THEORETICAL STUDY OF A CIRCULARLY POLARIZED SYMMETRIC CASSEGRAIN ANTENNA USING A CPSS SUBREFLECTOR

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Authors
  1. Roy, J.E.
  2. Shaker, J.
  3. Shafai, L.
  4. Morin, G.A.
Corporate Authors
Manitoba Univ, Winnipeg MAN (CAN) Dept of Electrical Engineering;Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
This final report presents the work done under DREO contract #W7714-0-9439/01-SS. This contract deals with the design of a symmetric Cassegrain antenna using a flat subreflector made out of a Circular Polarization Selective Surface (CPSS). The aim of the work was to minimize the blockage incurred by the subreflector and in so doing, to improve the antenna characteristics that are adversely affected by the blockage, namely the Sidelobe Level Ratio, the cross-polarization level and the gain. The first part of this document presents the specifications and the design features of the overall antenna. Many specifications have remained tentative, owing to the absence of a satisfactory design for the CPSS subreflector. The second part of this document presents the analyses of the CPSS subreflector. Three analysis techniques were used herein: the Finite Difference Time Domain (FDTD) method, the Method of Moments as implemented in NEC2 and a spectral domain technique operating with the dyadic Green's function as developed at the University of Manitoba.
Keywords
Multilayer antennas;Blockage;Method of Moments;Periodic structure;CPSS (Circular Polarization Selective;Reflector antennas
Report Number
DREO-CR-93-630 — Contractor Report (Final)
Date of publication
31 Mar 1992
Number of Pages
160
DSTKIM No
97-01307
CANDIS No
501750
Format(s):
Hardcopy;Document Image stored on Optical Disk

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