Design and implementation of a low additional phase shift wideband multi-channel R module
Phased array radar receivers often use digital attenuators to control the receiving gain in order to expand the dynamic range of the receiver.In different attenuation situations,it is necessary to ensure phase consistency between each channel,which requires a digital attenuator with a lower additional phase shift.This paper designed and manufactrued a low additional R module that operates at 6-18 GHz.The noise figure of R module is less than 3.8 dB,and gain of each channel is 36±2 dB.Each channel containing a 6-bit digital attenuator,with additional phase shift is less than±5°.
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