Method and device for correcting direction finding accuracy of ultra-wideband multi-beam system

A correction method and multi-beam technology, which is applied to direction finders using electromagnetic waves, electromagnetic directional device monitoring/calibration, etc., can solve the problems of easy deterioration of system direction finding accuracy and easy deterioration of direction finding accuracy, and achieve simple and convenient engineering implementation performance and improve the direction finding accuracy of the system

Active Publication Date: 2019-04-05
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the direction finding accuracy of the existing system is easy to deteriorate, especially when the target frequency deviates from the center frequency

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  • Method and device for correcting direction finding accuracy of ultra-wideband multi-beam system
  • Method and device for correcting direction finding accuracy of ultra-wideband multi-beam system

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Embodiment Construction

[0040] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0041] Such as Figure 1 ~ Figure 4 As shown, the device for improving the direction-finding accuracy based on the ultra-wideband detection of the Rotman lens in this embodiment includes an antenna array 8, a radio frequency front end 9, an array control 10, a Rotman lens 11 (40 beam outputs), Switch 12, calibration source 1, calibration network 2, calibration processing board 4, calibration receiver 5, darkroom plane test system 7, radio frequency cable 3 and optical fiber 6; connected, the calibration signal is transmitted to the calibration network 2; the calibration network 2 is connected to the system under t...

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Abstract

The invention discloses a method and a device for correcting direction finding accuracy of an ultra-wideband multi-beam system. The method comprises: testing the intermediate beam of the system usinga microwave darkroom planar test system, and recording the planar near-field test data; obtaining the amplitude phase distribution information of an antenna unit aperture field according to the inversion of the obtained planar near-field test data; determining whether the error of the amplitude phase distribution information of the antenna aperture field and the theoretical value satisfies the requirement; testing all beams and full bands of the system using the microwave darkroom planar test system; writing the direction finding table into the system according to the far field pattern of theobtained planar near-field data inversion system; and inputting the calculated code value to obtain the correction parameters for each channel after the beam correction compensation is completed. Themethod and device have simple and convenient engineering implementation, can improve the direction finding accuracy of the system, especially in the case that the target frequency deviates from the center frequency and the target bearing deviates from the intermediate beam, which is beneficial to the subsequent target tracking processing.

Description

technical field [0001] The invention relates to a broadband active phased array system, in particular to a method and device for correcting direction finding accuracy of an ultra-wideband multi-beam system. Background technique [0002] In order to adapt to the detection and reception requirements of various electronic signals under complex electromagnetic environment conditions, the requirements of high gain, large instantaneous bandwidth, wide airspace coverage, large dynamic range, and high direction-finding accuracy are put forward for the antenna system. The Rotman lens is a low-profile, light-weight, and small-volume true-time-delay network that can realize broadband signal beamforming under wide-sweep angle conditions. The multi-beam antenna system based on Rotman lens has the characteristics of high omnidirectional intercept probability, large dynamic range, high sensitivity, and multi-target tracking. Due to the inconsistency of the material, processing and assembl...

Claims

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Application Information

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IPC IPC(8): G01S3/78
CPCG01S3/7803
Inventor 杨宇宸向海生夏润梁卢晓鹏张德智刘浩黄俊园
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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