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提出了一种新的激励源模型,该模型成功克服了传统RWG函数不能在天线与球体连接处添加馈源的问题,同时,对格林函数进行加减自由空间格林函数的处理,解决当源点和场点接近于或位于球面时收敛慢的问题。通过计算位于球表面的单极子天线输入特性,并与相关文献结果进行了对比,结果表明分析方法的正确性和有效性。最后,分析了位于球表面的探针馈电贴片天线的特性,其分析结果与FEKO仿真结果一致性较好。
A new model of incentive source is proposed. The model successfully overcomes the problem that traditional RWG function can not add feed at the connection between antenna and sphere. Meanwhile, Green’s function is treated by addition and subtraction of free space Green’s function, And field points close to or in the sphere of convergence slow problem. The input characteristics of the monopole antenna located on the surface of the ball are calculated and compared with the related literatures. The results show the correctness and validity of the analysis method. Finally, the characteristics of the probe-fed patch antenna located on the surface of the sphere are analyzed. The analysis results are in good agreement with the FEKO simulation results.