JPS63236401A - Composite loop antenna for inductive radio - Google Patents
Composite loop antenna for inductive radioInfo
- Publication number
- JPS63236401A JPS63236401A JP6906487A JP6906487A JPS63236401A JP S63236401 A JPS63236401 A JP S63236401A JP 6906487 A JP6906487 A JP 6906487A JP 6906487 A JP6906487 A JP 6906487A JP S63236401 A JPS63236401 A JP S63236401A
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- electromagnetic coupling
- loop antennas
- generated
- point
- 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.)
- Granted
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 5
- 230000001939 inductive effect Effects 0.000 title claims description 5
- 230000008878 coupling Effects 0.000 claims abstract description 11
- 238000010168 coupling process Methods 0.000 claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 claims abstract description 11
- 230000004907 flux Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Near-Field Transmission Systems (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Support Of Aerials (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の属する技術分野）
本発明は誘導無線通信設備における枠形空心ループアン
テナに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical field to which the invention pertains) The present invention relates to a frame-shaped air-core loop antenna for inductive radio communication equipment.
（従来の技術）
電気鉄道、地下鉄、新交通などの軌道上を走行する移動
体との通信に用いられる誘導無線通信方式には、大地帰
路方式、金属帰路方式或いはこれらを応用した種々の方
式があるが、いづれも固定設備であ・る誘導線と移動体
のアンテナを媒体として通信を行うもので゛あって、良
好な通信を行うためには、誘導線とアンテナの電磁結合
を密とする必要があり、そのために誘導線とアンテナの
相対的位置関係が限定される。(Prior art) Inductive radio communication methods used for communication with moving objects running on tracks such as electric railways, subways, and new transportation include ground return method, metal return method, and various methods that apply these methods. However, in both cases, communication is carried out using a guided wire, which is fixed equipment, and an antenna on a mobile object, and in order to achieve good communication, the electromagnetic coupling between the guided wire and the antenna must be tight. This limits the relative positional relationship between the guide wire and the antenna.
このため一つの誘導線に対して移動体に２つ以上のルー
プアンテナを配置する場合には、第１図に示すように移
動体（３）上の枠形ループアンテナ相互間に電磁結合が
ないように十分な距離（ｄ）を離して配置している。そ
のためその配置には相当大きな空間を必要としている。Therefore, when two or more loop antennas are placed on a moving body for one guide wire, there is no electromagnetic coupling between the frame-shaped loop antennas on the moving body (3) as shown in Figure 1. They are placed at a sufficient distance (d) from each other. Therefore, a considerably large space is required for its arrangement.
すなわち２つのループアンテナを接近させると、例えば
一方を送信アンテナとして用いた場合、その送信エネル
ギーが他のループアンテナと結合してアンテナと誘導線
間のエネルギーの授受が有効に行われないからである。In other words, if two loop antennas are placed close to each other, for example, if one is used as a transmitting antenna, its transmitted energy will combine with the other loop antenna, and the energy exchange between the antenna and the guide wire will not take place effectively. .
（発明の具体的な目的）
本発明は上記のような従来のアンテナ配置の欠点を除く
ためになされたもので、アンテナ相互間の電磁結合を除
き、しかも広い空間を占有することのない枠形の複合ル
ープアンテナを提供することを目的とするもので、以下
本発明について詳細に説明する。(Specific Object of the Invention) The present invention has been made in order to eliminate the drawbacks of the conventional antenna arrangement as described above. The present invention will be described in detail below.
（発明の構成及び作用）
誘導通信において今２つの枠形ループアンテナ１２−１
、１２−２が第２図Ａのように殆ど重なるように近接
して配置された場合には、アンテナ相互間の電磁結合は
密となるのでアンテナ同志の相互干渉が大となり、誘導
線との間のエネルギー授受が有効に行われないことにな
る。(Structure and operation of the invention) Two frame-shaped loop antennas 12-1 in inductive communication
, 12-2 are placed close to each other so that they almost overlap as shown in Figure 2A, the electromagnetic coupling between the antennas becomes dense, so mutual interference between the antennas increases, and interference with the guide wire increases. This means that the energy exchange between them will not be carried out effectively.
しかし両アンテナを次第に離して行くと第２図Ｂに示す
ように上方から下方に向かう磁束φ１と、これと反対に
下方から上方に向かう方向反対の磁束φ２が等しくなっ
て互いに打ち消し合い、アンテナ１２−２との電磁結合
がなくなる所がある。However, as both antennas are gradually separated, as shown in FIG. There are places where the electromagnetic coupling with -2 is lost.
更に第２図Ｃに示すように重なり部分がなくなる範囲以
上に離すと、下方から上方に向かう矢印の磁束がアンテ
ナ１２−２と鎖交することになり電磁結合を生ずる。Further, as shown in FIG. 2C, if they are separated beyond the range where the overlapping portion disappears, the magnetic flux directed from the bottom to the top will interlink with the antenna 12-2, resulting in electromagnetic coupling.
本発明は両ループアンテナを第３図（第２図Ｂと同等）
に示すように、互いに電磁結合の殆どない点またはその
近傍に配置することを特徴とするもので、従来の欠点を
一掃し著しく小形となる。The present invention uses both loop antennas as shown in Fig. 3 (equivalent to Fig. 2B).
As shown in FIG. 2, the device is characterized by being arranged at or near a point where there is almost no electromagnetic coupling with each other, which eliminates the drawbacks of the conventional method and makes it extremely compact.
なお２つの枠形ループアンテナをケース内に収容して機
械的に一体的に結合すれば、取扱に便利となる。Note that if the two frame-shaped loop antennas are housed in a case and mechanically coupled together, it will be convenient to handle.
（発明の効果）
以上の説明から明らかなように、本発明によれば２つの
ループアンテナを近接して配置しても電磁結合を伴うこ
とがないので、専有空間の少ない複合ループアンテナが
得られ、実用に供し効果大なるものがある。(Effects of the Invention) As is clear from the above explanation, according to the present invention, even if two loop antennas are placed close to each other, there is no electromagnetic coupling, so a composite loop antenna that occupies less space can be obtained. , there are some that can be put to practical use and have great effects.
第１図は従来の大地帰路方式における誘導線と移動体の
ループアンテナとの関係配置図、第２図Ａ、Ｂ、Ｃはそ
れぞれ２つのループアンテナの関係配置と磁束分布図、
第３図は本発明の詳細な説明図である。
１１・・・誘導線、１２−１ 、１２−２・・・ループ
アンテナ、３・・・移動体。Figure 1 is a diagram of the relationship between the guide wire and the loop antenna of a moving body in the conventional earth return method, and Figures 2A, B, and C are diagrams of the relationship and magnetic flux distribution of the two loop antennas, respectively.
FIG. 3 is a detailed explanatory diagram of the present invention. DESCRIPTION OF SYMBOLS 11... Guide wire, 12-1, 12-2... Loop antenna, 3... Mobile object.
Claims (1)
空間を形成するように近接して配置したことを特徴とす
る誘導無線用複合ループアンテナ。A composite loop antenna for inductive radio, characterized in that two loop antennas are arranged close to each other so as to form a small space with almost no electromagnetic coupling between them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6906487A JPS63236401A (en) | 1987-03-25 | 1987-03-25 | Composite loop antenna for inductive radio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6906487A JPS63236401A (en) | 1987-03-25 | 1987-03-25 | Composite loop antenna for inductive radio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63236401A true JPS63236401A (en) | 1988-10-03 |
| JPH0516201B2 JPH0516201B2 (en) | 1993-03-03 |
Family
ID=13391766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6906487A Granted JPS63236401A (en) | 1987-03-25 | 1987-03-25 | Composite loop antenna for inductive radio |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63236401A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH054611U (en) * | 1991-06-26 | 1993-01-22 | 雅晴 今井 | Antenna structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5683000A (en) * | 1979-11-15 | 1981-07-07 | Lichtblau G J | Shield balance loop antenna for electronic engineering security system |
-
1987
- 1987-03-25 JP JP6906487A patent/JPS63236401A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5683000A (en) * | 1979-11-15 | 1981-07-07 | Lichtblau G J | Shield balance loop antenna for electronic engineering security system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH054611U (en) * | 1991-06-26 | 1993-01-22 | 雅晴 今井 | Antenna structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0516201B2 (en) | 1993-03-03 |
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