| This dissertation focuses on the realization of reduced-size high-Q resonators and filters inside reduced-height substrates for integrated tiled array systems. The vertical integration, evanescent-mode, effective medium and ceramic/polymer EBG concepts are explored. These concepts are the enabling techniques and complementary to each other. The vertically integrated filters are shown to have very low loss (as low as 0.27 dB) and a reduced circuit footprint (up to 75%). The evanescent-mode filters are presented to have low loss (as low as 0.61 dB), a reduced circuit area (up to 75%) and a wider spurious-free region (up to 116% increase). The effective medium resonators are shown to have a high Q which is only enabled by the structure design of materials. Resonators and filters inside multi-functional ceramic/polymer EBG substrates are proved to have a high Q (up to 1,000) and a wide spurious-free region. The exploration of these concepts are enabled by both novel fabrication techniques and theoretical analysis. Truly 3-D layer-by-layer stereolithography, LTCC processing and novel ceramic fabrications are the enabling techniques for the realization of the aforementioned concepts and their fabrication characterizations are studied herein. Quasi-static analysis is used to investigate the evanescent-mode and effective medium concepts to avoid time-consuming brute force full-wave simulations. A novel hybrid equivalent circuit/full-wave analysis based filter synthesis technique is proposed to design complex filters/duplexers and their integration with antennas in a time-efficient and accurate manner. |
