Rethinking of the Antenna-circuit Boundary for Enabling Millimeter-wave Full-duplex Wireless Communication

This report addresses the research progress towards enabling millimeter-wave full-duplex wireless communication. Millimeter-wave technology has gained significant interest for short-range wireless personal area networks (WPANs), vehicular radar and next generation (5G) cellular communication in the recent years. Full-duplex is another emergent technology which can theoretically double the data capacity by simultaneous transmission and reception on the same frequency channel. This research paper reports recent developments at Columbia University on millimeter-wave full-duplex which merges these two emergent technologies. Specifically, this report will focus on a fully integrated magnetic-free passive circulator enabled by a novel concept of spatio-temporal conductivity modulation.