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Dispersion Based Photonic-Crystal Structures for RF Applications
Final technical rept. 15 Jan 2005-1 Apr 2006
DELAWARE UNIV NEWARK DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
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This work provides a framework for establishing dielectric-based naval communication systems, which are more secure and more efficient, compared to current metallic counterparts. Herein are demonstrated applications of RE PhCs in improving the performance of naval communication systems and decreasing scattering cross-section of naval vessels. Dielectric devices were designed, fabricated, and characterized based on the unique dispersion properties of PhCs to achieve confinement, waveguiding, radiation, and filtering in the microwave to millimeter-wave portion of the electromagnetic spectrum. In particular, dispersion-based guiding, namely self-collimation, in 2D and 3D PhCs was experimentally demonstrated. Self-collimation allows for creating non-diffractive materials in which electromagnetic waves can propagate along subwavelength-sized channels without divergence while no specific route is introduced. By combining the self-collimation PhCs, dielectric grating antennas were demonstrated which provide stable performance, compact dimensions, high radiation efficiency, and high coupling efficiency with other dielectric waveguiding devices. We also designed, fabricated, and demonstrated RF channelizers and filters based on the hybrid of properties and lattices of PhCs.
APPROVED FOR PUBLIC RELEASE