Multichannel radar amplitude and phase automatic correcting method and device

An automatic correction and multi-channel technology, applied in the radar field, can solve problems such as inconvenient use and maintenance, inability to apply broadband systems, and poor environmental applicability, and achieve the effects of shortening the test process time, improving self-detection capabilities, and real-time calibration

Inactive Publication Date: 2011-01-26
中国船舶重工集团公司第七二三研究所
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Problems solved by technology

When the frequency band changes, re-testing is required to correct the length of the feeder, so it is not suitable for broadband systems,

Method used

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  • Multichannel radar amplitude and phase automatic correcting method and device
  • Multichannel radar amplitude and phase automatic correcting method and device
  • Multichannel radar amplitude and phase automatic correcting method and device

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0036] There are at least three receiving channels in the monopulse tracking radar. In order to obtain the angle from which the target deviates from the radar axis, the receiving system must ensure that the phase and amplitude characteristics of the sum path, azimuth path, and elevation angle path in the entire frequency band maintain a relatively strict consistency. .

[0037]Therefore, the present invention provides a multi-channel radar amplitude and phase automatic correction method, the basic idea of ​​which is: before the radar system works, the same radio frequency test signal is respectively fed into each receiving channel of the multi-channel radar system through a feed source, and each receiving channel is obtained. The phase characteristics and amplitude characteristics of the receiving channel, using one of the channel signals as the reference sig...

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Abstract

The invention discloses multichannel radar amplitude and phase automatic correcting method and device. The method comprises the following steps of: before a radar system works, respectively feeding the same radio frequency test signal into various receiving channels of a multichannel radar system by a feed source to obtain the phase characteristic and the amplitude characteristic of various receiving channels; calculating a phase difference and an amplitude specific value between other channel signals and a reference signal by using one of channel signals as a reference signal; and then enabling the radar system to work, carrying out automatic correction on target echoes of all the channels by utilizing the obtained phase difference and the amplitude specific value so as to ensure the consistency of all the channels on amplitudes and phases. When a transmission frequency point is changed or a radar working environment is changed, the amplitude and phase characteristics of the receiving channels are unavoidably changed; and the invention can accurately and conveniently measure and correct the change of the amplitude and phase characteristic and ensure the consistency of all the channels, thereby expanding the working frequency range and the environmental adaptability of radar and improving the maintainability of the radar.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a method and device for automatically correcting amplitude and phase of multi-channel radar. Background technique [0002] The monopulse tracking radar requires that the three receiving channels of the receiving system, such as the sum road, the azimuth difference road and the elevation angle difference road, have strict phase and amplitude consistency in the radar working frequency band. In actual engineering, due to the differences between components and transmission lines, The phase and amplitude of these three channels must be compensated and adjusted. [0003] At present, the commonly used calibration method in China is to use the signal source set up in the far field of the antenna to test one by one, and adjust the feeder length of the high frequency and intermediate frequency terminals according to the test results. This method is easy to implement and low in cost, but it n...

Claims

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Application Information

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IPC IPC(8): G01S7/40G01S13/02
Inventor 徐洪林吴海徐朝阳刘国华陈永森
Owner 中国船舶重工集团公司第七二三研究所
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