强激光与粒子束2012，Vol.24Issue(2)：423-427,5.DOI:10.3788/HPLPB20122402.0423
超高斯波束圆口径天线近场辐射特性
Near-field radiation behaviors of super-Gaussian circular aperture antenna
摘要
Abstract
Based on the aperture field theory, near-field radiation behaviors of super-Gaussian circular aperture antenna are discussed, and the near-field gain expression at focusing point while focusing is obtained. Corresponding simulations are conducted by selecting different observing points of antenna. The results show that the radiation patterns keep invariant in spite of the ratio of aperture radius to beam waist(RAW), when the distance between the observing point and antenna is less than 0. 3 times the fo-cal length, and the super-Gaussian order is greater than 4. Once the observing point lies on the focus, for given RAW, the radia-tion patterns vary with the super-Gaussian order. However, when the RAW is over 4, the radiation patterns keep stable and no sidelobes exist for high-order beams.关键词
圆口径/近场/超高斯分布/聚焦/增益Key words
circular aperture/near field/super-Gaussian distribution/focusing/ gain分类
信息技术与安全科学引用本文复制引用
史信荣,刘元安,刘芳..超高斯波束圆口径天线近场辐射特性[J].强激光与粒子束,2012,24(2):423-427,5.基金项目
中央高校基础研究基金项目(G470216,2009RC0308) （G470216,2009RC0308）
国家自然科学基金项目(60802033,60973111,60873190) （60802033,60973111,60873190）
