Engineering the Resonant Cavities in Substrate Integrated Waveguide Technology

This paper presents a review of the major applications of substrate integrated waveguide (SIW) cavities and of the various techniques proposed in the last years to engineer the resonant cavities in SIW technology. The aim of engineering the SIW cavities is multifold, and includes the size reduction, the loss minimization, and the optimization of the resonant modes pattern. A variety of topologies of modified SIW cavity resonators are presented, together with their advantages and disadvantages, and several applications are described and discussed.