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

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dc.contributor.authorPoland, William Hamiltonen
dc.contributor.committeechairDavis, Bradley A.en
dc.contributor.committeememberBrown, Gary S.en
dc.contributor.committeememberEllingson, Steven W.en
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2025-05-31T08:01:16Zen
dc.date.available2025-05-31T08:01:16Zen
dc.date.issued2025-05-30en
dc.description.abstractThis 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.en
dc.description.abstractgeneralThis works uses a numerical technique called the Method of Moments to simulate the behavior of radio waves traveling over a randomly rough (i.e. ocean-like) surface. This work considers a monopole antenna on the surface as the source of radio waves and computes how waves travel out from the antenna and interact with the ocean-like surface. An exact formulation is used to consider all the effects that such waves have on both the antenna and the surface. The results from this work can be used to better understand how radio waves travel in an ocean-like environment, which can help inform decisions for designing communication systems.en
dc.description.degreeMaster of Scienceen
dc.format.mediumETDen
dc.identifier.othervt_gsexam:43962en
dc.identifier.urihttps://hdl.handle.net/10919/134945en
dc.language.isoenen
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectElectromagneticsen
dc.subjectMethod of Momentsen
dc.subjectScatteringen
dc.subjectRough Surfaceen
dc.titleAn Investigation on the Effect of Ground Plane Roughness on Antenna Radiation Characteristicsen
dc.typeThesisen
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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