Field uniformity characteristics of an asymmetric structure reverberation chamber by FDTD method

The conventional reverberation chamber usually has a rectangular structure including mode-stirrers or mode-tuned stirrers to obtain the field uniformity inside the chamber. This paper explains a way to improve the field uniformity in an asymmetric structure instead of a conventional rectangular structure with right-angled planes. Two types of asymmetric structure were considered. One was an asymmetric reverberation chamber using quadratic residue diffuser (QRD) and another was an asymmetric chamber with oblique enclosure including fixed randomly made diffusers (RMD). The FDTD simulation method was used to analyse the field homogeneous characteristics of these two types asymmetric reverberation chambers.