Evaluation of the Equivalent Circuit Parameters of Microstrip Discontiuuities through Perturbation of a Resonant Ring (Short Papers)

A resonant technique for evaluating the equivalent circuit of reciprocal microstrip discontinuities is described. The complex Z parameters of a discontinuity are related to the change in resonant frequencies and Q factors of a microstrip ring it perturbs. As an example, measurements made on inductive posts are presented and compared with theoretical values.