【作者】 陈博； 曹佳东； 贺一峰； 刘骞； 王五兔；

【Author】 Chen Bo;Cao Jiadong;Liu Qian;He Yifeng;Wang Wutu;Institute of Xi’an Space Radio Technology;

【机构】 西安空间无线电技术研究所；

【摘要】 基于反射面纵向偏焦的特征,本文提出了一种覆球波束天线实现方案。该方案通过馈源位置纵向偏焦,在反射面口径场上形成平方律的相位分布,然后利用口径场上相位分布特征对远场方向图的影响,形成覆球波束。相比传统通过反射面赋形或者通过螺旋天线实现覆球波束的方案,本文的方案只需要调整反射面的焦径比和馈源位置,参数少,设计简单,而且易于加工实现。更多还原

【Abstract】 Based on the characteristics of longitudinal defocusing of the reflector,this paper proposes an implementation scheme for an earth coverage beam antenna.This scheme forms a square-law phase distritmtion on the aperture field of the reflector surface by vertically focusing the feed position,and then utilizes the influence of the phase distribution characteristics on the far-rield pattern to form an earth coverage beam.Compared to the traditional method of shaping the reflector surface or using a spiral antenna to achieve earth coverage beams,the proposed method only needs to adjust the focal diameter ratio of the reflector and the position of the feed,with fewer parameters,simple design,and easy processing and implementation.更多还原