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Lightweight low-profile highly-efficient magnetless isolator comprising two time-modulated loops

Lightweight low-profile highly-efficient magnetless isolator comprising two time-modulated loops
Lightweight low-profile highly-efficient magnetless isolator comprising two time-modulated loops

We propose a lightweight compact highly efficient non-magnetic time-modulated isolator based on signal interference in phase-shifted time-modulated loops. The proposed isolator exhibits large isolation level and weak undesired time harmonics. In contrast to the recently proposed space-time-modulated isolators which are governed by progressive unidirectional coupling between the incident wave and the modulation, our isolator is not governed by such a progressive process and therefore possesses a very low-profile. An experimental demonstration of the proposed time-modulated isolator at microwave frequencies is provided, showing strong unidirectional wave transmission through the isolator with more than 27 dB contrast between the forward and backward waves.

isolator, magnetless, nonreciprocity, time modulation
0149-645X
416-419
IEEE
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. (2021) Lightweight low-profile highly-efficient magnetless isolator comprising two time-modulated loops. In 2021 IEEE MTT-S International Microwave Symposium, IMS 2021. vol. 2021-June, IEEE. pp. 416-419 . (doi:10.1109/IMS19712.2021.9574837).

Record type: Conference or Workshop Item (Paper)

Abstract

We propose a lightweight compact highly efficient non-magnetic time-modulated isolator based on signal interference in phase-shifted time-modulated loops. The proposed isolator exhibits large isolation level and weak undesired time harmonics. In contrast to the recently proposed space-time-modulated isolators which are governed by progressive unidirectional coupling between the incident wave and the modulation, our isolator is not governed by such a progressive process and therefore possesses a very low-profile. An experimental demonstration of the proposed time-modulated isolator at microwave frequencies is provided, showing strong unidirectional wave transmission through the isolator with more than 27 dB contrast between the forward and backward waves.

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More information

Published date: 7 June 2021
Additional Information: Funding Information: ACKNOWLEDGMENT This work is supported by the Natural Sciences and Engineering Research Council of Canada (NSERC). Publisher Copyright: © 2021 IEEE.
Venue - Dates: 2021 IEEE MTT-S International Microwave Symposium, IMS 2021, , Virtual, Atlanta, United States, 2021-06-07 - 2021-06-25
Keywords: isolator, magnetless, nonreciprocity, time modulation

Identifiers

Local EPrints ID: 482793
URI: http://eprints.soton.ac.uk/id/eprint/482793
ISSN: 0149-645X
PURE UUID: eb1cc7c4-46ce-4d0c-b9e2-a80bf154b904
ORCID for Sajjad Taravati: ORCID iD orcid.org/0000-0003-3992-0050

Catalogue record

Date deposited: 12 Oct 2023 16:45
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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