Scattering Analysis of Reflectarray Antennas Illuminated by a Point Source for Near Field Focus Applications
The scattering and diffraction mechanisms of reflecting and transmitting arrays illuminated by the radiation of a point source for a general near-field focus problem are summarized.In particular,the phenomena are interpreted by the ray decompositions of Floquet waves and result in the solutions,analogous to the ordinary UTD-type formulations for the phased array antennas with a proper parameter mapping.In this approach,the radiations of periodically located current sources are first decomposed into Floquet modes,in which every mode is equivalent to the radiation of continuous current sources with additional linear phase impressions.Fast convergence in the radiation computation can be achieved because relatively few modes will propagate to the target zone with the rest being evanescent.The ray decomposition is per-formed by asymptotically evaluating the radiation integral of each Floquet mode and interprets the total fields in terms of rays directly radiated from the aperture and diffracted from aperture truncations.
Shih-Chung Tuan Hsi-Tseng Chou
Department of Communications Engineering,Oriental Institute of Technology,Pan-Chiao,Taiwan Department of Communications Engineering,Yuan Ze University,Chung-Li,Taiwan
国际会议
Progress in Electromagnetics Research Symposium 2014(2014年电磁学研究新进展学术研讨会)
广州
英文
1638-1641
2014-08-01（万方平台首次上网日期，不代表论文的发表时间）