Standing Wave Reduction in an RFI Laboratory

After review of some general properties of RF absorber materials, several of the standard and semistandard techniques for measuring absorber and anechoic chamber quality are discussed. A general purpose RFI laboratory is described together with a simple technique for evaluating the performance of absorber material as it is actually used. An effective background reflectivity of about 4% from 1 - 10 Gc was measured and is believed to be adequate for many applications.