DOI: 10.1109/TMTT.2024.3459473   IEEEXplore: https://ieeexplore.ieee.org/document/10709381    

Transceiver system with TX/RX UDC flip-chips in 65 nm CMOS, 16TX and 64RX high-gain active antennas with AWMF 0156 beam formers, and a software-defined radio (SDR)

39 GHz band (38.5-40 GHz)

The flip-chip application has been optimized to minimize insertion loss in the 39 GHz band with fabricated transmission lines to the antenna port and specified older bump size. A low-IF architecture with a 4.75 GHz LO source, quadrupler and phase-locked loop module chosen for low phase noise performance deign assures sufficiently low RMS jitter for high data video signals. The TX antenna array include 2D parasitic elements that encompass the 4x4 array to stabilize antenna impedance.

Unmanned aerial vehicle (UAV) video streaming applications

2.2 km link; 37 dBm EIRP, 37 dB TX antenna gain, 40 dB RX antenna gain; 11.6 dBm saturated power with 13 dB conversion gain for the flip-chip TX, 18 dB conversion gain for the flip-chip RX; -17 dB at 0.7Gbps (QPSK), -20 dB at 1.4 Gbps (16 QAM) EVM at TX module; 15.1 MB/s peak data rate for a 56-MHz IF frequency bandwidth at 2.2 km; 8.84 W TX power consumption (8.54 W antenna), 18.04 W RX power consumption (17.6 W antenna).