Phased array amplitude phase inversion method based on mode filtering

Abstract

The invention provides a phased array amplitude phase inversion method based on mode filtering. The phased array amplitude phase inversion method mainly solves the problem that the working state of a phased array unit cannot be rapidly and accurately monitored in the prior art. According to the implementation scheme, the method comprises the steps of collecting a far-field pattern of a to-be-measured phased-array antenna, performing coordinate translation on the far-field pattern, performing spherical wave expansion and mode filtering to filter high-order mode items, and obtaining a radiation field of a radiation unit of the to-be-measured phased-array antenna; constructing a phased array model according to the to-be-tested phased array antenna; acquiring a radiation field of a radiation unit in the phased array model, and performing coordinate translation on the radiation field; and inverting the feed amplitude phase of the radiation unit of the phased-array antenna by using the radiation field of the radiation unit after coordinate translation in the phased-array model and the radiation field of the radiation unit of the phased-array antenna to be measured. According to the method, the feed amplitude phase of the phased-array antenna unit can be quickly inverted, the external detection and calibration speed can be improved, the requirement on a calibration system can be reduced, the method can be used for phased-array antennas with different complex structures, and the working condition of each unit of the antenna can be effectively monitored.

Description

technical field [0001] The invention belongs to the field of electromagnetic technology, and in particular relates to a phased array amplitude phase inversion method, which can be used for phased array unit feeding amplitude and phase inversion. Background technique [0002] Phased array antenna technology has developed rapidly in recent years and is widely used in communication, radar and other systems. Array antennas typically use an active network such as T / R components to control the feeding of the radiating elements for better beamforming and direction steering. Due to the aging and temperature characteristics of active components, phased array antennas will inevitably be damaged and malfunction during daily work, resulting in the failure of the phased array radiation unit, resulting in a decline in antenna performance. Therefore, when the phased array antenna fails, it is necessary to monitor the working status of the phased array radiation unit. [0003] In the prio...

AI Technical Summary

Problems solved by technology

However, this technology needs to compare the calculated aperture field distribution with the amplitude and phase distribution of the actual physical position on the oral surface. For arrays with complex structures, when the actual physical positions of multiple array elements on the oral surface are blocked or overlapped, It is impossible to accurately obtain the feed amplitude and phase of each array element, and when the phased array antenna fails, the working status of each radiation unit of the phased array antenna cannot be monitored

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