Fast cavity-mode algorithm for analysis of radiation of power bus
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摘要: 电路板电源总线的分析非常复杂,虽然传统腔模方法是分析电路板电源总线的一种非常有效的方法,但是该方法具有收敛速度慢,计算时间长和不能分析电源总线辐射发射的缺点.在该算法的基础上,改进二重级数和形式的电源总线辐射发射方法并提出了单一级数和形式的电源总线辐射发射表达式.在此基础上指出了单一级数腔模理论解的适用条件,并对该快速算法的收敛性进行了分析.分析表明,该方法减少了传统二重级数求和的计算工作量,提高了收敛效率并节省了计算时间,而且能够有效逼近双级数腔模辐射算法的计算结果.通过对电路板的辐射发射数值仿真验证了该算法的有效性和正确性.Abstract: It is very complicated to analyze the power-bus structure of the printed board circuit(PCB). Cavity-mode method is an effective way to analyze the power-bus structure of the printed board circuit, however, the algorithm is hard to converge. Therefore, the total computing time of the algorithm to analyze the power-bus of PCB is long. And the method is not applied to compute the radiation field of the structure. Based on the method, a fast cavity-mode algorithm was presented for analyzing the radiation emission problem of the power-bus structures in PCB design. In this method, the double series summation cavity-mode expression which is used to get the far-field characteristic of a parallel plane structures is simplified for using a Cauchy contour integration. The working condition of the method was deduced in our work. The convergence of the fast algorithm was obtained either. It is shown that this fast method is more efficient than the convention cavity-mode method for the small computation time, the high convergence and the same accuracy. Simple examples were analyzed to validate the proposed formulation.
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