Spherical near-field antenna measurement system and correction method

Abstract

The invention discloses a spherical near-field antenna measurement system and a correction method and belongs to the technical field of antenna measurement, the system comprises a main control module,a motion controller, a receiver, a pitching scanning frame, a probe array, an azimuth turntable, a multi-channel switch and a correction antenna, when the probe array is corrected, the correction antenna transmits a signal, the signal reaches the probe array through space propagation, the probe antenna in the probe array collects correction data one by one, and the collected correction data is Eat an initial position 0; the pitching scanning frame scans upwards to a position 1, and correction data is collected again as D; the pitching scanning frame scans downwards to a position 2, correction data F is acquired again, calculating is performed to obtain a group of correction coefficients through three groups of correction data, the coefficients are loaded to near-field measurement software, and the measurement data is automatically corrected in the testing process. The system and the method are high in correction precision, low in correction cost and high in correction speed, and a brand-new high-efficiency solution is provided for spherical near-field multi-probe correction.

Description

technical field [0001] The invention relates to the technical field of antenna measurement, in particular to a spherical near-field antenna measurement system and a correction method. Background technique [0002] The multi-probe spherical near-field antenna measurement system is an effective antenna measurement equipment, which is widely used in various antenna testing fields such as communication antennas, phased array radar antennas, and reflector satellite antennas. The multi-probe spherical near-field antenna measurement system can complete the measurement of the antenna gain, pointing angle, lobe width, side lobe level and other technical indicators of the antenna to be tested. [0003] During the use of this type of measurement system, it is necessary to periodically correct the amplitude and phase of the probe array to ensure that the amplitude loss and phase delay of each channel are the same. At this stage, the calibration of the probe array needs to be completed ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: how to solve the need to invest in special equipment during the calibration of the existing measurement system, the need to adjust the calibration parameters for different measurement systems, the need to spend a lot of time and labor costs, and it is difficult to meet the large-scale calibration of the measurement system Requirements and other issues, a spherical near-field antenna measurement system is provided

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