Dosimetry and Verification for 6-GHz Whole-Body Non-Constraint Exposure of Rats Using Reverberation Chamber
Summary :
With the rapid increase of various uses of wireless communications in modern life, the high microwave and millimeter wave frequency bands are attracting much attention. However, the existing databases on above 6GHz radio-frequency (RF) electromagnetic (EM) field exposure of biological bodies are obviously insufficient. An in-vivo research project on local and whole-body exposure of rats to RF-EM fields above 6GHz was started in Japan in 2013. This study aims to perform a dosimetric design for the whole-body-average specific absorption rates (WBA-SARs) of unconstrained rats exposed to 6GHz RF-EM fields in a reverberation chamber (RC). The required input power into the RC is clarified using a two-step evaluation method in order to achieve a target exposure level in rats. The two-step method, which incorporates the finite-difference time-domain (FDTD) numerical solutions with electric field measurements in an RC exposure system, is used as an evaluation method to determine the whole-body exposure level in the rats. In order to verify the validity of the two-step method, we use S-parameter measurements inside the RC to experimentally derive the WBA-SARs with rat-equivalent phantoms and then compare those with the FDTD-calculated ones. It was shown that the difference between the two-step method and the S-parameter measurements is within 1.63dB, which reveals the validity and usefulness of the two-step technique.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E98-B No.7 pp.1164-1172
- Publication Date
- 2015/07/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.E98.B.1164
- Type of Manuscript
- Special Section PAPER (Special Section on Electromagnetic Compatibility Technology in Conjunction with Main Topics of EMC'14/Tokyo)
- Category
Authors
Jingjing SHI
Nagoya Institute of Technology
Jerdvisanop CHAKAROTHAI
National Institute of Information and Communication Technology
Jianqing WANG
Nagoya Institute of Technology
Kanako WAKE
National Institute of Information and Communication Technology
Soichi WATANABE
National Institute of Information and Communication Technology
Osamu FUJIWARA
Nagoya Institute of Technology
Keyword
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Jingjing SHI, Jerdvisanop CHAKAROTHAI, Jianqing WANG, Kanako WAKE, Soichi WATANABE, Osamu FUJIWARA, "Dosimetry and Verification for 6-GHz Whole-Body Non-Constraint Exposure of Rats Using Reverberation Chamber" in IEICE TRANSACTIONS on Communications,
vol. E98-B, no. 7, pp. 1164-1172, July 2015, doi: 10.1587/transcom.E98.B.1164.
Abstract: With the rapid increase of various uses of wireless communications in modern life, the high microwave and millimeter wave frequency bands are attracting much attention. However, the existing databases on above 6GHz radio-frequency (RF) electromagnetic (EM) field exposure of biological bodies are obviously insufficient. An in-vivo research project on local and whole-body exposure of rats to RF-EM fields above 6GHz was started in Japan in 2013. This study aims to perform a dosimetric design for the whole-body-average specific absorption rates (WBA-SARs) of unconstrained rats exposed to 6GHz RF-EM fields in a reverberation chamber (RC). The required input power into the RC is clarified using a two-step evaluation method in order to achieve a target exposure level in rats. The two-step method, which incorporates the finite-difference time-domain (FDTD) numerical solutions with electric field measurements in an RC exposure system, is used as an evaluation method to determine the whole-body exposure level in the rats. In order to verify the validity of the two-step method, we use S-parameter measurements inside the RC to experimentally derive the WBA-SARs with rat-equivalent phantoms and then compare those with the FDTD-calculated ones. It was shown that the difference between the two-step method and the S-parameter measurements is within 1.63dB, which reveals the validity and usefulness of the two-step technique.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E98.B.1164/_p
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@ARTICLE{e98-b_7_1164,
author={Jingjing SHI, Jerdvisanop CHAKAROTHAI, Jianqing WANG, Kanako WAKE, Soichi WATANABE, Osamu FUJIWARA, },
journal={IEICE TRANSACTIONS on Communications},
title={Dosimetry and Verification for 6-GHz Whole-Body Non-Constraint Exposure of Rats Using Reverberation Chamber},
year={2015},
volume={E98-B},
number={7},
pages={1164-1172},
abstract={With the rapid increase of various uses of wireless communications in modern life, the high microwave and millimeter wave frequency bands are attracting much attention. However, the existing databases on above 6GHz radio-frequency (RF) electromagnetic (EM) field exposure of biological bodies are obviously insufficient. An in-vivo research project on local and whole-body exposure of rats to RF-EM fields above 6GHz was started in Japan in 2013. This study aims to perform a dosimetric design for the whole-body-average specific absorption rates (WBA-SARs) of unconstrained rats exposed to 6GHz RF-EM fields in a reverberation chamber (RC). The required input power into the RC is clarified using a two-step evaluation method in order to achieve a target exposure level in rats. The two-step method, which incorporates the finite-difference time-domain (FDTD) numerical solutions with electric field measurements in an RC exposure system, is used as an evaluation method to determine the whole-body exposure level in the rats. In order to verify the validity of the two-step method, we use S-parameter measurements inside the RC to experimentally derive the WBA-SARs with rat-equivalent phantoms and then compare those with the FDTD-calculated ones. It was shown that the difference between the two-step method and the S-parameter measurements is within 1.63dB, which reveals the validity and usefulness of the two-step technique.},
keywords={},
doi={10.1587/transcom.E98.B.1164},
ISSN={1745-1345},
month={July},}
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TY - JOUR
TI - Dosimetry and Verification for 6-GHz Whole-Body Non-Constraint Exposure of Rats Using Reverberation Chamber
T2 - IEICE TRANSACTIONS on Communications
SP - 1164
EP - 1172
AU - Jingjing SHI
AU - Jerdvisanop CHAKAROTHAI
AU - Jianqing WANG
AU - Kanako WAKE
AU - Soichi WATANABE
AU - Osamu FUJIWARA
PY - 2015
DO - 10.1587/transcom.E98.B.1164
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E98-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2015
AB - With the rapid increase of various uses of wireless communications in modern life, the high microwave and millimeter wave frequency bands are attracting much attention. However, the existing databases on above 6GHz radio-frequency (RF) electromagnetic (EM) field exposure of biological bodies are obviously insufficient. An in-vivo research project on local and whole-body exposure of rats to RF-EM fields above 6GHz was started in Japan in 2013. This study aims to perform a dosimetric design for the whole-body-average specific absorption rates (WBA-SARs) of unconstrained rats exposed to 6GHz RF-EM fields in a reverberation chamber (RC). The required input power into the RC is clarified using a two-step evaluation method in order to achieve a target exposure level in rats. The two-step method, which incorporates the finite-difference time-domain (FDTD) numerical solutions with electric field measurements in an RC exposure system, is used as an evaluation method to determine the whole-body exposure level in the rats. In order to verify the validity of the two-step method, we use S-parameter measurements inside the RC to experimentally derive the WBA-SARs with rat-equivalent phantoms and then compare those with the FDTD-calculated ones. It was shown that the difference between the two-step method and the S-parameter measurements is within 1.63dB, which reveals the validity and usefulness of the two-step technique.
ER -
English
