A Hybrid MoM/FDTD Method for Dosimetry of Small Animal in Reverberation Chamber

被引：15

作者：

Chakarothai, Jerdvisanop ^{[1
]}

Wang, Jianqing ^{[2
]}

Fujiwara, Osamu ^{[1
]}

Wake, Kanako ^{[3
]}

Watanabe, Soichi ^{[3
]}

机构：

[1] Nagoya Inst Technol, Dept Informat Engn, Nagoya, Aichi 4668555, Japan

[2] Nagoya Inst Technol, Dept Comp Sci & Engn, Nagoya, Aichi 4668555, Japan

[3] Natl Inst Informat & Commun Technol, Koganei, Tokyo 1848795, Japan

来源：

IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY | 2014年 / 56卷 / 03期

关键词：

Finite-difference time-domain (FDTD) method; hybrid method; method of moments (MoMs); reverberation chamber (RC); specific absorption rate (SAR); EXPOSURE SYSTEM; REQUIREMENTS; NEWBORN;

D O I：

10.1109/TEMC.2014.2304958

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A hybrid approach combining the method of moment (MoM) and the finite-difference time-domain (FDTD) method is applied to a problem of evaluating specific absorption rates (SARs) in a small rat inside a reverberation chamber (RC). The hybrid method is an alternative technique used to overcome the problem of poor convergence for a solution of the FDTD method in analyzing the RC. First, the RC with a dipole or a helical antenna is designed numerically to function properly at 2 GHz. Then, the MoM/FDTD method is used to calculate the whole-body average SAR (WBA-SAR) for a small animal inside an open cavity. The results are compared with those obtained with the FDTD method in order to verify accuracy. The SAR distributions when stirrers are rotating are also determined. Finally, it is numerically found that the ratio of the WBA-SAR of the 118 g rat to the mean squared electric field is 0.149 (mW/kg)/(V/m)(2) and an input antenna power of 2.2 W is required to produce a WBA-SAR of 4 W/kg for our designed chamber.

引用

页码：549 / 558

页数：10

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