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Millimeter wave quick frequency conversion radar target simulator

A technology of radar target simulation and frequency converter, which is applied in the direction of simulators, simulators of space navigation conditions, instruments, etc., can solve the problem that DDS is difficult to generate high frequency, etc., and achieve high repeatability, cost reduction, and strong confidentiality Effect

Inactive Publication Date: 2007-12-05
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

Because of these advantages, DDS has been widely used in radar signal simulation, but DDS has the defect that it is difficult to generate high frequencies. In this paper, the spectrum shift method is used to increase the operating frequency of DDS.

Method used

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  • Millimeter wave quick frequency conversion radar target simulator
  • Millimeter wave quick frequency conversion radar target simulator
  • Millimeter wave quick frequency conversion radar target simulator

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] The present invention is a millimeter-wave frequency-agile radar target simulator, which includes a transceiver unit 1 , a distance simulation unit 2 , a Doppler simulation unit 3 , an amplitude simulation unit 4 and a control unit 5 .

[0021] The transceiver unit 1 includes an antenna 21, a circulator 22, a coupler A27, a coupler B23, a phase shifter 24, an electric attenuator 25, a combiner 26, a detector 28 and a cancellation controller 29; the distance The simulation unit 2 includes a distributed feedback (DFB) laser 41, an optical fiber delay array 42, a photoelectric converter 43, a high frequency preamplifier 44, a bandpass filter 45 and a distance controller 46; the Doppler simulation unit 3 includes the following Inverter 31, low-pass filter 30, single sideband filter A 32, mixer A 33, first DDS 341, frequency synthesis source 35, second DDS ...

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Abstract

The invention discloses a frequency-change radar goal emulator of millimeter wave, which comprises the following parts: control unit, transceiver unit, Doppler analog unit, distant analog unit and amplitude analog unit, wherein the radar signal enters into the Doppler analog unit through transceiver unit, which produces middle-frequency signal through lower frequency-changer and low-pass filter of the Doppler analog unit; the upper frequency-changer and band-pass filter group of Doppler analog unit produces RF signal; the difference of local oscillator frequency of upper and lower frequency-changers analogs the Doppler frequency shift of goal; the RF signal generates launching signal through changing the echo amplitude of goal simulated by amplitude analog unit, which is transmitted by transceiver unit; the control unit transmits control signal for other four units according to the analog parameter such as input distance, speed and amplitude; the radar signal passes the emulator to provide an analog signal with Doppler frequency shift, signal amplitude fluctuation and distant delay to radar, which provides estimating platform for working property testing for radar.

Description

technical field [0001] The invention relates to the semi-physical radio frequency simulation of a radar whose working frequency band is in the millimeter wave band and adopts a frequency-agile system. Provide an evaluation platform for the radar to conduct dynamic simulation tests indoors to detect its working performance, specifically, it refers to a millimeter-wave agility radar target simulator. Background technique [0002] In recent years, more and more attention has been paid to radars working in the millimeter-wave frequency band. They are used in surveillance and detection, fire control and tracking, precision guidance, measurement, high-resolution imaging, space technology, meteorology, environmental remote sensing, obstacle avoidance and other military and It is widely used in civil field. Radars of various systems have also been put into use one after another. For example, the commonly used frequency agility system has been applied in various types of missiles as...

Claims

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Application Information

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IPC IPC(8): G01S7/40G01S13/00G09B9/40
Inventor 洪韬彭刚田进军刘林孙文波薛明华王振荣
Owner BEIHANG UNIV
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