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A high Q piezoelectric resonator as a portable VLF transmitter

Very low frequency communication systems (3 kHz–30 kHz) enable applications not feasible at higher frequencies. However, the highest radiation efficiency antennas require size at the scale of the wavelength (here, >1 km), making portable transmitters extremely challenging. Facilitating transmitte...

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Autores principales: Kemp, Mark A., Franzi, Matt, Haase, Andy, Jongewaard, Erik, Whittaker, Matthew T., Kirkpatrick, Michael, Sparr, Robert
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6461683/
https://www.ncbi.nlm.nih.gov/pubmed/30979897
http://dx.doi.org/10.1038/s41467-019-09680-2
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author Kemp, Mark A.
Franzi, Matt
Haase, Andy
Jongewaard, Erik
Whittaker, Matthew T.
Kirkpatrick, Michael
Sparr, Robert
author_facet Kemp, Mark A.
Franzi, Matt
Haase, Andy
Jongewaard, Erik
Whittaker, Matthew T.
Kirkpatrick, Michael
Sparr, Robert
author_sort Kemp, Mark A.
collection PubMed
description Very low frequency communication systems (3 kHz–30 kHz) enable applications not feasible at higher frequencies. However, the highest radiation efficiency antennas require size at the scale of the wavelength (here, >1 km), making portable transmitters extremely challenging. Facilitating transmitters at the 10 cm scale, we demonstrate an ultra-low loss lithium niobate piezoelectric electric dipole driven at acoustic resonance that radiates with greater than 300x higher efficiency compared to the previous state of the art at a comparable electrical size. A piezoelectric radiating element eliminates the need for large impedance matching networks as it self-resonates at the acoustic wavelength. Temporal modulation of this resonance demonstrates a device bandwidth greater than 83x beyond the conventional Bode-Fano limit, thus increasing the transmitter bitrate while still minimizing losses. These results will open new applications for portable, electrically small antennas.
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spelling pubmed-64616832019-04-15 A high Q piezoelectric resonator as a portable VLF transmitter Kemp, Mark A. Franzi, Matt Haase, Andy Jongewaard, Erik Whittaker, Matthew T. Kirkpatrick, Michael Sparr, Robert Nat Commun Article Very low frequency communication systems (3 kHz–30 kHz) enable applications not feasible at higher frequencies. However, the highest radiation efficiency antennas require size at the scale of the wavelength (here, >1 km), making portable transmitters extremely challenging. Facilitating transmitters at the 10 cm scale, we demonstrate an ultra-low loss lithium niobate piezoelectric electric dipole driven at acoustic resonance that radiates with greater than 300x higher efficiency compared to the previous state of the art at a comparable electrical size. A piezoelectric radiating element eliminates the need for large impedance matching networks as it self-resonates at the acoustic wavelength. Temporal modulation of this resonance demonstrates a device bandwidth greater than 83x beyond the conventional Bode-Fano limit, thus increasing the transmitter bitrate while still minimizing losses. These results will open new applications for portable, electrically small antennas. Nature Publishing Group UK 2019-04-12 /pmc/articles/PMC6461683/ /pubmed/30979897 http://dx.doi.org/10.1038/s41467-019-09680-2 Text en © This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2019 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Kemp, Mark A.
Franzi, Matt
Haase, Andy
Jongewaard, Erik
Whittaker, Matthew T.
Kirkpatrick, Michael
Sparr, Robert
A high Q piezoelectric resonator as a portable VLF transmitter
title A high Q piezoelectric resonator as a portable VLF transmitter
title_full A high Q piezoelectric resonator as a portable VLF transmitter
title_fullStr A high Q piezoelectric resonator as a portable VLF transmitter
title_full_unstemmed A high Q piezoelectric resonator as a portable VLF transmitter
title_short A high Q piezoelectric resonator as a portable VLF transmitter
title_sort high q piezoelectric resonator as a portable vlf transmitter
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6461683/
https://www.ncbi.nlm.nih.gov/pubmed/30979897
http://dx.doi.org/10.1038/s41467-019-09680-2
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