Space-Time Medium Functions as a Perfect Antenna-Mixer-Amplifier Transceiver
Space-Time Medium Functions as a Perfect Antenna-Mixer-Amplifier Transceiver
We show that a space-time-varying medium can function as a front-end transceiver, i.e., an antenna-mixer-amplifier. Such a functionality is endowed by space-time surface waves associated with complex space-time wave vectors in a subluminal space-time medium. The proposed structure introduces pure frequency up and down conversions, with very weak undesired time harmonics. In contrast to other recently proposed space-time mixers, a large frequency up- to down-conversion ratio, associated with gain, is achievable. Furthermore, as the structure does not operate based on progressive energy transition between the space-time modulation and the incident wave, it possesses a subwavelength thickness (metasurface). Such a multifunctional, highly efficient, and compact medium is expected to find various applications in modern wireless telecommunication systems.
Taravati, Sajjad
0026f25d-c919-4273-b956-8fe9795b31ce
Eleftheriades, George V.
280bbae6-32df-4af5-bcad-110f38ad72e7
9 November 2020
Taravati, Sajjad
0026f25d-c919-4273-b956-8fe9795b31ce
Eleftheriades, George V.
280bbae6-32df-4af5-bcad-110f38ad72e7
Taravati, Sajjad and Eleftheriades, George V.
(2020)
Space-Time Medium Functions as a Perfect Antenna-Mixer-Amplifier Transceiver.
Physical Review Applied, 14 (5), [054017].
(doi:10.1103/PhysRevApplied.14.054017).
Abstract
We show that a space-time-varying medium can function as a front-end transceiver, i.e., an antenna-mixer-amplifier. Such a functionality is endowed by space-time surface waves associated with complex space-time wave vectors in a subluminal space-time medium. The proposed structure introduces pure frequency up and down conversions, with very weak undesired time harmonics. In contrast to other recently proposed space-time mixers, a large frequency up- to down-conversion ratio, associated with gain, is achievable. Furthermore, as the structure does not operate based on progressive energy transition between the space-time modulation and the incident wave, it possesses a subwavelength thickness (metasurface). Such a multifunctional, highly efficient, and compact medium is expected to find various applications in modern wireless telecommunication systems.
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Published date: 9 November 2020
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© 2020 American Physical Society.
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Local EPrints ID: 482703
URI: http://eprints.soton.ac.uk/id/eprint/482703
ISSN: 2331-7019
PURE UUID: 3ec87f31-f8c6-4ad7-ba00-612b19966f29
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Date deposited: 11 Oct 2023 16:53
Last modified: 17 Mar 2024 05:03
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Author:
Sajjad Taravati
Author:
George V. Eleftheriades
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