一种基于稻垣模的新型阵列天线设计方法

A New Approach to Antenna Array Design Based on Inagaki Modes

提出一种新型的设计阵列天线的模式方法,即依据阵列天线结构和端口激励数目构造一组辐射场正交基,通过期望辐射场与该组基的正交运算来设计阵列天线。该模式方法以矩量法为基础,基于稻垣模本征方程,严格考虑了阵元间互耦的影响,可以最小二乘意义下拟合期望方向图。此外,辐射场的加权运算也进一步减少了设计的运算量。阵列天线设计实例验证了本文方法的正确性和有效性。

Antenna array design using Inagaki modes is presented in this paper. A positive defined composite operator is defined and a set of orthogonal basis is constructed on the antenna structure and the number of excitations. The pattern is approximated by calculating its projection on the orthogonal basis. The presented design method, based on method of moments and the eignfunctions of Inagaki modes and considering the effect of the mutual coupling, can approximate an arbitrary pattern in the mean-square sense. In addition, the weighted field is applied to simplify the complexity of design procedure. The effectiveness and the correctness of the method are demonstrated by a design example.