- This event has passed.
Integrated Non-reciprocal Components Based on Linear Time-Varying Circuits
June 20, 2018 @ 6:30 pm - 7:45 pm
Lorentz reciprocity is a fundamental property of linear time-invariant passive circuits and systems constructed from conventional materials. However, non-reciprocal components, such as circulators, enable new wireless communication paradigms, such as full duplex wireless. Conventionally, non-reciprocal circulators have been realized using ferrite materials that exhibit the magneto-optic Faraday effect, and are consequently incompatible with CMOS, bulky, and expensive. Recent research has shown that reciprocity can be broken and non-reciprocal circulators can be built in CMOS using linear periodically time-varying (LPTV) circuits. This represents an interesting and unique property of LPTV circuits beyond the traditionally exploited tunable high-quality filtering in the so-called “N-path filters”. We will describe the fundamental physical principles, as well as four generations of CMOS circulators and circulator-based wireless systems that target emerging full-duplex and 5G millimeter-wave applications.
Speaker(s): Dr. Harish Krishnaswamy (S’03–M’09) ,
Agenda:
6:30 PM Networking
6:45 PM Lecture
Location:
3811 Fairfax Dr
6th floor
Arlington, Virginia
22203