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Asynchronous electric field visualization using an integrated multichannel electro-optic probe

The higher the frequency, the more complex the scattering, diffraction, multiple reflection, and interference that occur in practical applications such as radar-installed vehicles and transmitter-installed mobile modules, etc. Near-field measurement in “real situations” is important for not only inv...

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Autores principales: Hisatake, Shintaro, Kamada, Junpei, Asano, Yuya, Uchida, Hirohisa, Tojo, Makoto, Oikawa, Yoichi, Miyaji, Kunio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7536238/
https://www.ncbi.nlm.nih.gov/pubmed/33020572
http://dx.doi.org/10.1038/s41598-020-73538-7
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author Hisatake, Shintaro
Kamada, Junpei
Asano, Yuya
Uchida, Hirohisa
Tojo, Makoto
Oikawa, Yoichi
Miyaji, Kunio
author_facet Hisatake, Shintaro
Kamada, Junpei
Asano, Yuya
Uchida, Hirohisa
Tojo, Makoto
Oikawa, Yoichi
Miyaji, Kunio
author_sort Hisatake, Shintaro
collection PubMed
description The higher the frequency, the more complex the scattering, diffraction, multiple reflection, and interference that occur in practical applications such as radar-installed vehicles and transmitter-installed mobile modules, etc. Near-field measurement in “real situations” is important for not only investigating the origin of unpredictable field distortions but also maximizing the system performance by optimal placement of antennas, modules, etc. Here, as an alternative to the previous vector-network-analyzer-based measurement, we propose a new asynchronous approach that visualizes the amplitude and phase distributions of electric near-fields three-dimensionally without placing a reference probe at a fixed point or plugging a cable to the RF source to be measured. We demonstrate the visualization of a frequency-modulated continuous wave (FMCW) signal (24 GHz ± 40 MHz, modulation cycle: 2.5 ms), and show that the measured radiation patterns of a standard horn antenna agree well with the simulation results. We also demonstrate a proof-of-concept experiment that imitates a realistic situation of a bumper installed vehicle to show how the bumper alters the radiation patterns of the FMCW radar signal. The technique is based on photonics and enables measuring in the microwave to millimeter-wave range.
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spelling pubmed-75362382020-10-07 Asynchronous electric field visualization using an integrated multichannel electro-optic probe Hisatake, Shintaro Kamada, Junpei Asano, Yuya Uchida, Hirohisa Tojo, Makoto Oikawa, Yoichi Miyaji, Kunio Sci Rep Article The higher the frequency, the more complex the scattering, diffraction, multiple reflection, and interference that occur in practical applications such as radar-installed vehicles and transmitter-installed mobile modules, etc. Near-field measurement in “real situations” is important for not only investigating the origin of unpredictable field distortions but also maximizing the system performance by optimal placement of antennas, modules, etc. Here, as an alternative to the previous vector-network-analyzer-based measurement, we propose a new asynchronous approach that visualizes the amplitude and phase distributions of electric near-fields three-dimensionally without placing a reference probe at a fixed point or plugging a cable to the RF source to be measured. We demonstrate the visualization of a frequency-modulated continuous wave (FMCW) signal (24 GHz ± 40 MHz, modulation cycle: 2.5 ms), and show that the measured radiation patterns of a standard horn antenna agree well with the simulation results. We also demonstrate a proof-of-concept experiment that imitates a realistic situation of a bumper installed vehicle to show how the bumper alters the radiation patterns of the FMCW radar signal. The technique is based on photonics and enables measuring in the microwave to millimeter-wave range. Nature Publishing Group UK 2020-10-05 /pmc/articles/PMC7536238/ /pubmed/33020572 http://dx.doi.org/10.1038/s41598-020-73538-7 Text en © The Author(s) 2020 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
Hisatake, Shintaro
Kamada, Junpei
Asano, Yuya
Uchida, Hirohisa
Tojo, Makoto
Oikawa, Yoichi
Miyaji, Kunio
Asynchronous electric field visualization using an integrated multichannel electro-optic probe
title Asynchronous electric field visualization using an integrated multichannel electro-optic probe
title_full Asynchronous electric field visualization using an integrated multichannel electro-optic probe
title_fullStr Asynchronous electric field visualization using an integrated multichannel electro-optic probe
title_full_unstemmed Asynchronous electric field visualization using an integrated multichannel electro-optic probe
title_short Asynchronous electric field visualization using an integrated multichannel electro-optic probe
title_sort asynchronous electric field visualization using an integrated multichannel electro-optic probe
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7536238/
https://www.ncbi.nlm.nih.gov/pubmed/33020572
http://dx.doi.org/10.1038/s41598-020-73538-7
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