An Effective Formulation Based on Approximated Electromagnetic(EM)Mathematic Models of Feed Antennas to Efficient Estimate the Performances of Rotationally Symmetric Parabolic Reflector Antennas
In this paper,an effective formulation based on approximated electromagnetic(EM)mathematic models of feed antennas is developed to efficiently estimate the performances of rotationally symmetric parabolic reflector antennas including spillover and aperture efficiencies.The EM mathematic models employ cosine and sine functions with fractional powers to approximate the co-polarized and cross-polarized components of the fields radiated from the antennas to feed the reflectors,where the closed-form solutions of antenna performances are then obtained.In distinguishing from previous works where only cosine tapers with integer powers are employed to model the co-polarized components of feeds radiation with the cross-polarized components ignored,the present work is a broad extension and provides tremendous flexibility in the modeling of realistic feed antennas.Furthermore it allows one to estimate the impact on the antenna performance due to the existence of cross-polarized components,which had been previously ignored for a feed antenna with an ideal radiation pattern.Numerical examples are presented to demonstrate the analysis.
Shih-Chung Tuan Hsi-Tseng Chou
Department of Communication Engineering,Oriental Institute of Technology,Pan-Chiao,Taiwan Department of Communication Engineering,Yuan Ze University,Chung-Li 320,Taiwan
国际会议
Progress in Electromagnetics Research Symposium 2011(2011年电磁学研究新进展学术研讨会)
苏州
英文
446-449
2011-09-01（万方平台首次上网日期，不代表论文的发表时间）