RF

Emerging mm-wave systems, such as the 5G new radio, will be implemented as phased arrays (multiple transmitters and receivers channels connected to an array of antennas) integrated in CMOS chips. RF CMOS circuit excels in the integration of complex circuits but suffer from a degradation in performance due to mismatches between devices originating in the fabrication process. As matching between the channels is critical for the array performance, calibration circuits...

Reconfigurable RF integrated circuits are an attractive feature for sustaining the increasing number of standards and functionalities of modern mobile devices. While back-end circuits in a radio transceiver (e.g., baseband analog, IF and digital) can be reconfigured using MOSFET switches, front-end circuits require high performance switches since resonant narrowband circuits require high quality factor inductors and capacitors. Phase-change-materials (PCM)-based RF switches have been proposed as high-performance RF switches due to...