Radio frequency electromagnetic fields in large conducting enclosures: effects of apertures and human bodies on propagation and field-statistics
Radio frequency electromagnetic fields in large conducting enclosures: effects of apertures and human bodies on propagation and field-statistics
复制标题
DOI：
10.1109/temc.2006.873856
复制
发表时间：
2006-06
影响因子：
2.1
通讯作者：
M. Robinson;J. Clegg;A. Marvin
中科院分区：
文献类型：
--
作者：
M. Robinson;J. Clegg;A. Marvin
通过两种模型模拟了电大谐振腔（屏蔽室）中的射频传播：多个谐振模式的统计组合和计算电磁模拟[传输线矩阵（TLM）方法]。本工作的目的是研究乘客和窗户对飞机和其他交通工具中电磁场（EMF）的影响。多模式模型与在屏蔽室中进行的测量的比较表明，随着电磁损耗的增加，两个内部天线之间的传输减少，并且其频率响应中的转折点较少。该频率响应的自相关性提供了对共振的复合Q因子的有用估计，并且表明腔室的Q从清空时的10 000的数量级的值降低到增加窗户时的1000，并且当充满人时降低到100。TLM模拟提供了关于电场强度随位置的统计变化的进一步有用信息。
Radio frequency propagation in an electrically large resonant chamber (a screened room) was simulated by two models: a statistical combination of multiple resonant modes and a computational electromagnetic simulation [the transmission line matrix (TLM) method]. The purpose of this work was to investigate the effects of passengers and windows on electromagnetic fields (EMF) in aircraft and other vehicles. Comparison of the multimode models with measurements made in a screened room showed that as the electromagnetic losses increased, the transmission between two internal antennas was reduced, and there were fewer turning points in its frequency response. The autocorrelation of this frequency response provided a useful estimate of the composite Q-factor of the resonances and showed that the Q of the chamber was reduced from a value of the order of 10 000 when emptied to 1000 when windows were added and when filled with people to 100. The TLM simulation provided further useful information about the statistical variation of electric field strength with position.