Computer-aided design of 3D microwave filter using quasi-planar high Q(u) dielectric resonator

A dielectric resonator filter is proposed for high-speed data communication systems and for multilayer filter applications. The structure is composed of a partially metallized dielectric plate enclosed in a parallelepipedic c avity. This topology allows high integration in a planar-type environment, The proper excitation is ensured by coplanar lines directly integrated on t he dielectric resonator. This structure, easily manufactured, is suitable f or high frequency-filtering and power applications, In order to realize two - and four-pole filters without tuning, some new coupling and frequency com pensation techniques are presented. To compensate for a parasitic effect, a direct optimization method is combined applying a global electromagnetic ( EM) analysis to describe the four-pole filter. Some experiments are perform ed to verify the theoretical design. (C) 2000 John Wiley &d Sons, Inc.