Broadband coherent radar target simulator

A technology of target simulator and radar simulator, which is applied in the direction of instruments, radio wave measurement systems, etc., can solve the problems of imaging error and high-resolution radar simulator that cannot meet the requirements of ultra-bandwidth, so as to ensure stability and meet the requirements of high-bandwidth Resolution radar test requirements, effect of ensuring circuit symmetry

Active Publication Date: 2012-07-18
BEIHANG UNIV
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Problems solved by technology

Modern Radar, 2008, 30(8): 31-32), however, the bandwidth of modern broadband radar reaches 1 GHz or more, and the high-resolution radar simulator developed by Liu Yi, Wang

Method used

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Embodiment Construction

[0037] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0038] Such as figure 1 Shown, a kind of broadband coherent radar target simulator of the present invention is made of receiving end, transmitting end, power splitter, down mixer, up mixer, instantaneous measurement receiver, DSP processor, interference modulator, Composed of PC (target scattering model), target echo delay compensation, frequency modulation step frequency local oscillator source, and high-resolution radar signal simulation module; the positional connection relationship and signal direction between them are: the shipborne radar emits x-band Broadband FM stepping frequency signal, the horn antenna connected to the radar simulator through a low-loss cable receives the wideband FM stepping frequency signal emitted by the shipboard radar, and the FM stepping frequency local oscillator source generates x-band local oscillator signal...

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Abstract

A broadband coherent radar target simulator is composed of a receiving end, a transmitting end, a power divider, a lower mixer, an upper mixer, an instantaneous measurement receiver, a DSP processor, an interference modulator, a PC, a target echo delay compensation, a frequency modulation step frequency local oscillator and a high resolution radar signal simulation module. A shipborne radar transmits an X-wave band frequency modulation step frequency signal, a radar simulator receives the signal via a horn antenna, and the frequency modulation step frequency local oscillator generates a local oscillator signal; an intermediate frequency signal is generated after the dechirp processing of the lower mixer and is divided into two signals by the power divider, with one signal sent to the instantaneous measurement receiver to complete the measurements of radar carrier frequency signal, radar pulse repetition period, pulse width and pulse amplitude parameter, and with the other one sent to the high resolution radar signal simulation module to complete the simulation of a high resolution one dimensional object range image; the target echo delay compensation is used to solve the increase RMS attenuation problem of a dechirp time delay, and the compensated intermediate frequency signal is sent to the interference modulator. The broadband coherent radar target simulator of the invention is scientific in conception, less in use device number and low in cost.

Description

technical field [0001] The invention relates to a wideband coherent radar target simulator (abbreviated as a radar simulator), which belongs to the technical field of wideband radar target signal simulation verification. test. Background technique [0002] With instantaneous ultra-bandwidth radar, because of its high range resolution, strong anti-interference ability, excellent target detection and recognition ability, etc., it has been widely valued by countries all over the world. For example, the ground-based imaging radar (GBR) deployed by the United States has a center frequency of The x-band, instantaneous bandwidth is 1GHz, the detectable distance is 4000Km, and the distance resolution is 15cm; the x-band active shipborne radar APAR jointly developed by Germany, Canada and the Netherlands (Wen Shuliang, Yuan Qi, Qin Zhongyu. Broadband phased array Design criteria and development direction of radar [J]. Systems Engineering and Electronic Technology, 2010, 27(6): 1007-...

Claims

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Application Information

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IPC IPC(8): G01S7/40
Inventor 冯文全王春刚赵琦邢小地方勇孙泽斌
Owner BEIHANG UNIV
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