微波混沌腔体中的散射特性研究

Research on scattering in microwave chaotic cavity

以计算机机箱为研究目标,开展了电磁波耦合入计算机机箱腔体的散射问题研究.通过对其散射矩阵元的讨论和分析发现:可以通过辐射散射测量得到系统散射矩阵的系综平均;随着腔体损耗的增加,腔体散射系数的波动性减小;随着腔体损耗的进一步增加,插入相移分布逐渐趋于均一分布.通过Dyson圆系综讨论了归一化散射矩阵,计算机机箱腔体中存在波混沌散射.根据随机矩阵理论,微波混沌腔体的归一化阻抗矩阵具有统计通用性,且只与系统的损耗有关.

The scattering inside the computer box is studied. Some results are found through scattering matrix elements. The ensemble-averaged scattering matrix can be obtained by the measured radiation scattering. With the increase of cavity loss, scattering fluctuations are reduced, and insertion phase shift distribution is becoming more and more uniform. Based on the Dyson’s circular ensemble, the scattering behavior within computer box is found to be chaotic. According to RMT, normalized impedance matrix within the microwave chaotic cavity is universal in their statistical description, depending only upon the value of a single dimensionless cavity loss-parameter.