Miniaturized electromagnetic band gap structures for wireless applications

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The objective is to develop miniaturized and wideband Electromagnetic Band Gap (EBG) structures for applications in two frequency regimes: The lower portion of the microwave regime and the THz regime.In the lower microwave regime, two classes of applications will be targeted: EMI filtering and switching noise suppression in high-speed packages and structures, and the design of low-profile antenna and high-gain antenna arrays. Presently there is no effective solution for the problem of switching noise and spurious propagation in high-speed boards and packages. Based on our previous work on noise mitigation in printed circuit boards, we expect the miniaturized structures proposed here to provide effective suppression in chip packages and for small circuit boards that are increasingly used for higher-density applications. In Antennas, EBG structures have proven to provide enhanced performance leading to higher gain and efficiency. However, since the drive for miniaturized and wideband antennas have been relentless, for EBGs to enhance the performance of small antennas, EBGs must be miniaturized to create sufficient homogeneity in the antenna medium. In earlier works, we have demonstrated that EBGs can decrease mutual coupling between adjacent planar antennas in antenna array applications. Miniaturized EBGs will have the potential to decrease the distance between adjacent antennas and thus achieve higher antenna density leading to higher antenna array gain per unit area.For miniaturization, we will use high-k materials. Wideband EBG structures will be developed based on the concept of low-dispersion planar (metallization) and non-planar (photonic crystals) non-resonating EBGs.Recent years have witnessed a dramatic increase in the THz technology due to its unexplored potential in sensor-related technologies. In such regimes, nanotechnology in conjunction with advanced materials will be critical in achieving resonators with tunable capacitive and inductive properties. Our research thrust will be on developing effective computational tools to model novel photonic band gap crystals and structures.