Estimation of Whole-Body Average SAR in Human Models Due to Plane-Wave Exposure at Resonance Frequency

2010 ◽  
Vol 52 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Akimasa Hirata ◽  
Osamu Fujiwara ◽  
Tomoaki Nagaoka ◽  
Soichi Watanabe
Keyword(s):  
Plane Wave ◽  
Resonance Frequency ◽  
Wave Exposure ◽  
Whole Body ◽  
At Resonance ◽  
Human Models

Estimation of the whole-body averaged SAR of grounded human models for plane wave exposure at respective resonance frequencies

2012 ◽  
Vol 57 (24) ◽  
pp. 8427-8442 ◽  
Author(s):  
Akimasa Hirata ◽  
Kazuya Yanase ◽  
Ilkka Laakso ◽  
Kwok Hung Chan ◽  
Osamu Fujiwara ◽  
...  
Keyword(s):  
Plane Wave ◽  
Wave Exposure ◽  
Whole Body ◽  
Human Models ◽  
Resonance Frequencies

scholarly journals Distances between Rats in Reverberation Chambers Used for Large-Scale Experiments

2021 ◽  
Vol 21 (2) ◽  
pp. 148-152
Author(s):  
Sangbong Jeon ◽  
Wook Jang ◽  
Ae-Kyoung Lee ◽  
Hyung-Do Choi ◽  
Jeong-Ki Pack ◽  
...  
Keyword(s):  
Plane Wave ◽  
Large Scale ◽  
Specific Absorption Rate ◽  
Three Dimensional ◽  
Wave Exposure ◽  
Whole Body ◽  
Reverberation Chamber ◽  
Working Volume ◽  
Reverberation Chambers ◽  
Sar Analysis

We investigate the whole-body average specific absorption rate (WBA-SAR) of rats under various plane wave exposure characteristics, including different polarizations, incidence angles, distances between rats, and total number of rats. Unlike many other studies, we start our SAR analysis from one rat and expand it to 27 rats facing random directions in a three-dimensional area. In a one-rat analysis, we examine how the incidence direction and polarization affect the SAR of a single rat. Moreover, we look into how various incidence polarizations behave differently after they are transmited through a rat, the information of which is then used to analyze the effect of spacing among 27 randomly arranged rats. Next, we analyze the effect on spacing of the 27 rats deployed under a 52-plane-wave exposure, which is introduced to mimic a realistic reverberation chamber (RC) environment. We show the deviation in WBA-SAR according to the distance between rats, which provides guidelines for selecting the appropriate rat distance based on the number of animals and the exposure deviation within a limited working volume in an RC for large-scale experiments.

Whole-body average SAR measurement using flat phantoms for radio base station antennas and its applicability to adult and child human models

2018 ◽  
Vol 74 (1-2) ◽  
pp. 93-102 ◽  
Author(s):  
Takahiro Iyama ◽  
Teruo Onishi ◽  
Kensuke Sasaki ◽  
Tomoaki Nagaoka ◽  
Lira Hamada ◽  
...  
Keyword(s):  
Base Station ◽  
Whole Body ◽  
Human Models ◽  
Base Station Antennas

Development, Evaluation, and Sensitivity Analysis of Parametric Finite Element Whole-Body Human Models in Side Impacts

2016 ◽  
Author(s):  
Eunjoo Hwang ◽  
Jingwen Hu ◽  
Cong Chen ◽  
Katelyn F. Klein ◽  
Carl S. Miller ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Finite Element ◽  
Whole Body ◽  
Side Impacts ◽  
Human Models ◽  
Development Evaluation

scholarly journals CHARACTERISTICS OF CASED ELECTRICAL INSULATION SYSTEM OF ASYNCHRONOUS ELECTRICAL MACHINES AT RESONANCE FREQUENCY

2019 ◽  
Vol 2019 (4) ◽  
pp. 48-55
Author(s):  
G.V. Bezprozvannych ◽  
◽  
I.A. Kostukov ◽  
A.V. Roginskiy ◽  
◽  
...  
Keyword(s):  
Resonance Frequency ◽  
Electrical Machines ◽  
Electrical Insulation ◽  
Insulation System ◽  
At Resonance

Frequency Reconfigurable Epsilon Negative Metamaterial Antenna

2017 ◽  
Vol 7 (3) ◽  
pp. 1473
Author(s):  
Arrauzah Razak ◽  
M. K. A. Rahim ◽  
H. A. Majid ◽  
N. A. Murad
Keyword(s):  
Electric Field ◽  
Resonance Frequency ◽  
Software Tool ◽  
Unit Cell ◽  
Reconfigurable Antenna ◽  
Circular Shape ◽  
At Resonance ◽  
Metamaterial Antenna ◽  
Frequency Reconfigurable Antenna ◽  
Radius Size

This paper proposes metamaterial (MTM) inspired frequency reconfigurable antenna based on thecircular electric field coupled (ELC) resonator. It is composed of circular shape ELC resonator with the radius size of 7 mm. By inserting two switches between the gaps at both side of the circular ELC resonator, it is possible to switch ON or OFF the unit cell. The antenna has been simulated using CST Microwave Studio software tool. The simulation result shows that the proposed antenna is capable of reconfiguring between two different frequencies which are2.18 GHz and 2.64 GHz. The simulated bandwidth at -10 dB is 4.12 % at resonance frequency of 2.18 GHz and 8.7% at 2.64 GHz

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