Dual Polarization Synthesis and Optimization of Cylindrical Offset Reflector Antenna for Cosecant-squared Radiation Pattern
Publish place: Journal of Communication Engineering، Vol: 7، Issue: 1
Publish Year: 1397
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JCESH-7-1_009
تاریخ نمایه سازی: 22 مهر 1398
Abstract:
This paper presents the shaping optimization of an S-band cylindrical offset reflector antenna with cosecant-squared radiation pattern in elevation plane. The cross section of the antenna is mathematically modeled by a polynomial function and optimized by the genetic algorithm to obtain the desired pattern for both TE and TM polarizations. The physical optics method together with the uniform theory of diffraction is used to efficiently calculate the radiation pattern during the optimization. Numerical results show that the cosecant-squared radiation pattern can be achieved with good accuracy for angular span of 50◦. The computed radiation pattern agrees well with method of moments as well as CST software and deviates less than about 0.7 dB, on average, from the ideal cosecant-squared pattern.
Keywords:
Cosecant-squared pattern , genetic algorithm , physical optics , reflector antenna , uniform theory of diffraction
Authors
Vahid Mohtashami
Department of Electrical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
amirreza attari
department of electrical engineering, Ferdowsi university of Mashhad, Mashhad, Iran
Tahereh Azad
Department of Electrical Engineering, Ferdowsi University of Mashhad
Reza Vahdani
Department of Electrical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran