JPH0360090U

JPH0360090U -

Info

Publication number: JPH0360090U
Application number: JP11987389U
Authority: JP
Priority date: 1989-10-14
Filing date: 1989-10-14
Publication date: 1991-06-13

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を示すブロツク図
、第２図は従来の装置の一実施例を示すブロツク
図であり、図において、１……第１の可変減衰器
、２……第１のローノイズアンプ、３……第１の
ミキサ、４……第１のＩＦアンプ、５……第２の
可変減衰器、６……第１のバンドパスフイルタ、
７……第２のミキサ、８……第２のバンドパスフ
イルタ、９……第２のＩＦアンプ、１０……第３
のミキサ、１１……第１のビデオアンプ、１２…
…第１のローパスフイルタ、１３……第３の可変
減衰器、１４……第２のローノイズアンプ、１５
……第４のミキサ、１６……第３のＩＦアンプ、
１７……第４の可変減衰器、１８……第３のバン
ドパスフイルタ、１９……第５のミキサ、２０…
…第４のバンドパスフイルタ、２１……第４のＩ
Ｆフイルタ、２２……第６のミキサ、２３……第
２のビデオアンプ、２４……第２のローパスフイ
ルタ、２５……検波回路、２６……利得制御回路
、２７……第１の電力分配器、２８……第２の電
力分配器、２９……第１のサンプルアンドホール
ド、３０……第２のサンプルアンドホールド、３
１……マルチプレクサ、３２……利得制御値計算
機、３３……Ｄ／Ａコンバータである。なお、各
図中同一符号は同一又は相当部分を示す。 Fig. 1 is a block diagram showing an embodiment of this invention, and Fig. 2 is a block diagram showing an embodiment of a conventional device. 1 low noise amplifier, 3... first mixer, 4... first IF amplifier, 5... second variable attenuator, 6... first band pass filter,
7...Second mixer, 8...Second band pass filter, 9...Second IF amplifier, 10...Third
mixer, 11... first video amplifier, 12...
...First low-pass filter, 13...Third variable attenuator, 14...Second low-noise amplifier, 15
...4th mixer, 16...3rd IF amplifier,
17...Fourth variable attenuator, 18...Third bandpass filter, 19...Fifth mixer, 20...
...Fourth band pass filter, 21...Fourth I
F filter, 22...Sixth mixer, 23...Second video amplifier, 24...Second low-pass filter, 25...Detection circuit, 26...Gain control circuit, 27...First power distribution 28...Second power divider, 29...First sample and hold, 30...Second sample and hold, 3
1... Multiplexer, 32... Gain control value calculator, 33... D/A converter. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

A first variable attenuator to which the RF signal of the sum channel of the monopulse radar is input; a first low-noise amplifier connected to the output of the first variable attenuator; a first mixer into which a local oscillation signal of 1 is input;
A first IF amplifier connected to the output terminal of this first mixer, a second variable attenuator connected to the output terminal of this first IF amplifier, and an output of this second variable attenuator. A first bandpass filter is inputted, a second mixer is inputted with the output of the first bandpass filter and a second local oscillation signal, and a second mixer is connected to the output terminal of the second mixer. a second IF amplifier to which the output of the second bandpass filter is input; a third mixer to which the output of the second IF amplifier and a coherent local oscillation signal are input; A first video amplifier connected to the output end of the third mixer, a first low-pass filter to which the output of the first video amplifier is input, and a first low-pass filter connected to the output end of the first low-pass filter. a first power divider, a first sample-and-hold circuit connected to the output terminal of the first power divider, and a third variable attenuator to which the RF signal of the difference channel of the monopulse radar is input. a second low-noise amplifier connected to the output of the third variable attenuator; a fourth mixer to which the output of the second low-noise amplifier and the first local oscillation signal are input; The third IF connected to the output terminal of the mixer
an amplifier, a fourth variable attenuator connected to the output terminal of the third IF amplifier, a third bandpass filter to which the output of the fourth variable attenuator is input; The output of the pass filter and
a fifth mixer into which the second local oscillation signal is input; a fourth bandpass filter connected to the output terminal of the fifth mixer; and an output from the fourth bandpass filter. a fourth IF amplifier, a sixth mixer into which the output of the fourth IF amplifier and the coherent local oscillation signal are input, and a second video amplifier connected to the output end of the sixth mixer; a second low-pass filter to which the output of the second video amplifier is input; and a second low-pass filter connected to the output terminal of the second low-pass filter.
a power divider, a second sample-and-hold circuit connected to the output terminal of the second power divider, and an output of the second sample-and-hold circuit and an output of the first sample-and-hold circuit. A connected multiplexer, a gain control calculation circuit connected to the output end of this multiplexer, a D/A converter connected to the output end of this gain control calculation circuit, and an output terminal of this D/A converter. The first and second
, a third and fourth variable attenuator, and a second and fourth IF amplifier.