JPS645183U

JPS645183U -

Info

Publication number: JPS645183U
Application number: JP9893287U
Authority: JP
Priority date: 1987-06-26
Filing date: 1987-06-26
Publication date: 1989-01-12

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すブロツク回路
図、第２図はこの実施例の各部信号を示すタイミ
ング図、第３図は本実施例の高周波減衰器を示す
回路図、第４図は従来のトランスポンダを示すブ
ロツク回路図、第５図は第４図トランスポンダに
おける各部信号を示すタイミング図である。１……サーキユレータ、２……プリセレクタ、
３……高周波減衰器、４……受信回路、５……送
信機、６，７……受信機、１１，１２……受信信
号、１３……高周波減衰器の出力信号、１４……
トリガー、１５……応答信号、１６……ゲート信
号、１１ａ，１２ａ，１３ａ……質問信号、１１
ｂ，１２ｂ，１４ａ，１５ａ……応答信号、１１
ｃ，１２ｃ，１４ｃ，１５ｃ……ランダムパルス
、２１，２２……ダイオード、２３〜２５……コ
ンデンサ、２６……高周波コイル、２７……抵抗
器、１０１〜１０６……信号線。 Fig. 1 is a block circuit diagram showing one embodiment of the present invention, Fig. 2 is a timing diagram showing various signals of this embodiment, Fig. 3 is a circuit diagram showing the high frequency attenuator of this embodiment, and Fig. 4. 5 is a block circuit diagram showing a conventional transponder, and FIG. 5 is a timing diagram showing signals of various parts in the transponder of FIG. 1...Circulator, 2...Preselector,
3... High frequency attenuator, 4... Receiving circuit, 5... Transmitter, 6, 7... Receiver, 11, 12... Received signal, 13... Output signal of high frequency attenuator, 14...
Trigger, 15...Response signal, 16...Gate signal, 11a, 12a, 13a...Question signal, 11
b, 12b, 14a, 15a...response signal, 11
c, 12c, 14c, 15c...Random pulse, 21, 22...Diode, 23-25...Capacitor, 26...High frequency coil, 27...Resistor, 101-106...Signal line.

Claims

[Scope of utility model registration request]

a preselector that selectively passes an interrogation signal of an assigned frequency; a reception circuit that decodes the interrogation signal supplied from the preselector to generate a response signal; and a reception circuit that generates a response signal supplied from the reception circuit. In the Takan ground equipment comprising a transmitter that converts the high-frequency signal into a high-frequency signal and transmits the high-frequency signal, a high-frequency attenuator is interposed in the high-frequency line between the preselector and the receiving circuit, and the transmitter transmits the high-frequency signal. 1. A Takan ground device with an unnecessary wave suppression function, characterized in that the high frequency attenuator attenuates the high frequency signal during a certain period of the gate signal, and the high frequency attenuator attenuates the high frequency signal during a certain period of the gate signal.