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Polarization measurement method and system for improving array direction finding precision, and storage medium

A measurement method and direction finding technology, applied in radio wave measurement systems, direction finders for direction determination, direction finders using radio waves, etc. Problems such as the influence of electromagnetic reflection on the surrounding installation platform environment, etc., to achieve the effects of insensitive polarization purity, good real-time performance, and easy implementation

Active Publication Date: 2022-04-29
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In engineering, the implementation of polarization measurement through orthogonally polarized antennas is limited by many factors, such as the requirement that the phase centers of the two antennas coincide, the high polarization purity requirements of the antenna itself, the difficulty of adapting to ultra-wideband polarization measurement, and the possibility of being easily affected by the electromagnetic environment of the surrounding installation platform. reflection effects etc.

Method used

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  • Polarization measurement method and system for improving array direction finding precision, and storage medium
  • Polarization measurement method and system for improving array direction finding precision, and storage medium
  • Polarization measurement method and system for improving array direction finding precision, and storage medium

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Embodiment 1

[0040] see figure 1 , the present invention provides an embodiment of a polarization measurement method for improving the accuracy of array direction finding, the method comprising the following steps:

[0041] S1, building an interferometer antenna array;

[0042] S2. Calibrate the interferometer antenna array to obtain array flow patterns of the interferometer antenna array in different polarization states;

[0043] Specifically, performing calibration on the interferometer antenna array includes performing horizontal and vertical polarization calibration or other orthogonal polarization calibration on the interferometer antenna array. Wherein, other orthogonal polarizations may be right-handed circular polarizations or ±45-degree oblique polarizations.

[0044] Specifically, the array flow pattern is a horizontally polarized wave and a vertically polarized wave or other orthogonally polarized waves respectively received by each element unit in the interferometer antenna a...

Embodiment 2

[0085] The following describes an implementation example of a 4-element antenna array.

[0086] see figure 2 , the antenna array includes 3 left-handed circularly polarized helical antennas and 1 right-handed circularly polarized helical antenna, and the 3 left-handed circularly polarized helical antennas constitute a traditional 3-unit single-polarization interferometer antenna array. On the basis of the 3-unit single-polarization interferometer antenna array, a right-handed circularly polarized helical antenna is added.

[0087] Correct the horizontal and vertical polarization of the interferometer antenna array in the microwave anechoic chamber, and obtain the array flow patterns of the array in the horizontal and vertical polarization states and . The corrected angle range is consistent with the range of the direction-finding field of view, the corrected frequency band is consistent with the required measurement frequency band, and the array flow pattern is processed...

Embodiment 3

[0093] see Figure 4 , the present invention also provides an embodiment of a polarization measurement system for improving the accuracy of array direction finding, including:

[0094] Construction module 101, for constructing interferometer antenna array;

[0095] An acquisition module 102, configured to calibrate the interferometer antenna array, and acquire array flow patterns of the interferometer antenna array in different polarization states;

[0096] The correction module 103 is used to measure the incoming wave direction by the interferometer direction finding method, and obtain the correction value corresponding to the incoming wave direction according to the array flow pattern;

[0097] The calculation module 104 is configured to calculate the horizontal polarization component and the vertical polarization component through polarization decomposition according to the correction value corresponding to the incoming wave direction, so as to obtain the polarization para...

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Abstract

The invention discloses a polarization measurement method and system for improving array direction finding precision and a storage medium. The method comprises the following steps: constructing an interferometer antenna array; the interferometer antenna array is corrected, and array flow patterns of the interferometer antenna array in different polarization states are obtained; measuring an incoming wave direction through an interferometer direction finding method, and obtaining a correction value corresponding to the incoming wave direction according to the array flow pattern and the incoming wave direction; and calculating the polarization parameter of the incoming wave according to the correction value corresponding to the incoming wave direction. Two antenna units are not required to be orthogonal and phase centers are not required to be overlapped, the antenna is not required to be rotated by 90 degrees, the antenna is not sensitive to polarization purity of the antenna and an antenna array platform environment, and the method is suitable for polarization measurement in an ultra-wideband and large-view-field range. The polarization characteristic of the incoming wave signal can be conveniently and accurately measured in real time.

Description

technical field [0001] The invention relates to the technical field of antenna engineering or array signal processing, in particular to a polarization measurement method, system and storage medium for improving the accuracy of array direction finding. Background technique [0002] Information such as frequency, repetition frequency, pulse width, amplitude, direction of arrival, and polarization are important attributes of radar signals. Usually, frequency, repetition frequency, pulse width, and amplitude can be directly measured by a digital receiver, and the direction of arrival is generally obtained through interference. The direction finding method of the interferometer can be measured, but the polarization information is not easy to measure. At the same time, polarization is one of the important factors affecting the direction finding accuracy of the interferometer. [0003] The interferometer direction finding method is widely used in the field of electronic countermeas...

Claims

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Application Information

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IPC IPC(8): G01S3/14G01S3/48
CPCG01S3/146G01S3/48
Inventor 朱全江王浩丞沈志博刘俊唐勇
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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