JPH01128186U

JPH01128186U -

Info

Publication number: JPH01128186U
Application number: JP2462788U
Authority: JP
Priority date: 1988-02-26
Filing date: 1988-02-26
Publication date: 1989-09-01

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す構成図、第
２図は第１図に示すミキサからの受信系路の詳細
図、第３図は従来の実施例を示す図である。図において、１はアンテナ、２は送信機部、３
は送受切換部、４はミキサ、５はローカル信号発
生部、６は中間周波増幅器、７はコヒーレントオ
ツシレータ、８は位相検波器、９は消去器、１０
はスコープ、１１は低周波用ミキサ、１２は電圧
制御水晶発振器、１３はクラツタ操作制御部、１
４は可変抵抗部、１５Ａ〜１５Ｂは電源、１６は
入力信号、１７はｆＩＦ、１８はｆＶＣＸＯ＋ｆ
Ｃ、１９は制御電圧、２０は出力信号である。尚
、図中、同一または相当部分には同一符号を付し
て示してある。 FIG. 1 is a block diagram showing an embodiment of this invention, FIG. 2 is a detailed diagram of a receiving path from the mixer shown in FIG. 1, and FIG. 3 is a diagram showing a conventional embodiment. In the figure, 1 is an antenna, 2 is a transmitter section, and 3
4 is a mixer, 5 is a local signal generator, 6 is an intermediate frequency amplifier, 7 is a coherent oscillator, 8 is a phase detector, 9 is an eraser, 10
1 is a scope, 11 is a low frequency mixer, 12 is a voltage controlled crystal oscillator, 13 is a clutter operation control unit, 1
4 is a variable resistance section, 15A to 15B are power supplies, 16 is an input signal, 17 is fIF, 18 is fVCXO+f
C, 19 is a control voltage, and 20 is an output signal. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

Claims

[Scope of utility model registration request]

A radar device that has the function of searching, detecting, and tracking a target and receives echoes from the target includes a transmitting and receiving antenna that emits high-frequency power pulses to the outside and receives reflected waves from the target, and the above-mentioned high-frequency power A transmitter section that generates pulses, a transmission/reception switching section that switches between transmission and reception, a mixer that converts the received radio waves input from the transmission/reception switching section into an intermediate frequency band, and a mixer that converts the received radio waves into an intermediate frequency band. a local signal generation section that creates a local signal; an intermediate frequency amplifier that amplifies the intermediate frequency signal output from the mixer; and voltage control that cancels out Doppler frequency components of the intermediate frequency signal amplified by the intermediate frequency amplifier. A crystal oscillator, a low frequency mixer for mixing the output of the voltage controlled crystal oscillator and the output of the intermediate frequency amplifier, and further converting the frequency, mixing the outputs of the transmitter section and the local signal generating section, and transmitting the mixture. a coherent oscillator that generates a phase reference signal having phase information of each number; a phase detector that detects the output of the low frequency mixer with the output of the coherent oscillator and outputs it as a video signal; and an output from the phase detector. an eraser for passing the Doppler component if it exists and erasing it if not; a scope for displaying the output video from the eraser; and an operator manually adjusting the oscillation frequency of the voltage-controlled crystal oscillator. It consists of a clutter canceling operation unit for controlling clutter that has a Doppler component that cannot be canceled by the canceler alone. By manually canceling out the Doppler frequency of the clutter, it is possible to eliminate only the moving target from the received echoes. A radar device that is characterized by its ability to detect, search, and track easily.