Abstract: The compact field is the key device for antenna and target RCS testing.It can calibrate the spherical wave from the feed to a quasi-planar wave at close range.In order to evaluate whether the electromagnetic wave distribution generated in the quite zone of the compact field conforms to the quasi-planar wave characteristics,it is necessary to build a high-performance microwave amplitude-phase transmitting and receiving system and a large-scale multi-degree-of-freedom high-precision scanning system on site.In this paper,the performance calibration requirements of a large double reflector compact field are taken as an example.From the aspects of on-site measurement of amplitude and phase system construction,large-scale complex scanning system design,and on-site measurement implementation,the related technologies of field calibration of compact field quite zone performance are analyzed in detail.The measured results show that the calibration system built on site meets the performance requirements of the long-distance large double-reflection surfacecompact field quiet zone,and the values of each test parameter meet the design requirements of the compact field.

Key words: ⁺Compact field, ⁺Amplitude, Phase, Calibration technology