【作者】 徐超龙； 雷振亚；

【Author】 XU Chao-long;School of Electronic Engineering, Xidian University;

【机构】 西安电子科技大学电子工程学院；

【摘要】 本文将时域有限差分(FDTD)法应用于稳态平面波入射生物组织时的比吸收率(SAR)研究,并从多个角度进行较为详细的分析。首先,对球面多层透镜进行理论分析;然后,对生物组织进行建模,研究稳态平面波直接入射到生物组织时的电场分布图和SAR值;最后,通过球面多层透镜匹配到生物组织,在稳态平面波入射情况下,分析生物组织的电场分布图和SAR值。仿真计算结果证明,通过球面多层透镜匹配到生物组织,获得同样的SAR值时,可有效的降低平面波的入射功率。更多还原

【Abstract】 In this paper, the Finite-difference time-domain method(FDTD) was used in the research of the specific absorbed rate(SAR),when the steady plane wave entering biological tissue, and there are detailed analyses from multiple perspectives. First of all, making a theoretical analysis of spherical multilayer lens; then,modeling the biological tissue,studying the electric field distribution and the value of SAR when plane wave incident directly to the biological tissue; Finally, matching the spherical multilayer lens to biological tissue, in the case of steady plane wave entering, analyzing the electric field distribution and SAR values of biological tissue. To obtain the same SAR value,results of simulation show that the incident plane wave power was effectively reduced when matching the biological tissue by multilayered spherical lens.更多还原