Signal amplification in time-modulated RF components with infinite superluminality

Author's Department

Electronics & Communications Engineering Department

Third Author's Department

Electronics & Communications Engineering Department

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https://doi.org/10.23919/INC-USNC-URSI61303.2024.10632268

All Authors

Mohamed F. Hagag, Thomas R. Jones, Karim Seddik, Dimitrios Peroulis

Document Type

Research Article

Publication Title

2024 IEEE INC-USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), INC-USNC-URSI 2024 - Proceedings

Publication Date

1-1-2024

doi

10.23919/INC-USNC-URSI61303.2024.10632268

Abstract

Wave propagation in time-varying media is a hot topic at the moment due to the exotic properties the wave experiences, such as magnetless non-reciprocity, parity-time symmetry, and topological aspects. When the speed of modulation exceeds the speed of light in a media (superluminal regime), momentum gaps appear in the real frequency dispersion diagram. Only complex frequencies exist within these gaps with positive values (causing wave growth) and negative values (causing wave decay) imaginary parts. If the media is pure-time modulated (infinite superluminality), signal amplification happens at 0.5 wave/modulation frequency ratio (Fs/Fm). Here, we present signal amplification modeling of time-modulation RF components, transmission line (TL) and cavity resonators. The transmission matrix method is utilized to get the dispersion relations which confirmed by circuit modeling transient simulations.

First Page

367

Comments

Conference Paper. Record derived from SCOPUS.

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