Novel iteration procedures of a hybrid method combining MoM and scattered-field FDTD method for electromagnetic dosimetry

2003 IEEE Topical Conference on Wireless Communication Technology Pub Date : 2003-10-15 DOI:10.1109/WCT.2003.1321489

S. Mochizuki, S. Watanabe, M. Taki, Y. Yamanaka, H. Shirai

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引用次数: 8

Abstract

Health effects of human-body exposure to the near field of a mobile communication device have been investigated with knowledge of the electromagnetic power absorption in human heads during cellular-telephone use. One of the most powerful numerical calculation methods for biological electromagnetic compatibility (Bio-EMC) problems is the finite-difference time-domain (FDTD) method. However accurate models of curved structures, which are closely related to the antenna characteristics, are difficult to realize in the FDTD method. Because recent devices have more complex antennas, it is not easy to precisely evaluate dose characteristics in the human body exposed to the near field from such devices by only using the FDTD method. The objective of this study is to establish a numerical hybrid method combining the advantage of different numerical calculation methods such as the MoM/FDTD method proposed in the literature in order to accurately analyze the complex Bio-EMC problem. In this paper, novel iteration procedures are introduced into the previously reported hybrid MoM/FDTD method. We also show the validity of application of this method to Bio-EMC problems.

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电磁剂量法中最小模量法与散射场时域有限差分法相结合的新迭代方法

对人体暴露于移动通信设备近场对健康的影响进行了调查，了解了使用移动电话时人体头部的电磁功率吸收。时域有限差分法(FDTD)是求解生物电磁兼容(Bio-EMC)问题最有效的数值计算方法之一。然而，与天线特性密切相关的曲面结构的精确模型在时域有限差分法中难以实现。由于近年来器件的天线结构更为复杂，仅用时域有限差分法难以精确地评估近场暴露在人体中的剂量特性。本研究的目的是结合文献中提出的MoM/FDTD等不同数值计算方法的优点，建立一种数值混合方法，以准确分析复杂的Bio-EMC问题。本文将新的迭代过程引入到先前报道的混合MoM/FDTD方法中。我们还证明了该方法在生物电磁兼容问题中的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2003 IEEE Topical Conference on Wireless Communication Technology

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