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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...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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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. |
format | Online Article Text |
id | pubmed-7971036 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
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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