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Air-bridged Schottky diodes for dynamically tunable millimeter-wave metamaterial phase shifters

A low loss metamaterial unit cell is presented with an integrated GaAs air-bridged Schottky diode to produce a dynamically tunable reflective phase shifter that is capable of up to 250° phase shift with an experimentally measured average loss of 6.2 dB at V-band. The air-bridged Schottky diode provi...

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Autores principales: Vassos, Evangelos, Churm, James, Powell, Jeff, Viegas, Colin, Alderman, Byron, Feresidis, Alexandros
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7971036/
https://www.ncbi.nlm.nih.gov/pubmed/33727657
http://dx.doi.org/10.1038/s41598-021-85565-z
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author Vassos, Evangelos
Churm, James
Powell, Jeff
Viegas, Colin
Alderman, Byron
Feresidis, Alexandros
author_facet Vassos, Evangelos
Churm, James
Powell, Jeff
Viegas, Colin
Alderman, Byron
Feresidis, Alexandros
author_sort Vassos, Evangelos
collection PubMed
description A low loss metamaterial unit cell is presented with an integrated GaAs air-bridged Schottky diode to produce a dynamically tunable reflective phase shifter that is capable of up to 250° phase shift with an experimentally measured average loss of 6.2 dB at V-band. The air-bridged Schottky diode provides a tuneable capacitance in the range between 30 and 50 fF under an applied reverse voltage bias. This can be used to alter the resonant frequency and phase response of a split patch unit cell of a periodic metasurface. The air-bridged diode die, which is flip-chip soldered to the patch, has ultra-low parasitic capacitance and resistance. Simulated and measured results are presented which verify the potential for the attainment of diode switching speeds with acceptable losses at mmWave frequencies. Furthermore the study shows that this diode-based unit cell can be integrated into metamaterial components, which have potential applications in future mmWave antenna beam-steering, intelligent reflecting surfaces for 6G communications, reflect-arrays, transmit-arrays or holographic antennas.
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spelling pubmed-79710362021-03-19 Air-bridged Schottky diodes for dynamically tunable millimeter-wave metamaterial phase shifters Vassos, Evangelos Churm, James Powell, Jeff Viegas, Colin Alderman, Byron Feresidis, Alexandros Sci Rep Article A low loss metamaterial unit cell is presented with an integrated GaAs air-bridged Schottky diode to produce a dynamically tunable reflective phase shifter that is capable of up to 250° phase shift with an experimentally measured average loss of 6.2 dB at V-band. The air-bridged Schottky diode provides a tuneable capacitance in the range between 30 and 50 fF under an applied reverse voltage bias. This can be used to alter the resonant frequency and phase response of a split patch unit cell of a periodic metasurface. The air-bridged diode die, which is flip-chip soldered to the patch, has ultra-low parasitic capacitance and resistance. Simulated and measured results are presented which verify the potential for the attainment of diode switching speeds with acceptable losses at mmWave frequencies. Furthermore the study shows that this diode-based unit cell can be integrated into metamaterial components, which have potential applications in future mmWave antenna beam-steering, intelligent reflecting surfaces for 6G communications, reflect-arrays, transmit-arrays or holographic antennas. Nature Publishing Group UK 2021-03-16 /pmc/articles/PMC7971036/ /pubmed/33727657 http://dx.doi.org/10.1038/s41598-021-85565-z Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Vassos, Evangelos
Churm, James
Powell, Jeff
Viegas, Colin
Alderman, Byron
Feresidis, Alexandros
Air-bridged Schottky diodes for dynamically tunable millimeter-wave metamaterial phase shifters
title Air-bridged Schottky diodes for dynamically tunable millimeter-wave metamaterial phase shifters
title_full Air-bridged Schottky diodes for dynamically tunable millimeter-wave metamaterial phase shifters
title_fullStr Air-bridged Schottky diodes for dynamically tunable millimeter-wave metamaterial phase shifters
title_full_unstemmed Air-bridged Schottky diodes for dynamically tunable millimeter-wave metamaterial phase shifters
title_short Air-bridged Schottky diodes for dynamically tunable millimeter-wave metamaterial phase shifters
title_sort air-bridged schottky diodes for dynamically tunable millimeter-wave metamaterial phase shifters
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7971036/
https://www.ncbi.nlm.nih.gov/pubmed/33727657
http://dx.doi.org/10.1038/s41598-021-85565-z
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