title: Ultra-Wide Band Non-reciprocity through Sequentially-Switched Delay Lines.
abstract: Achieving non-reciprocity through unconventional methods without the use of magnetic material has recently become a subject of great interest. Towards this goal a time switching strategy known as the Sequentially-Switched Delay Line (SSDL) is proposed. The essential SSDL configuration consists of six transmission lines of equal length, along with five switches. Each switch is turned on and off sequentially to distribute and route the propagating electromagnetic wave, allowing for simultaneous transmission and receiving of signals through the device. Preliminary experimental results with commercial off the shelf parts are presented which demonstrated non-reciprocal behavior with greater than 40 dB isolation from 200 KHz to 200 MHz. The theory and experimental results demonstrated that the SSDL concept may lead to future on-chip circulators over multi-octaves of frequency.
authors.affiliation: Department of Electrical Engineering, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095, USA.
authors.forename: Mathew M
authors.initials: MM
authors.lastname: Biedka
authors.affiliation: Department of Electrical Engineering, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095, USA.
authors.forename: Rui
authors.initials: R
authors.lastname: Zhu
authors.affiliation: Department of Electrical Engineering, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095, USA.
authors.forename: Qiang Mark
authors.initials: QM
authors.lastname: Xu
authors.affiliation: Department of Electrical Engineering, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095, USA.
authors.forename: Yuanxun Ethan
authors.initials: YE
authors.lastname: Wang