Electrical and Computer Engineering ETDs

Publication Date

Fall 10-16-2018


A narrow-band, rugged, complementary-split-ring (CSR) slotted waveguide antenna (SWA) with significant size reduction is presented. The antenna is to be vertically front mounted on a land vehicle, with a horizontally polarized fan-beam radiation pattern. The radiation characteristics of a CSR slot in the narrow-wall of a rectangular waveguide are studied for the first time in this work. Both simulation and experimental results show that the complementary-split-ring slot radiates a linearly polarized wave with a total efficiency and gain close to those of conventional longitudinal slots, while the proposed CSR slots have a maximal outer diameter of 0.23λ0, much smaller compared to conventional half-wavelength longitudinal slots. The CSR slotted waveguide antenna provides, approximately, 55% size reduction, with high directivity, low return loss, and very high power handling capability for S-band applications. A set of periodic air-filled corrugations is added to the other narrow-wall of the rectangular waveguide to improve the overall gain of the antenna. Experimental data is presented to further validate simulation results.


high power microwave, split ring, metamaterial, antenna, multipaction, breakdown

Document Type




Degree Name

Electrical Engineering

Level of Degree


Department Name

Electrical and Computer Engineering

First Committee Member (Chair)

Christos Christodoulou

Second Committee Member

Edl Schamiloglu

Third Committee Member

Mark Gilmore

Fourth Committee Member

Joseph Costantine

Fifth Committee Member

Julie Lawrance