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http://dx.doi.org/10.5515/KJKIEES.2010.21.4.371

Analysis of the CATR Equipped with the Novel Shark-Fin Shaped Serrations by the Height Modulation  

Choi, Dong-Won (Department of Electronics & Electrical Engineering, Dankook University)
Choi, Hak-Keun (Department of Electronics Engineering, Dankook University)
Park, Jae-Hyun (Department of Electronics & Electrical Engineering, Dankook University)
Lim, Seong-Bin (Korea Aerospace Research Institute)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.21, no.4, 2010 , pp. 371-380 More about this Journal
Abstract
The CATR(Compact Antenna Test Range) is a testing facility which is to provide the uniform plane wave by using the reflector. As the ripple of the uniform plane wave caused by the diffraction rays at the edge of the reflector, serrations are attached at the edge of the reflector to minimize the ripple of the uniform plane wave in the CATR. The diffraction field of the serration is normally analyzed by the Fresnel diffraction formula which is expressed as the double integration, and the structure of the serration is expressed as Fourier series to apply the double integration of the Fresnel diffraction formula. In this paper, the novel shark-fin shaped serrations which have the height modulation of the adjacent serrations are proposed. And the triangular serrations and the novel shark-fin shaped serrations are compared to confirm that the performance of the quiet zone by the shark-fin shaped serrations is better than by the triangular serrations. It is also confirmed that the novel shark-fin shaped serrations which have the height modulation of the adjacent serrations are lower ripple than which have the same height of the adjacent serrations. Accordingly, the novel shark-fin shaped serrations with the height modulation can be used at the edge of the reflector to provide the uniform plane wave in CATR.
Keywords
Serration; CATR; Diffraction; Quiet Zone; Fresnel-Field;
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