This thesis presents a solution to the problem of receiving a signal in the shadow and fringe areas. Theoretical and experimental investigation of the field behind an obstacle in a line of sight transmission path for UHF / microwave signals has resulted in a new approach to the analysis of electromagnetic fields in the shadow of an obstacle.
Analysis using this approach showed the field
to consist of varying amplitude and phase distribution. Additional analysis predicted an increase in received signal could be achieved if correlation between the field and antenna
structure could be obtained. This was accomplished with a new antenna design.
The thesis presents experimental and photographic evidence to support the theory. A novel technique involving the matching of the antenna structure to the field distribution, resulted in an increase of received signal in the diffracted field of up to 4 dB.
| Identifer | oai:union.ndltd.org:ADTP/217185 |
| Date | January 1991 |
| Creators | Hamilton, Shaun Ashley, mikewood@deakin.edu.au |
| Publisher | Deakin University. School of Sciences |
| Source Sets | Australiasian Digital Theses Program |
| Language | English |
| Detected Language | English |
| Rights | http://www.deakin.edu.au/disclaimer.html), Copyright Shaun Ashley Hamilton |
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