Microwave demonstration of Purcell effect enhanced radiation efficiency

We experimentally demonstrate a Purcell effect-based design technique for improved impedance matching, and thus enhanced the reflection coefficient from a small microwave emitter. Using an iterative process centred on comparing the phase of the radiated field of the emitter in air with that of the e...

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Detalles Bibliográficos
Autores principales: Stanfield, L. D., Powell, A. W., Horsley, S. A. R., Sambles, J. R., Hibbins, A. P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10050203/
https://www.ncbi.nlm.nih.gov/pubmed/36977812
http://dx.doi.org/10.1038/s41598-023-32066-w
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author Stanfield, L. D.
Powell, A. W.
Horsley, S. A. R.
Sambles, J. R.
Hibbins, A. P.
author_facet Stanfield, L. D.
Powell, A. W.
Horsley, S. A. R.
Sambles, J. R.
Hibbins, A. P.
author_sort Stanfield, L. D.
collection PubMed
description We experimentally demonstrate a Purcell effect-based design technique for improved impedance matching, and thus enhanced the reflection coefficient from a small microwave emitter. Using an iterative process centred on comparing the phase of the radiated field of the emitter in air with that of the emitter in a dielectric environment, we optimise the structure of a dielectric hemisphere above a ground plane surrounding a small monopolar microwave emitter in order to maximise its radiation efficiency. The optimised system shows very strong coupling between the emitter and two omnidirectional radiation modes at 1.99 GHz and 2.84 GHz, yielding Purcell enhancement factors of 1762 and 411 times increase respectively, and near perfect radiation efficiency.
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spelling pubmed-100502032023-03-30 Microwave demonstration of Purcell effect enhanced radiation efficiency Stanfield, L. D. Powell, A. W. Horsley, S. A. R. Sambles, J. R. Hibbins, A. P. Sci Rep Article We experimentally demonstrate a Purcell effect-based design technique for improved impedance matching, and thus enhanced the reflection coefficient from a small microwave emitter. Using an iterative process centred on comparing the phase of the radiated field of the emitter in air with that of the emitter in a dielectric environment, we optimise the structure of a dielectric hemisphere above a ground plane surrounding a small monopolar microwave emitter in order to maximise its radiation efficiency. The optimised system shows very strong coupling between the emitter and two omnidirectional radiation modes at 1.99 GHz and 2.84 GHz, yielding Purcell enhancement factors of 1762 and 411 times increase respectively, and near perfect radiation efficiency. Nature Publishing Group UK 2023-03-28 /pmc/articles/PMC10050203/ /pubmed/36977812 http://dx.doi.org/10.1038/s41598-023-32066-w Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open AccessThis 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/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Stanfield, L. D.
Powell, A. W.
Horsley, S. A. R.
Sambles, J. R.
Hibbins, A. P.
Microwave demonstration of Purcell effect enhanced radiation efficiency
title Microwave demonstration of Purcell effect enhanced radiation efficiency
title_full Microwave demonstration of Purcell effect enhanced radiation efficiency
title_fullStr Microwave demonstration of Purcell effect enhanced radiation efficiency
title_full_unstemmed Microwave demonstration of Purcell effect enhanced radiation efficiency
title_short Microwave demonstration of Purcell effect enhanced radiation efficiency
title_sort microwave demonstration of purcell effect enhanced radiation efficiency
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10050203/
https://www.ncbi.nlm.nih.gov/pubmed/36977812
http://dx.doi.org/10.1038/s41598-023-32066-w
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