JPH0516201B2 - - Google Patents
Info
- Publication number
- JPH0516201B2 JPH0516201B2 JP62069064A JP6906487A JPH0516201B2 JP H0516201 B2 JPH0516201 B2 JP H0516201B2 JP 62069064 A JP62069064 A JP 62069064A JP 6906487 A JP6906487 A JP 6906487A JP H0516201 B2 JPH0516201 B2 JP H0516201B2
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- loop antenna
- loop
- antennas
- electromagnetic coupling
- 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 - Lifetime
Links
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 230000004907 flux Effects 0.000 claims description 10
- 230000001939 inductive effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Support Of Aerials (AREA)
- Near-Field Transmission Systems (AREA)
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、いずれも固定
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つて、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 a fixed installation, and an antenna on a mobile object, and in order to achieve good communication, it is necessary to have a tight electromagnetic coupling between the guided wire and the antenna. Therefore, the relative positional relationship between the guide wire and the antenna is limited.
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。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。 Therefore, when arranging two or more loop antennas on a moving body for one guide wire, make sure that 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. Therefore, a considerably large space is required for its arrangement. 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. .
また、例えば、一方のアンテナを基地局との通
話用に用い、他方のアンテナを移動体の運行制御
信号用に用いた場合、２つのアンテナ相互間の電
磁結合がないことが要求される。 Further, for example, when one antenna is used for communication with a base station and the other antenna is used for operation control signals of a mobile object, it is required that there is no electromagnetic coupling between the two antennas.
（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２つの枠形ループアンテナを複合した誘
導無線装置用ループアンテナを提供すことを目的
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. An object of the present invention is to provide a loop antenna for an inductive radio device that is a combination of a frame-shaped loop antenna, and the present invention will be described in detail below.
（発明の構成及び作用）
第２図は本発明の作用の説明図であり、２つの
枠形ループアンテナの相互位置関係の３つの態様
を示す。図Ａ，Ｂ，Ｃはアンテナの正面斜視図で
あり、図A′，B′，C′はそれぞれの平面図である。(Structure and operation of the invention) FIG. 2 is an explanatory diagram of the operation of the invention, showing three aspects of the mutual positional relationship of two frame-shaped loop antennas. Figures A, B, and C are front perspective views of the antenna, and Figures A', B', and C' are respective plan views.
まず、第２図Ａ，A′の場合、２つの枠形ルー
プアンテナ１２−１，１２−２が殆ど重なるよう
に近接して配置された場合は、例えばアンテナ１
２−１を送信アンテナとして電波を送出したと
き、アンテナ１２−１によつて誘起される磁束の
殆どがアンテナ１２−２と鎖交しその鎖交磁束
φ1の方向は破線矢印で示したようになる。従つ
て、２つの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。 First, in the case of FIGS. 2A and 2A', when the two frame-shaped loop antennas 12-1 and 12-2 are arranged close to each other so as to almost overlap, for example, the antenna 1
When transmitting radio waves using antenna 2-1 as a transmitting antenna, most of the magnetic flux induced by antenna 12-1 interlinks with antenna 12-2, and the direction of the interlinked magnetic flux φ 1 is as shown by the broken line arrow. become. Therefore, the electromagnetic coupling between the two antennas becomes dense, so mutual interference between the antennas increases, and energy exchange with the guide wire is not performed effectively.
次に、第２図Ｃ，C′の場合、２つの枠形ループ
アンテナ１２−１，１２−２を互いに並行する方
向に次第に離して行き、重なり合う部分がなくな
る範囲以上に離すと、アンテナ１２−１によつて
誘起される磁束のうちアンテナ１２−２と鎖交す
る磁束φ2の方向は破線矢印で示したように前述
のＡ，A′の場合と逆の方向となり、やはり電磁
結合を生ずる。 Next, in the case of FIG. 2C and C', the two frame-shaped loop antennas 12-1 and 12-2 are gradually separated in parallel directions, and when they are separated beyond the range where the overlapping parts disappear, the antenna 12- Among the magnetic fluxes induced by antenna 12-2, the direction of magnetic flux φ2 interlinking with antenna 12-2 is in the opposite direction to that in the case of A and A' described above, as shown by the broken line arrow, and electromagnetic coupling also occurs. .
第２図Ｂ，B′の場合は本発明の実施例を示し、
上記両態様の中間の状態を示すものである。すな
わち、２つの枠形ループアンテナ１２−１，１２
−２を互いに並行する方向に次第に離していき互
いに重なり合う部分の間隔１３をある距離（面
積）にすると、アンテナ１２−１によつて誘起さ
れる磁束のうち重なり合う部分を通過する磁束
φ1の総和と、重なつていない部分を通過する磁
束φ2の総和とが破線矢印で示したように互いに
逆方向で打ち消し合うようになる所がある。この
ような相互位置に両アンテナを設置すれば、互い
に電磁結合のない状態を実現することができる。 The cases of FIGS. 2B and B' show embodiments of the present invention,
This shows an intermediate state between the above two embodiments. That is, two frame-shaped loop antennas 12-1, 12
-2 are gradually separated in parallel directions to make the interval 13 between the overlapping parts a certain distance (area), then the sum of the magnetic flux φ 1 that passes through the overlapping parts of the magnetic flux induced by the antenna 12-1 is There is a point where the magnetic flux φ 2 and the sum of the magnetic flux φ 2 passing through the non-overlapping parts cancel each other out in opposite directions, as shown by the broken arrow. By installing both antennas at such mutual positions, it is possible to achieve a state in which there is no electromagnetic coupling with each other.
本発明は２つのループアンテナを第２図Ｂ，
B′に示すように、互いに電磁結合の殆どない位
置またはその近傍に配置することにより、従来の
欠点を一掃し著しく小形にすることができる。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。 The present invention uses two loop antennas as shown in FIG.
As shown in B', by arranging the elements at or near a position where there is almost no electromagnetic coupling with each other, the conventional drawbacks can be eliminated and the size can be significantly reduced. 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 description, 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
は本発明の作用を説明する正面斜視図と平面図で
あり、Ｂ，B′は本発明の実施例を示す正面斜視
図と平面図である。
１１…誘導線、１２−１，１２−２…ループア
ンテナ、３…移動体。
Fig. 1 is a diagram showing the relationship between the guide wire and the loop antenna of a moving body in the conventional earth return method, Fig. 2 is a front perspective view and a plan view illustrating the operation of the present invention, and B and B' are the main 1 is a front perspective view and a plan view showing an embodiment of the invention. FIG. 11... Guide wire, 12-1, 12-2... Loop antenna, 3... Mobile object.
Claims (1)
動する移動体側装置に、該誘導線と電磁結合する
ための２つの独立したループアンテナが互いにそ
の一部が重なり合うように並行して配置され、 該重なり合う部分の面積が、一方のループアン
テナによつて誘起される磁束のうち他方のループ
アンテナの前記重なり合う部分を鎖交する磁束の
総和がその他の部分を鎖交する反対方向の磁束の
総和にほぼ等しく打ち消し合つて前記一方のルー
プアンテナから該他方のループアンテナに対する
電磁結合が殆どなくなるように設定されたことを
特徴とする誘導無線装置用ループアンテナ。[Scope of Claims] 1. In a guided radio communication system, two independent loop antennas for electromagnetically coupling with the guiding wire are arranged in parallel to a mobile device moving along a guiding wire so that they partially overlap each other. The area of the overlapping portion is such that the sum of the magnetic fluxes induced by one loop antenna that interlinks the overlapping portion of the other loop antenna is in the opposite direction that interlinks the other portion. 1. A loop antenna for an inductive radio device, characterized in that the loop antenna is set so that electromagnetic coupling from the one loop antenna to the other loop antenna is almost eliminated by canceling out substantially the same sum of magnetic flux.
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 JPS63236401A (en) | 1988-10-03 |
| JPH0516201B2 true 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) |
Families Citing this family (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63236401A (en) | 1988-10-03 |
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