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Low-noise and linear nonmagnetic circulator by a temporal nonreciprocal phase shifter

Low-noise and linear nonmagnetic circulator by a temporal nonreciprocal phase shifter
Low-noise and linear nonmagnetic circulator by a temporal nonreciprocal phase shifter
Conventional circulators are made of magnetic ferrites and suffer from a cumbersome architecture, incompatibility with integrated circuit technology, and inability for high-frequency applications. To overcome these limitations, here we propose a low-noise, lightweight, low-profile, and linear nonmagnetic circulator comprising a nonreciprocal time-varying phase shifter. This circulator is composing a nonreciprocal temporal phase shifter and two reciprocal delay-line-based phase shifters. The proposed nonreciprocal temporal phase shifter is based on the generation of time-harmonic signals, enforcing destructive interference for undesired time harmonics and constructive interference for desired time harmonics at different locations of the structure. Such a unique task is accomplished through two phase-engineered temporal loops. The phase and frequency of these two loops are governed by external signals with different phases, imparting an effective electronic angular momentum to the system. We observe a large isolation level of greater than 32.3 dB, a low noise figure of less than 2.5 dB, a P1dB of +30.2 dBm, and IIP3 of +43.5 dBm. Furthermore, this circulator is endowed with a reconfigurable architecture and can be directly embedded in a conventional integrated circuit (IC) technology to realize a class of high-power handling and linear IC circulators.
2331-7019
Taravati, Sajjad
0026f25d-c919-4273-b956-8fe9795b31ce
Eleftheriades, George V.
280bbae6-32df-4af5-bcad-110f38ad72e7
Taravati, Sajjad
0026f25d-c919-4273-b956-8fe9795b31ce
Eleftheriades, George V.
280bbae6-32df-4af5-bcad-110f38ad72e7

Taravati, Sajjad and Eleftheriades, George V. (2022) Low-noise and linear nonmagnetic circulator by a temporal nonreciprocal phase shifter. Physical Review Applied, 18 (3), [034082]. (doi:10.1103/PhysRevApplied.18.034082).

Record type: Article

Abstract

Conventional circulators are made of magnetic ferrites and suffer from a cumbersome architecture, incompatibility with integrated circuit technology, and inability for high-frequency applications. To overcome these limitations, here we propose a low-noise, lightweight, low-profile, and linear nonmagnetic circulator comprising a nonreciprocal time-varying phase shifter. This circulator is composing a nonreciprocal temporal phase shifter and two reciprocal delay-line-based phase shifters. The proposed nonreciprocal temporal phase shifter is based on the generation of time-harmonic signals, enforcing destructive interference for undesired time harmonics and constructive interference for desired time harmonics at different locations of the structure. Such a unique task is accomplished through two phase-engineered temporal loops. The phase and frequency of these two loops are governed by external signals with different phases, imparting an effective electronic angular momentum to the system. We observe a large isolation level of greater than 32.3 dB, a low noise figure of less than 2.5 dB, a P1dB of +30.2 dBm, and IIP3 of +43.5 dBm. Furthermore, this circulator is endowed with a reconfigurable architecture and can be directly embedded in a conventional integrated circuit (IC) technology to realize a class of high-power handling and linear IC circulators.

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More information

Accepted/In Press date: 22 August 2022
Published date: 29 September 2022

Identifiers

Local EPrints ID: 483455
URI: http://eprints.soton.ac.uk/id/eprint/483455
ISSN: 2331-7019
PURE UUID: bbeffbcf-486b-4f4d-b9bc-971fb0811af4
ORCID for Sajjad Taravati: ORCID iD orcid.org/0000-0003-3992-0050

Catalogue record

Date deposited: 31 Oct 2023 17:38
Last modified: 02 May 2024 02:05

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Contributors

Author: Sajjad Taravati ORCID iD
Author: George V. Eleftheriades

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