1989-06-08 | ||
| JP2558330Y2 (en) * | 1991-02-06 | 1997-12-24 | オムロン株式会社 | Electromagnetic coupling type electronic equipment |
| JP3077513U (en) * | 2000-11-07 | 2001-05-25 | 船井電機株式会社 | CRT display device |
-
1995
- 1995-06-15 JP JP7148914A patent/JP2744895B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08279714A (en) | 1996-10-22 |
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