00000000nam 2200000zi 4500
0019.954278
003CaOODSP
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008250820e199511  oncad    bt  f000|| eng d
040 |aCaOODSP|beng|erda|cCaOODSP
041 |aeng|beng|bfre
043 |an-cn---
0861 |aDR52-17/67-1995E-PDF
1001 |aMorin, Gilbert A.,|d1952- |eauthor.
24512|aA circular polarization selective surface made of resonant helices / |cby Gilbert A. Morin.
264 1|aOttawa : |bDefence Research Establishment Ottawa, |cNovember 1995.
300 |a1 online resource (ix, 38 pages) : |billustrations, charts.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aDREO report ; |vno. 1269
500 |aDigitized edition from print [produced by Defence Research and Development Canada].
500 |a"PCN 05C01."
504 |aIncludes bibliographical references (page 11).
520 |a"A circular polarization selective surface (CPSS) is a surface that reflects one sense of circular polarization but transmits the other sense. While linear polarization selective surfaces (usually abbreviated PSS) are fairly common, CPSS's have attracted attention only recently. In this report, a new CPSS with improved characteristics is presented and potential applications are discussed. This new CPSS is made of special square helices. Because the helices can be supported at their extremities, this CPSS does not need a dielectric support as other CPSS's do and therefore can be made more transparent. The response of the CPSS to a plane wave excitation was simulated using the method of moments for thin wires. Mutual coupling and losses were taken into account. Simulation results show that the radar cross-section of the surface to one circular polarization is 50 times higher than to the other polarization. A CPSS has been fabricated. Transmission measurements show that the surface permits most of one circular polarization to pass through while rejecting the other polarization. The rejection ratio is more than 15 dB. These results are in good agreement with theory. Three potential applications of CPSS's in the field of reflector antennas are reduction of sub-reflector blockage in dual reflector antennas, frequency reuse through polarization diversity in a dual-offset reflector and design of a mirror antenna for circular polarization"--Abstract, page iii.
546 |aIncludes abstracts in English and French.
650 0|aRadio waves|xPolarization.
650 0|aRadar.
650 6|aOndes radioélectriques|xPolarisation.
650 6|aRadar.
7102 |aDefence Research Establishment Ottawa, |eissuing body.
830#0|aDREO report ;|vno. 1269.|w(CaOODSP)9.941661
85640|qPDF|s1.23 MB|uhttps://publications.gc.ca/collections/collection_2025/rddc-drdc/DR52-17-67-1995-eng.pdf
986 |aPCN 05C01