An historical, theoretical and experimental study of the broadband antenna problem with application to short pulse probing radars

The influence of finite radiating elements on the transmission and reception of large instantaneous bandwidth signals is considered. A description of simple broadband radiators is given together with a detailed explanation of both frequency independent and travelling wave phenomena as applied to antennas. The response, to transient excitation, of conventional broadband radiators is examined on the basis of a literature survey and criteria summarizing the essential antenna characteristics are established. The properties of several transient antennas are evaluated in this context and one, the Wohlers antenna, is selected for further study.Topics such as the characteristic impedance of planar transmission lines, the principle modes existing on coaxial and biaxial transmission lines, the continuous impedance transformer, and the open termination of resonant structures, are considered in some detail and the results are employed in the fabrication and testing of several prototype Wohlers antennas. The physical and electrical characteristics of the Wohlers antenna aie related in an empirical manner and the overall performance is evaluated using both pulse and monocycle waveforms. The results of preliminary tests, involving the location of dielectric interfaces in lossy media, are given and those aspects of the UHF short pulse radar requiring further refinement are indicated.

Name thesis:degree_name

Master of Engineering (M.Eng.)

Level thesis:degree_level

Master's

Discipline thesis:degree_discipline

Engineering, Electrical

Grantor dc:publisher

Carleton University

Year dc:date.issued

1976

Author dc:creator

• Greenlay, Terrence Oliver

Statement dc:rights

• Copyright © 1976 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.

Language dc:language.iso

en

DOI

10.22215/etd/1976-13018

OAI identifier oai:identifier

oai:carleton.scholaris.ca:20.500.14718/29673