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This work presents two completely printable chipless RFID tags for low-cost item labeling. The first developed tag is based on circular ring resonators where each resonator codifies a tag coding notch position. Therefore, the tag structure is scalable, printable and compact size. Moreover, a novel encoding methodology is employed to preserve the notch width and position while coding. The second developed...
X-band folded reflectarray (FRA) antenna is designed and implemented. The proposed FRA provides compactness, reliability, broadband with high efficiency. The reflectarray utilizes multilayer patch cells that receive the waves and twist them from vertical to horizontal polarization with the proper phase. Variable microstrip line lengths control the phases of scattering parameters. The FRA is designed...
W-band planar perforated dielectric substrate lens antenna is designed and implemented. The lens utilizes a perforated dielectric multilayer substrate that converts spherical wavefront into planar wavefront. The dielectric perforation is performed with air holes, and each hole has a uniform diameter through all layers for simplicity. The transmission coefficient phase is controlled locally. The lens...
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