An Investigation on the Effect of Ground Plane Roughness on Antenna Radiation Characteristics

This work considers the performance of a thin-wire monopole antenna over both a flat ground plane and a randomly-varying rough surface. The Method of Moments with the Electric Field Integral Equation (EFIE) is used to account for all coupling interactions. Monte Carlo averaging is used to compute results over multiple rough surface realizations, which follow the Pierson-Moskowtiz surface model. The results investigate the effect of increasing surface roughness, via increased wind speed, on the antenna input impedance and resulting total field. In particular, the antenna input reactance is found to be very sensitive to variations in the surface near the base of the antenna. The directionality of the Pierson-Moskowitz surface due to wind direction is also considered. Results show no significant difference in the radiated field pattern cuts in the parallel versus perpendicular wind directions.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Electrical Engineering

Department dc:contributor.department

Electrical Engineering

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

2025

Author dc:creator

• Poland, William Hamilton

Chair dc:contributor.committeechair

• Davis, Bradley A.

Committee members dc:contributor.committeemember

• Brown, Gary S.
• Ellingson, Steven W.

• Electromagnetics
• Method of Moments
• Scattering
• Rough Surface

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en

Dc Identifier Other

vt_gsexam:43962

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/134945