A Cylindrical Dielectric Surface-Wave Antenna
Boggs, Nicholas A
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A new type of dielectric surface-wave antenna (DSWA) has been proposed using a tapered cylindrical dielectric structure. The structure is radially tapered in permittivity to produce a directive endfire beam that is omnidirectional in the azimuth direction. Unlike a dielectric resonator antenna (DRA) that uses a cavity mode to achieve radiation, this antenna uses a radially-propagating surface wave to create an endfire beam. Numerical analysis was used on various geometric aspects of this kind of antenna to find the most optimal results. Analyzing an analytical approach to the DSWA a tapering scheme based on the modified Hansen-Woodyard condition was applied to create the highest directivity.