【摘要】 针对时域物理光学方法求解无源互调问题的局限性,提出基于"场路结合"的数值分析方法,建立非线性金属结的等效电路模型并将其引入到全波方法中,通过全波方法与等效电路相结合的方式来分析系统的无源互调干扰.计算实例表明,该方法可以精确地计算由于金属接触非线性引起的无源互调及其作为二次辐射源所激发的电磁场,避免了时域方法在电大尺寸问题上计算的积累误差以及只能对处于远场区的简单微波结构的无源互调效应进行求解的问题.本文提出的场路结合数值分析方法为微波部件无源互调效应的研究提供了新的思路与方法.更多还原

【Abstract】 A newnumerical method for the study of passive intermodulation is presented against the limitations of time-domain physical optics( TD-PO). The equivalent circuit model of the metal junction that introduced into the full-wave method is established. The passive intermodulation products and the electromagnetic field excited by passive intermodulation products as secondary sources can be analyzed by full-wave method with nonlinear circuit model. Compared with the timedomain physical optics,the proposed method can eliminate the accumulated error from time iteration on objects large in term of wavelength,and can be applied on complicated microwave structures. The numerical results demonstrate the effectiveness of the method in this paper which provides a newmethod for the analysis of nonlinear problem.更多还原