曲线宽频带线天线分析的数值方法

【作者】 杨放；

【导师】 郭陈江；

【作者基本信息】 西北工业大学 ， 电磁场与微波技术， 2004， 硕士

【摘要】 本文就曲线宽频带线天线的数值分析方法展开研究，首先介绍了宽频带天线的发展，实现天线宽频带的常用方法和曲线天线的研究现状，然后在直线加载天线满足的方程的基础上用两种方法推导了曲线天线满足的推广的海伦积分方程(Mei’s方程)，讨论了不同基函数下方程的数值解法。这种方法的积分方程的积分核里含有复杂的微积分运算，为了简化计算，本文在推广的海伦积分方程的基础上，对方程进行了简化，推导了Nakano方程，并以平面阿基米德螺旋天线，平面等角螺旋天线，轴向模圆柱螺旋天线，具有固定升角的圆锥螺旋天线和圆锥等角螺旋天线为例，用矩量法求解了天线上的电流分布，研究了螺旋天线辐射的宽频带特性，所得的结果均与参考文献吻合很好。为了验证程序的正确性，还对阵子天线的电流分布进行了计算。这种方法具有运算简单，编程容易，精度高的特点，解决了任意形状曲线天线的分析问题。更多还原

【Abstract】 The thesis focus on the numerical analytical method of curved broadband wire antennas. First, the paper introduced the development of broadband antennas, the common measures to broaden antennas’ bandwidth and the study on curved antennas. Second, the generalized Halen integral equation (Mei’s equation) was derived based on the three basic equations of wire antennas by two means and its numerical solution method was discussed. Since complicated differential and integral operations were involved in the kernel of the integral equation, we simplified the equation and got the Nakano equation. As instances, the planar Archimedean spiral antenna, the planar equiangular spiral antenna, the monofilar helical antenna, the conical helical antenna with fixed ascending angle and the conical equiangular-spiral antenna were analyzed through the moment method. All of the results matched fairly well with the references and experiment results. To prove the program was correct, the straight wire antenna was analyzed. The method proved to be efficient for the analysis of arbitrary wire antennas.更多还原