Browsing by Author "Schuette, David Benjamin"

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    The Design and Analysis of a Conformal Spiral Antenna Structure for an Ultra-Wide-Band Radar System
    (North Dakota State University, 2016) Schuette, David Benjamin
    This thesis explores the design, simulation, and analysis of two conformal spiral antenna structures that are used for an ultra-wide-band (UWB) bistatic radar. The radar antenna system operates over a frequency range from 0.9 GHz to 6.5 GHz. The UWB spiral antenna was initially derived for a planar substrate, then conformed to the spherical embodiment. A microstrip tapered balun feed structure was designed to provide a balanced signal from the radar to the antennas. This work focuses on how well the newly designed antenna system compares to the radar kit's pro- vided planar bow-tie antennas. In particular, the comparisons between simulations and prototype measurements are presented. It is shown that a spiral antenna and structure can be conformed to a 127.0 mm diameter sphere and have little e ect on the radar's performance when compared to a larger planar bow-tie antenna design.