椭圆极化波对大鼠电磁暴露的数值模拟计算

Numerical simulation of electromagnetic exposure of rats using elliptically polarized waves

以椭圆极化波作为波源进行大鼠电磁暴露数值模拟,比较了多个入射方向上大鼠电磁暴露的全身平均比吸收率(WBASAR)。结果发现,椭圆极化波的WBASAR随椭偏率的改变而变化,同时受到入射方向和旋向的影响。将此结果与同方向上线极化波的辐照结果比较发现:在入射功率相同的条件下,椭圆极化波和线极化波电磁暴露的WBASAR结果存在差异,且这种差异随着波源入射方向与大鼠体态的相对位置变化呈现出不同的特点。此外,波源的极化性质、辐照方式以及大鼠本身等因素,同样会使得大鼠重要组织的SAR分布规律产生较大的差异。因此,综合考虑线极化波与非线极化波的电磁暴露结果,可以对电磁暴露剂量进行更加全面的评估。本文的计算为动物电磁暴露剂量的评估提供了方法和数据上的补充。

In this report,we performed numerical simulation of electromagnetic exposure in rats using elliptically polarized waves as the source.By comparing the whole-body specific absorption rate(WBASAR)of electromagnetic exposure for multiple incident directions,it was determined that the WBASAR of elliptically polarized waves change with the polarization state,and is affected by the incident direction and the direction of rotation.Comparing this result to the irradiation results for linearly polarized waves travelling in the same direction,it was determined that the WBASAR results for electromagnetic exposure for these two cases are different under the same incident power.Moreover,the discrepancy presents different characteristics depending on the incident direction of the wave source and the relative positional changes associated with the posture of the rat.In addition,factors such as the polarized nature of the wave source,the irradiation method,and the rat itself,also caused large differences in the distribution of the average specific absorption rate of important tissues in rats.Therefore,considering the exposure results for linearly and non-linearly polarized waves,the exposure dose can be more comprehensively evaluated.The calculations presented in this report provide a method and supplemental data for the evaluation of electromagnetic exposure dose in animals.