Dispersive FDTD Modeling of Human Body with High Accuracy and Efficiency

Abstract

We propose a dispersive finite-difference time domain(FDTD) algorithm suitable for the electromagnetic analysis of the human body. In this work, the dispersion relation of the human body is modeled by a quadratic complex rational function(QCRF), which leads to an accurate and efficient FDTD algorithm. Coefficients(involved in QCRF) for various human tissues are extracted by applying a weighted least square method(WLSM), referred to as the complex-curve fitting technique. We also presents the FDTD formulation for the QCRF-based dispersive model in detail. The QCRFbased dispersive model is significantly accurate and its FDTD implementation is more efficient than the counterpart of the Cole-Cole model. Numerical examples are used to show the validity of the proposed FDTD algorithm.

FDTD Algorithm Based on the Modified Lorentz Dispersive Model for the Analysis of the Characteristics of Plasma

“…보다 정확하고 효율적으로 매질의 분산 특성을 분석하 기 위해 2차 복소 유리함수(QCRF: quadratic complex rational function)를 적용한 QCRF-FDTD 알고리즘이 개발되 었다 [19]～ [21] . 이는 가중최소제곱법 기반의 복소 곡선 접합 법을 적용하므로, 다른 기법들과 달리 초기값 없이 계수 를 구할 수 있는 장점이 있다.…”