A C-Band Compact High-Linearity Multibeam Phased-Array Receiver with Merged Gain-Programmable Phase Shifter Technique

This paper presents a C-band four-element eight-beam phased-array receiver. By utilizing the proposed merged gain-programmable phase shifter (GPS) technique, the chip achieves a 360° phase-shifting range with <2.4° rms phase error and a 20.5-dB gain range with <0.18 dB rms amplitude error at 4.5–7 GHz. The chip demonstrates a 23.5-dB gain and a 6.5-dB noise figure (NF) at 5 GHz. By utilizing the multigated transistor (MGTR) technique, the receiver realizes a -10.8-dBm input 1-dB gain compression point (IP1dB) and a -4.7-dBm input third-order intercept point (IIP₃) at 5.5 GHz. The proposed receiver occupies 6.4 × 3.1 mm² area and consumes 1265 mW, which achieves a state-of-the-art number of concurrent reconfigurable beams and an excellent linearity among silicon-based beamformers.