双波源同向交替入射下大鼠的电磁暴露仿真  

Numerical simulation of electromagnetic exposure in rats with alternate incidence of double wave sources

作　　者：彭怀禹 李孟达 齐红新 王向晖[1] 张杰[1] PENG Huaiyu;LI Mengda;QI Hongxin;WANG Xianghui;ZHANG Jie(Laboratory of Biophysics,School of Physics and Electronic Science,East China Normal University,Shanghai 200241,China)

机构地区：[1]华东师范大学物理与电子科学学院生物物理实验室,上海200241

出　　处：《辐射研究与辐射工艺学报》2021年第5期61-68,共8页Journal of Radiation Research and Radiation Processing

基　　金：国家自然科学基金项目(31600675)资助。

摘　　要：利用电磁仿真研究了1.5 GHz和9.4 GHz双波源同向交替入射时,入射组合方式和交替时间间隔对大鼠全身平均比吸收率(SARw)和组织平均比吸收率(SARa)的影响,并与单波源入射时的SARw和SARa进行了比较。仿真结果表明:1.5 GHz与9.4 GHz双波源同方向交替入射时,大鼠模型的SARw值和SARa值均受到入射组合方式的影响,且随着交替时间间隔的增加呈现非线性升高趋势;入射总功率相同的情况下,双波源交替入射时的SARw值处于两个波源分别入射时的两个SARw值之间。而两交替入射波源均为背部入射短轴极化时睾丸组织SARa值比两个波源单独作用时的最大SARa值高出31.2%。脾脏的SARa值则在双波源交替背部入射(1.5 GHz,长轴极化;9.4 GHz,短轴极化)比单波源入射最大SARa值高出18.9%。In this study,the whole-body specific absorption rate(SAR w)and tissue average specific absorption rate(SAR a)of rats under alternatively incident microwave exposure(1.5 GHz and 9.4 GHz)were calculated by finite-difference time-domain(FDTD).The effects of combined and alternating microwave exposures on the SAR w and SAR a values of rats were discussed and compared with those of single frequency irradiation.Numerical simulation of electromagnetic exposure revealed that under double-source alternating irradiation,both SAR w and SAR a values of rats were affected by the combined incidences.With the increment in the duration of alternating exposure,both SAR w and SAR a tended to increase nonlinearly.On comparison with SAR w and SAR a values obtained from single frequency irradiation,it was found that the SAR w value of double-source alternating irradiation was limited within the two SAR w values that were determined by two individual irradiation frequencies,corresponding to 1.5 GHz and 9.4 GHz.However,the SAR a value of testis tissues that back-incident short-axis polarization of double source alternating irradiation is 31.2%higher than the maximum SAR a value of the two wave sources acting alone.The SAR a value(1.5 GHz,long-axis polarization;9.4 GHz,short-axis polarization)of the spleen is 18.9%higher than the maximum SAR a value of the single-wave source when the double-source is incident back.

关 键 词：复合电磁场 时域有限差分法 电磁暴露 比吸收率 

分 类 号：Q64[生物学—生物物理学] TL929[核科学技术—核燃料循环与材料]