源搅拌混响室优化设计研究

Research on design optimization of source-stirred reverberation chamber

根据谐振腔理论,分析了源搅拌混响室的搅拌机理,在此基础上确定了优化模式分布和优化发射天线设置是实现源搅拌混响室优化设计的主要途径。计算、讨论了不利于源搅拌混响室场均匀性实现的典型模式分布,并在分析混响室模式密度、品质因数带宽特性基础上,最终确定了期待的混响室模式分布,为源搅拌混响室腔体尺寸优化设计提供了依据和方法。主要基于实验的方法分析了源搅拌混响室发射天线的驻波比问题,提出从解决发射天线驻波比问题入手来优化源搅拌混响室的发射天线设置即源搅拌方案的思路。

According to the resonant cavity theory,the stirring mechanism of source-stirred reverberation chamber（SSRC）is analyzed,it specifies that optimizations of the mode distribution and the emission antenna＇s setup are main approaches for implementing design optimization of SSRC.The typical mode distribution which will not be propitious to achieve field uniformity in SSRC is calculated and discussed.Then,on the basis of analyzing characteristics of the mode density and the quality factor bandwidth in SSRC,the expected mode distribution in SSRC is confirmed finally,which provides foundation and method for design optimization of cavity dimension of SSRC.Problems with regard to VSWR of the emission antenna in SSRC are analyzed mainly using experimentation.The way to optimize the emission antenna＇s setup in SSRC,i.e.optimization of source-stirred scheme,with solving problems with regard to VSWR of the emission antenna is put forward.