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

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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 requ

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

Examples

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Example Embodiment

[0039] Example 1:

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

[0041] S1. Build an interferometer antenna array;

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

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

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

Example Embodiment

[0084] Embodiment 2:

[0085] The following description will be given in conjunction with an implementation example of a 4-element antenna array.

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

[0087] Perform horizontal and vertical polarization correction on the interferometer antenna array in an anechoic chamber, and obtain the array flow pattern in the horizontal and vertical polarization states of the array and . The corrected angle range is consistent with the direction finding field of view range, the corrected frequency band is consistent with the required me...

Example Embodiment

[0092] Embodiment three:

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

[0094] a building module 101 for building an interferometer antenna array;

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

[0096] The correction module 103 is used to measure the direction of the incoming wave by the interferometer direction finding method, and obtain the correction value corresponding to the direction of the incoming wave 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 ...

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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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