Millimeter-Wave Low Noise Amplifiers in SOI for 5G/6G Joint Communication and Sensing

Parlak, Mehmet [UCL] Rack, Martin [UCL] Lucas Nyssens Denis, Théo [UCL] Raskin, Jean-Pierre [UCL] Lederer, Dimitri [UCL]

Joint Communication and Sensing (JCAS) has garnered considerable interest, offering dynamic resource allocation and operational adjustments based on real-time inputs, optimizing energy efficiency and overall system performance. JCAS comes with its challenges. Despite sharing a common front-end in a JCAS transceiver, communication and radio sensing exhibit distinct specifications, primarily in bandwidth and linearity. For the RF front-end to effectively function in both radar and communication modes, it is essential to incorporate reconfigurability concerning parameters such as gain, linearity, frequency, and bandwidth. Illustrating the operation of two LNAs in the 5G and 6G bands, this paper investigates the fully depleted (FD) silicon-on-insulator (SOI) technology as a candidate for JCAS systems integration while highlighting the utilization of the back-gate bias feature to enhance reconfigurability in communication and radar systems.