Array antenna channel calibration system for plane wave simulator

Abstract

The invention discloses an array antenna channel calibration system for a plane wave simulator, which comprises a plane wave simulator array antenna comprising multiple sub units, a regulating networkfor controlling the amplitude and the phase of each sub unit, a calibration probe antenna or probe array with a fixed and known position, a vector network analyzer, a connector cable and other accessories. The calibration system adopts a vector superposition principle, through control on the phase of the tested array antenna channel, in a far field area of the antenna from the two-dimensional array antenna aperture unit channel, a transmission coefficient (S21) value when the phase of the tested array antenna channel changes is acquired, and thus, the channel amplitude and phase difference isanalyzed. The channel calibration system has a wide application range and can be used for consistency calibration on the unit channels of the array antenna, especially for the unit channel calibration of the planar wave generator array antenna.

Description

technical field [0001] The present invention relates to the field of electromagnetic field and microwave technology, the field of array antenna technology, the field of antenna and system measurement technology, in particular to the field of channel consistency near-field calibration of planar array antenna, especially the channel calibration system of plane wave simulator array antenna. The specific content is Calibrate the amplitude and phase consistency of each channel in the near-field area of ​​the planar antenna array by means of single probe or probe array measurement. Background technique [0002] With the research of 5G mobile communication technology and the production of related prototypes, the design, production and measurement technology of array antennas began to enter the field of mobile communication and received special attention. Large-scale active antenna array technology is one of the key technologies of 5G mobile communication technology. For the measure...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: to overcome the shortcomings of the existing array antenna calibration method, such as time-consuming, inapplicable to limited space, and complicated calibration system construction, etc., to provide an array antenna with near-field distance, automatic, and rapid calibration. technology, which has the characteristics of low equipment cost and difficulty, simple system setup, time saving, etc., and it is only necessary to replace the probe for different frequency bands

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