Date of Award

3-2003

Document Type

Thesis

Degree Name

Master of Science

Department

Department of Electrical and Computer Engineering

First Advisor

William D. Wood, PhD

Abstract

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.

AFIT Designator

AFIT-GE-ENG-03-17

DTIC Accession Number

ADA415385

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