JPH0167841U - - Google Patents
Info
- Publication number
- JPH0167841U JPH0167841U JP1987162469U JP16246987U JPH0167841U JP H0167841 U JPH0167841 U JP H0167841U JP 1987162469 U JP1987162469 U JP 1987162469U JP 16246987 U JP16246987 U JP 16246987U JP H0167841 U JPH0167841 U JP H0167841U
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- switching circuit
- receiving
- send
- input
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Filters And Equalizers (AREA)
- Transceivers (AREA)
Description
第１図および第２図はこの考案の実施例を示す
ものであつて、第１図はアンテナ切換回路の全体
構成を示す回路図、第２図は受信アンテナ入力と
受信フロントエンド部への出力を示す特性図であ
る。第３図および第４図は従来例を示すものであ
つて、第３図はアンテナ切換回路の全体構成を示
す回路図、第４図は受信アンテナ入力と受信フロ
ントエンド部への出力を示す特性図である。
主要部分の符号の説明、ＡＮＴ：アンテナ、Ｒ
Ａ：受信フロントエンド部への出力端、λ／４：
λ／４線路、Ｃ１：コンデンサ、Ｄ１，Ｄ２：ス
イツチング・ダイオード、１：高周波出力段（送
信）、２：切換え制御信号入力端。
Figures 1 and 2 show an embodiment of this invention, with Figure 1 being a circuit diagram showing the overall configuration of the antenna switching circuit, and Figure 2 showing the receiving antenna input and output to the receiving front end section. FIG. Figures 3 and 4 show conventional examples, with Figure 3 being a circuit diagram showing the overall configuration of the antenna switching circuit, and Figure 4 showing the characteristics of the receiving antenna input and output to the receiving front end section. It is a diagram. Explanation of symbols of main parts, ANT: antenna, R
A: Output end to reception front end section, λ/4:
λ/4 line, C1: capacitor, D1, D2: switching diode, 1: high frequency output stage (transmission), 2: switching control signal input terminal.
Claims (1)
はアンテナ入力信号を受信フロントエンド部へ送
るように構成されたアンテナ切換回路において、 λ／４線路に並列にコンデンサを接続して共振
特性をもたせ、受信アンテナ入力周波数の中で、
受信フロントエンドへ入力したくない周波数帯を
減衰させるように構成したことを特徴とするアン
テナ切換回路。[Claim for Utility Model Registration] In an antenna switching circuit configured to send a high frequency output to an antenna during transmission and send an antenna input signal to a receiving front end section during reception, a capacitor is connected in parallel to the λ/4 line. Connected to provide resonance characteristics, within the receiving antenna input frequency,
An antenna switching circuit characterized in that it is configured to attenuate frequency bands that are not desired to be input to a receiving front end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987162469U JPH0167841U (en) | 1987-10-26 | 1987-10-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987162469U JPH0167841U (en) | 1987-10-26 | 1987-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0167841U true JPH0167841U (en) | 1989-05-01 |
Family
ID=31446325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987162469U Pending JPH0167841U (en) | 1987-10-26 | 1987-10-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0167841U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5933936A (en) * | 1982-08-19 | 1984-02-24 | Pioneer Electronic Corp | Switching circuit of transmitting and reception |
-
1987
- 1987-10-26 JP JP1987162469U patent/JPH0167841U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5933936A (en) * | 1982-08-19 | 1984-02-24 | Pioneer Electronic Corp | Switching circuit of transmitting and reception |
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