2018 Volume 15 Issue 22 Pages 20180888
A Ku-band receiver chain for phased array system is presented in this paper. It is composed of three LNAs, a 4-bit attenuator and a 5-bit phase shifter. This design is fabricated in 180-nm standard CMOS with a chip area of 3 mm × 0.8 mm. The measured peak gain is 21 dB at 16.5 GHz and the minimum NF is 6.7 dB at 16 GHz. The 5-bit phase shifter realizes a shift range of 0–360°. The tested minimum RMS phase error and gain error of the system are 2.1° and 0.46 dB. The 4-bit attenuator provides a gain tuning range of 15 dB with 1-dB step. The minimum RMS phase shift error and amplitude error are 2.7° and 0.24 dB.