Spherical phased-array antenna coordinate far and near field comparison and correction method

Abstract

The invention provides a spherical phased-array antenna coordinate far and near field comparison and correction method, which is small in hardware resource consumption, simple and easy to implement. According to the technical scheme, the method is characterized in that a vertical cylindrical surface of a sphere center of a spherical array antenna is divided into three horizontal sections at equal intervals, far and near field calibration antennas are arranged according to each section, on each horizontal plane, near-field calibration antennas which surround the spherical array antenna to form six near-field calibration coverage area measurement field points and three far-field calibration coverage area far-field calibration antennas are arranged at equal intervals by taking the sphere center on the tangent plane as an original point, through a far-field test and a near-field test, a far-field and near-field comparison method is given to correct array element coordinates, an array element and near-field calibration antenna coordinate correction algorithm, a far and near-field channel phase comparison algorithm and a judgment strategy are utilized to carry out correction and verification comparison on an array element and near-field calibration antenna coordinate test result, and through far and near-field array element channel calibration comparison, spherical array antenna coordinate correction is completed.

Description

technical field [0001] The invention relates to a spherical phased array antenna element and a method for comparing and correcting the far and near field coordinates of the near field calibration antenna. Background technique [0002] With the development of phased array radar technology, different forms, different bands and various scales of phased array antennas have been continuously developed and applied, and correspondingly various calibration and measurement methods are also in continuous development. The phased array antenna is an antenna array composed of many array element channels, which mainly relies on the phase control of each array element to realize the rotation of the antenna beam pointing. Currently, there are three main testing methods for phased array antennas that are most widely used: far-field method, near-field method and compact field method. Each test method has its own advantages and disadvantages. For example, far-field measurement is suitable for...

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Problems solved by technology

This method is simple and reliable, consumes less hardware resources, and can solve the problem of poor beamforming quality caused by coordinate surveying and mapping accuracy errors in spherical phased array antenna beamforming.

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