A 4T4R Compact Wide-Band Low Power UWB Beamfoming Transceiver for Efficiency and Sensitivity Improvement

This paper describes a 4T4R ultra-wideband transceiver (UWB TRX) with compact baseband shifter and digital phase interpolar (DPI) for beamforming to alleviate the contradiction between power consumption and performance. A complementary stacked multi-supply switched-capacitor power amplifier (SCPA) is introduced for efficiency. It allows PA work in both high output and low output mode, which makes the proposed transceiver could work as traditional short-ranging communication and ranging UWB TRX or as a 4 elements beamforming TRX for better system efficiency and sensitivity. A bounding wire based in-chip inductor less matching network is adopted for wide band and farther reducing the chip area. Implemented in 22nm CMOS technology, the proposed TRX works from 3GHz to 10GHz, achieve 3.7–4.2 dB NF and 57.1%@11.8dBm / 48%@-0.23dBm drain efficiency, occupies 8.72mW for RX and 31.9mW / 9.6mW for TX per channel.