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J Electromagn Eng Sci > Volume 13(4); 2013 > Article
Journal of Electromagnetic Engineering and Science 2013;13(4):251-258.
DOI: https://doi.org/10.5515/JKIEES.2013.13.4.251   
Parameter Selection Procedure of Parabolic Reflector Antenna for the Optimum Synthetic Aperture Radar Performances
Seong Sik Yoon1, Jae Wook Lee1, Taek Kyung Lee1, Dong Woo Yi2
1Department of Electronics, Telecommunication and Computer Engineering, Korea Aerospace University
2Agency for Defense Development
Abstract
A procedure for antenna parameter selections is proposed that considers the relationships between synthetic aperture radar performance and the antenna parameters of a parabola-type reflector antenna with a central flat dish. The effects of a central dish designed for weight reduction on the antenna beam pattern are also quantitatively analyzed using commercially available software based on the physical optics algorithm. The results of the theoretical analysis and simulation predict that a larger size of the central dish results in an increase in the sidelobe level, which is the reason for the increase in two important ambiguities, such as range ambiguity ratio (RAR) and azimuth ambiguity ratio (AAR). The dependence of RAR and AAR on Pulse repetition frequency is also analyzed and discussed.
Key words: Azimuth Ambiguity, Backscattering Coefficient, Central Dish, PRF, Range Ambiguity, Reflector Antenna, Sidelobe Level

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