DOI: 10.1109/TMTT.2026.3685639   IEEEXplore: https://ieeexplore.ieee.org/document/11498438

A 2-element multi-band phased-array transceiver in 65 nm CMOS.

18 – 30 GHz and 30 – 50 GHz (5G FR2 bands n257, n258, n259, n260, n261, n262 and FR2 NTN bands n510, n511, n512)

A frequency-reconfigurable power amplifier (PA) utilizing an asymmetric coupled multimode transformer and a triple-coupled frequency-reconfigurable network (TC-FRN), enables band-shifting, bandwidth expansion, and spectrum reconstruction. A tunable image-rejection filter (TIRF) in the TX path enhances image-rejection and energy efficiency. A dual-path multiband low-noise amplifier (LNA) in the receive path minimizes noise figure (NF) and power consumption while extending bandwidth. A local oscillator (LO) phase-shifting architecture incorporating a distributed LO chain and an ultrawideband bidirectional mixer reduces complexity and power consumption.

Multiscenario and world roaming 5G wireless transceivers with higher data rates and ultralow transmission latency.

Better than−30 dBc adjacent channel leakage ratio (ACLR) and better than -25 dB error vector magnitude (EVM) with 400-MHz 64-QAM modulation. 16.7 dBm peak OP1dB with 27.3 dB S21 at 28 GHz in TX mode; 7.1 dB minimum NF with 35 dB S21 and−35.3 dBm IP1dB at 22 GHz in RX mode. 28.2 20 64.7 dBc image-rejection ratio (IMRR) of 28.2 to 64.7 dBc TX-to-RX.