Fully Integrated, Time-Varying Non-Reciprocal Components for RF and mmWave Systems

Breaking through the fundamental constraints that govern all electromagnetic structures, like reciprocity and the delay-bandwidth-size limit, has the potential to revolutionize all electromagnetic circuit and system applications. For example, challenging reciprocity enables the creation of non-reciprocal components such as isolators and circulators, which are essential in full-duplex wireless radios, radar, biomedical imaging, and quantum computing systems. Surpassing the delay-bandwidth-size limit allows for ultra-broadband yet highly compact devices whose size is no longer tied to the wavelength of the operating frequency. This talk will focus on leveraging time-variance as a novel tool to transcend these foundational limits and rethink circuit design. Specifically, it will discuss non-magnetic time-varying circuits and systems that enable fully integrated non-reciprocal components, operating across RF to millimeter-wave frequencies, with extremely compact form factors, multi-watt power handling, and adjustable isolation. These prototypes meet the rigorous performance standards needed for practical wireless applications, advancing the field of integrated non-reciprocity toward real-world implementations.