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Echo simulation device for Doppler radar and implementation method thereof

A Doppler radar and echo simulation technology, applied in the field of Doppler radar echo simulation devices, can solve the problems that the radio frequency part of the Doppler radar cannot be detected, the antenna is faulty, technical difficulty and high cost

Active Publication Date: 2012-05-02
SHAANXI CHANGLING ELECTRONICS TECH
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Problems solved by technology

[0003] At present, domestic and foreign Doppler radars basically use intermediate frequency simulators. This type of simulator is to add the Doppler signal from the intermediate frequency part of the Doppler radar, and then test it, while the echo simulator is Adding the Doppler signal from the antenna of the Doppler radar, the technical difficulty and cost are much higher than that of the IF simulator
[0004] Moreover, the existing IF simulator cannot detect the radio frequency part of the Doppler radar, resulting in some problems in the actual use process that cannot be exposed in the laboratory, such as the antenna is out of order

Method used

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  • Echo simulation device for Doppler radar and implementation method thereof
  • Echo simulation device for Doppler radar and implementation method thereof
  • Echo simulation device for Doppler radar and implementation method thereof

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] refer to figure 1 , The Doppler radar transmits a 4-beam ICW (intermittent continuous wave) microwave signal with a frequency of 13.325GHz±0.5MHz, the period of each beam is 25.5ms, and the first 6.8ms of each beam is the microwave suppression time. The echo signal is in the form of 4-beam ICW with a frequency of 13.325GHz±0.5MHz±f d For a noisy microwave signal, the timing should be delayed with height.

[0034] refer to figure 2 , Doppler radar time-sharing transmit frequency through the antenna is f 0 The signals of the four beams A, B, C, and D of =13.325 GHz are transmitted to the switch attenuation component or combined attenuation component through the antenna coupler, and are converted to a channel, and the frequency is f after down-conversion 中 = 10.7MHz IF signal, then with Doppler frequency f d Modulation, use ...

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Abstract

The invention discloses an echo simulation device for a Doppler radar. The echo simulation device comprises an antenna coupler, a switch attenuation component or a route-combination attenuation component, a frequency conversion unit, a modulation unit and an echo acquirer, wherein the antenna coupler can be used for directly receiving a signal transmitted by an antenna of the Doppler radar; the switch attenuation component or the route-combination attenuation component is arranged between the antenna coupler and the frequency conversion unit; a down-conversion output end of the frequency conversion unit outputs an intermediate-frequency signal; and the intermediate-frequency signal is output to an up-conversion input end of the frequency conversion unit through the modulation unit and theecho acquirer sequentially. The echo simulation device can be used for comprehensively detecting the Doppler radar, so that the research and development cost of the Doppler radar can be effectively reduced.

Description

technical field [0001] The invention relates to a Doppler radar echo simulation device and methods for antenna coupling, coherent frequency conversion, Doppler frequency modulation, digital controllable delay and controllable attenuation. Background technique [0002] The Doppler radar simulator is used for the whole machine test of the Doppler radar, which can verify the working conditions and the whole machine parameters during the use of the Doppler radar in the laboratory. [0003] At present, domestic and foreign Doppler radars basically use intermediate frequency simulators. This type of simulator is to add the Doppler signal from the intermediate frequency part of the Doppler radar, and then test it, while the echo simulator is Adding the Doppler signal from the antenna of the Doppler radar is much more difficult and costly than the IF simulator. [0004] Moreover, the existing IF simulator cannot detect the radio frequency part of the Doppler radar, resulting in som...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
Inventor 徐自明
Owner SHAANXI CHANGLING ELECTRONICS TECH
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