JPH07312514A - Signal isolator - Google Patents
Signal isolatorInfo
- Publication number
- JPH07312514A JPH07312514A JP6129802A JP12980294A JPH07312514A JP H07312514 A JPH07312514 A JP H07312514A JP 6129802 A JP6129802 A JP 6129802A JP 12980294 A JP12980294 A JP 12980294A JP H07312514 A JPH07312514 A JP H07312514A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- antenna
- extracted
- extracting
- signals
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は自動車用ガラスアンテナ
装置に係り、特にアンテナダイバーシティ受信に好適な
ガラスアンテナ用信号分離装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass antenna device for an automobile, and more particularly to a signal separating device for a glass antenna suitable for antenna diversity reception.
【０００２】[0002]
【従来の技術】従来の自動車用アンテナダイバーシティ
受信装置は２種類又は複数のアンテナ車両の窓ガラスに
埋設し、夫々のアンテナの出力を受信電界強度等に応じ
て切換えて取り出すようにしていた。2. Description of the Related Art A conventional antenna diversity receiving apparatus for a vehicle is embedded in a window glass of a vehicle of two or more antennas, and the outputs of the respective antennas are switched according to the received electric field strength and the like.
【０００３】[0003]
【発明が解決しようとする課題】しかしこのようにガラ
スアンテナを複数用いるのでは、その取付方法や、その
設置位置又は見栄え等が良くなく、しかも高価となる問
題があった。However, when a plurality of glass antennas are used in this way, there is a problem in that the mounting method, the installation position or the appearance of the glass antenna are not good, and the cost is high.
【０００４】本発明の目的はかかる問題を解決するた
め、少なくとも２つの給電端子から複数の周波数成分信
号を抽出する信号分離装置を提供する。In order to solve such a problem, an object of the present invention is to provide a signal separation device for extracting a plurality of frequency component signals from at least two power supply terminals.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明の信号分離装置は、少なくとも１個のループ
状アンテナと、該アンテナの両出力端子からの各出力信
号より不平衡な異なる信号を抽出する不平衡信号抽出手
段とを備えたことを要旨とする。In order to achieve the above object, the signal separating apparatus of the present invention comprises at least one loop antenna and different signals unbalanced from the output signals from both output terminals of the antenna. And an unbalanced signal extracting means for extracting
【０００６】[0006]
【作用】本発明の信号分離装置において、１つのループ
状アンテナの両出力端子からの各出力信号から不平衡な
各周波数成分信号が抽出される。In the signal separating apparatus of the present invention, each unbalanced frequency component signal is extracted from each output signal from both output terminals of one loop antenna.
【０００７】[0007]
【実施例】以下図面に示す本発明の実施例を説明する。
図１は本発明を自動車用ガラスアンテナ装置に適用した
実施例で、１は自動車のリアウインドウに埋設されたデ
フォッガーパターン（熱線）で、チョークトランス２を
介して車両電源＋Ｂから給電されるようになっていて、
１つのループ状ガラスアンテナとして利用される。Embodiments of the present invention shown in the drawings will be described below.
FIG. 1 shows an embodiment in which the present invention is applied to a glass antenna device for an automobile, in which 1 is a defogger pattern (heat wire) embedded in a rear window of the automobile, which is fed from a vehicle power source + B through a choke transformer 2. Has become
It is used as one loop glass antenna.
【０００８】即ち、２つの出力端子ａ，ｂは信号分離回
路３に接続されている。信号分離回路３は、例えば、コ
イルトランスＬ1，Ｌ2，Ｌ3及びコンデンサＣ1，Ｃ2か
ら成る。That is, the two output terminals a and b are connected to the signal separation circuit 3. The signal separation circuit 3 is composed of, for example, coil transformers L 1 , L 2 , L 3 and capacitors C 1 , C 2 .
【０００９】コイルトランスＬ1，Ｌ2は出力端子ａ，ｂ
からの各入力信号よりＦＭ帯又はテレビ、電話帯の帯域
に共振された各周波数成分信号を抽出する。またコイル
トランスＬ3は上記入力信号の合成された同様な帯域の
平衡な周波数成分信号を抽出する。コンデンサＣ1，Ｃ2
は直流成分をカットするためのものである。The coil transformers L 1 and L 2 have output terminals a and b.
Each frequency component signal resonated in the FM band, the television band, or the band of the telephone band is extracted from each input signal. Further, the coil transformer L 3 extracts a balanced frequency component signal in a similar band, which is a combination of the input signals. Capacitors C 1 and C 2
Is for cutting the DC component.
【００１０】ガラスアンテナ１の周辺の電界は（１／
２）λ（λは波長）の周期をもって変化をしているた
め、アンテナパターン上では一様な電位分布とはなって
いない。The electric field around the glass antenna 1 is (1 /
2) Since it changes with the period of λ (λ is the wavelength), the potential distribution is not uniform on the antenna pattern.
【００１１】そこで図２（ａ）に示すように、前記出力
端子ａ，ｂ（給電ポイント）においてある瞬間では、ガ
ラスパターンの左側と右側では位相の異なる電界により
誘起する信号ｉ1，ｉ2が出力され、コイルトランス
Ｌ1，Ｌ2によって各信号から異なった不平衡な周波数成
分信号ｉ1，ｉ2が抽出される。Therefore, as shown in FIG. 2A, at a certain moment at the output terminals a and b (feeding points), signals i 1 and i 2 induced by electric fields having different phases on the left side and the right side of the glass pattern are generated. The unbalanced frequency component signals i 1 and i 2 that are different from each other and are output from the respective signals are extracted by the coil transformers L 1 and L 2 .
【００１２】また図２（ｂ）において、ガラスアンテナ
パターン上に誘起した信号ｉ1とｉ2は、位相が異なって
いるため、ｉ1とｉ2の差又は和の合成信号｜ｉ1＋ｉ2｜
が出力され、コイルトランスＬ3によりｉ1及びｉ2と異
なる信号ｉ’3が抽出される。[0012] In FIG. 2 (b), signals i 1 and i 2 induced in the glass antenna pattern, the phase is different, i 1 and the synthesis of the difference or the sum of i 2 signal | i 1 + i 2 ｜
Is output, and the signal i ′ 3 different from i 1 and i 2 is extracted by the coil transformer L 3 .
【００１３】なお、本発明において、アンテナは熱線を
利用したアンテナに限定されるものではなく、例えば、
図３に示すように熱線４の周囲にループ状に設けた導体
５をアンテナとして用いてもよい。In the present invention, the antenna is not limited to an antenna utilizing heat rays, and for example,
As shown in FIG. 3, the conductor 5 provided in a loop shape around the heating wire 4 may be used as an antenna.
【００１４】[0014]
【発明の効果】以上説明したように本発明によれば、少
なくとも１つのループ状アンテナより２種類以上の信号
を抽出することができる。従って、多チャンネルアンテ
ナ化が可能で、ダイバーシティ受信アンテナ装置を簡単
かつ安価に構成でき、回路構成が簡易で、しかもトラン
ジスタ、ＦＥＴ等の能動素子を使用していないことか
ら、強電界下でも歪発生がない。As described above, according to the present invention, two or more kinds of signals can be extracted from at least one loop antenna. Therefore, a multi-channel antenna can be used, a diversity receiving antenna device can be configured easily and inexpensively, the circuit configuration is simple, and no active elements such as transistors and FETs are used, so that distortion occurs even under a strong electric field. There is no.
【図１】本発明の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention.
【図２】上記実施例の動作説明図である。FIG. 2 is an operation explanatory diagram of the above embodiment.
【図３】本発明の他の実施例を示す図である。FIG. 3 is a diagram showing another embodiment of the present invention.
１ ガラスアンテナ ２ チョークコイル ３ 信号分離回路 Ｌ1，Ｌ2，Ｌ3 コイルトランス Ｃ1，Ｃ2 コンデンサ1 glass antenna 2 choke coil 3 signal separation circuit L 1 , L 2 , L 3 coil transformer C 1 , C 2 capacitor
Claims (5)
抽出する不平衡信号抽出手段と、 を備えたことを特徴とする信号分離装置。1. A signal separation device comprising: at least one loop antenna; and an unbalanced signal extraction means for extracting different frequency component signals from both output terminals of the antenna.
号成分を抽出する平衡信号抽出手段を備えたことを特徴
とする請求項１に記載の信号分離装置。2. The signal separating apparatus according to claim 1, further comprising a balanced signal extracting means for extracting a balanced signal component from the combined signal of the output signals.
帯域に共振された少なくとも２つのコイルトランスを含
むことを特徴とする請求項１又は２に記載の信号分離装
置。3. The signal separating apparatus according to claim 1, wherein the unbalanced signal extracting means includes at least two coil transformers that are resonated in respective predetermined bands.
れたデフォッガーパターンから成ることを特徴とする請
求項１又は２に記載の信号分離装置。4. The signal separation device according to claim 1, wherein the antenna is formed of a defogger pattern embedded in a window glass of a vehicle.
れたデフォッガーパターンの周囲にループ状に設けられ
た導体から成ることを特徴とする請求項１又は２に記載
の信号分離装置。5. The signal separating apparatus according to claim 1, wherein the antenna is formed of a conductor provided in a loop shape around a defogger pattern embedded in a window glass of a vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12980294A JP3563441B2 (en) | 1994-05-18 | 1994-05-18 | Signal separation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12980294A JP3563441B2 (en) | 1994-05-18 | 1994-05-18 | Signal separation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07312514A true JPH07312514A (en) | 1995-11-28 |
| JP3563441B2 JP3563441B2 (en) | 2004-09-08 |
Family
ID=15018595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12980294A Expired - Fee Related JP3563441B2 (en) | 1994-05-18 | 1994-05-18 | Signal separation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3563441B2 (en) |
-
1994
- 1994-05-18 JP JP12980294A patent/JP3563441B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3563441B2 (en) | 2004-09-08 |
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