EXPERIMENTAL EVALUATION OF JUNCTION CIRCULATORS - A REVIEW

The adjustment of any microwave device should always reflect as far as possible its physical properties. The purpose of the paper is to summ arise existing experimental techniques for the characterisation of the classic 3-port junction circulator for which the inphase eigennetwork may be approximately represented by an electric wall boundary conditi on. Some important possibilities include its matrix descriptions, its corresponding eigenvalues and its complex gyrator circuit. New experim ental techniques for the evaluation of the immittances and frequencies of the split eigennetworks are separately described.