The Study of Wide-Dynamic IF Receiver in Pattern Measurement of Certain Phase Array Antenna by Near Field Focusing Method

摘要

In this paper, a Wide-Dynamic intermediate frequency (IF) Receiver is designed to test amplitude data in the measurement of certain phase array antenna by near field focusing method. There is wide dynamic rage between antenna side-lobe lever and main lobe lever. Right antenna pattern can't be gained because of AGC circuit and the narrow-dynamic range of the inherent IF receiver. In order to overcome distortion in the pattern measurement, it is needed to make a wide-dynamic IF receiver without AGC. In this paper, 70 dB wide-dynamic IF(30MHz) receiver is designed instead of the inherent IF receiver in certain radar. This receiver can be used in field area.