Accession Number : ADA303494

Title :   Evaluation of Rotman Lenses for Space-Based Radar,

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s) : Moffat, John W.

PDF Url : ADA303494

Report Date : DEC 1995

Pagination or Media Count : 66

Abstract : The Space Based Radar (SBR) R&D Project at DREO has been investigating the feasibility of the application of a number of different technologies to space based wide area surveillance using microwave radar. One of the technologies investigated was the Rotman lens implementation of a Fourier transform beam forming network. A number of Rotman lenses were designed and manufactured in stripline microwave structure under a development contract. The expected performance was not achieved. A study was initiated to investigate possible causes of this performance deficiency. This study was divided into two main thrusts. First the lenses were assessed physically using ultrasonic and X ray technologies, with a confirmation of the results by the sectioning and subsequent microscopic examination of one of the lenses. Following that, some simple stripline structures were measured in a microwave lab in order to gain an understanding of the difficulties of measuring the permittivity of the dielectric material within the structure. This report describes the experiments performed and the results obtained.

Descriptors :   *SEARCH RADAR, *RECONNAISSANCE SATELLITES, *LENS ANTENNAS, CANADA, MICROWAVE EQUIPMENT, DIELECTRIC PROPERTIES, FEASIBILITY STUDIES, RADAR EQUIPMENT, STRIP TRANSMISSION LINES, X BAND, SPACE BASED.

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE