HYBRID MODE ANALYSIS OF PARALLEL COUPLED INSET DIELECTRIC GUIDES

The inset dielectric guide has shown considerable potential for circui t and antenna applications. In the paper, an efficient hybrid mode met hod, based on integral equation formulation and Galerkin's procedure, is presented for a rigorous analysis of parallel coupled inset dielect ric guides. In comparison to experimental data, this model is seen to give more accurate calculations of the propagation and coupling charac teristics than achieved in previous publications. Numerical results ar e presented to illustrate the influence of various structural paramete rs on frequency dependent coupling characteristics. It is found that h igh and flat coupling coefficients can be obtained by using very small guide separation and by the appropriate choice of slot height. Theref ore this structure appears to be very useful for broadband coupler app lications.