Electronic Quadrature Hybrid Duplexer for Wireless Simultaneous Transmit Receive Operation

Dror Regev, Erez Zolkov, Nimrod Ginzberg, Shimi Shilo, Doron Ezri, Emanuel Cohen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This article presents a new four-port electronic device - the directional quadrature hybrid isolator (DQHI). The topology of this duplexer is similar to the four-arm quadrature hybrid (QH) except for a 90° non-reciprocal phase shifter (NRPS) replacing one of the λ/4 Z0 arms. We derive the DQHI S-parameters and show that it performs a 0°/90° power division for an incident signal at port 2 into ports 3 and 4 exactly like a QH, functions as an ideal isolator between ports 1 and 2, enables high-isolation between port 1 to ports 3 and 4 and facilitates injection of self-interference cancellation (SIC) signal from port 4 into 3. Analytic evaluation of a dual-port N-path circuit as an NRPS is performed and the theoretical impact on the DQHI performance is examined. An 8-path, 65-nm NMOS design is utilized to simulate the performance with a 1 GHz clock resulting in 1.7 dB TX-to-antenna loss, antenna-RX loss of 3 dB, SIC-to-RX loss of 6.6 dB, TX-RX and TX-SIC isolations of 26 and 12.5 dB respectively.

Original languageEnglish
Title of host publicationProceedings of the 2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems, WMCS 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665486095
DOIs
StatePublished - 2022
Event2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems, WMCS 2022 - Waco, United States
Duration: 19 Apr 202220 Apr 2022

Publication series

NameProceedings of the 2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems, WMCS 2022

Conference

Conference2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems, WMCS 2022
Country/TerritoryUnited States
CityWaco
Period19/04/2220/04/22

Keywords

  • Electronic-Circulator (EC)
  • Full-Duplex (FD)
  • Impedance Transparency
  • Non-Reciprocal Phase Shifter (NRPS)
  • Quadrature Hybrid (QH)
  • Quadrature-Quasi Circulating Hybrid (QCQH)

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering
  • Computer Networks and Communications

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