Analysis of Broadband High-Impedance Ground Plane Antenna Designs

This research ties together computational and experimental analysis of two types of high-impedance ground plane (HIGP) antennas, One type of antenna consists of a proposed two-layer design. The structure consists of a bowtie antenna mounted over the surface of a HIGR The proposed structure was intended to achieve a resonant frequency of 3 GHz and a bandwidth of 48%; however, a design error results in a significant mismatch in operating bands between the antenna and HIGR Experiment results indicate the structure performs poorly across the entire measured band of 2-5 GHz. A new two-layer design is developed and presented. The new design takes advantage of lessons learned such as designing around material properties of readily available materials. Analysis of integrated, or one-layer, HIGP antennas are also presented. The one- layer versions utilize the exact same design parameters as their corresponding two- layer designs; the bowtie radiating element is simply positioned in the plane rather than over, the HIGR Results indicate the design error in the proposed two-layer structure affects the performance of the one-layer version less than the two-layer antenna. A comparison between the original and new integrated HIGP antennas show an improvement in input impedance, but a decrease in bandwidth.Air Force Inst of Tech Wright-Patterson AFB OH School of Engineering and Management is the author of 'Analysis of Broadband High-Impedance Ground Plane Antenna Designs', published 2003 under ISBN 9781423502517 and ISBN 1423502515.