00000nam 2200000zi 4500 9.954279 CaOODSP 20250922124732 m o d f cr bn||||||||| 250820e199512 oncad bt f000|| eng d CaOODSP eng rda CaOODSP eng eng fre n-cn--- DR52-17/68-1995E-PDF Moffat, John W., 1932- author. Evaluation of Rotman lenses for space-based radar / by J.W. Moffat. Ottawa : Defence Research Establishment Ottawa, December 1995. 1 online resource (xv, 56 pages) : illustrations, charts. text txt rdacontent computer c rdamedia online resource cr rdacarrier DREO report ; no. 1271 Digitized edition from print [produced by Defence Research and Development Canada]. "PCN 041BD." Includes bibliographical references (pages 51-53). "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 measuring the permittivity dielectric material within the structure. This report describes experiments performed and results obtained"--Abstract, page iii. Includes abstracts in English and French. Beamforming. Space-based radar. Formation de faisceau. Radars spatiaux. Defence Research Establishment Ottawa, issuing body. DREO report ; no. 1271. (CaOODSP)9.941661 PDF 3.90 MB https://publications.gc.ca/collections/collection_2025/rddc-drdc/DR52-17-68-1995-eng.pdf PCN 041BD