A compact passive intermodulation calculation method for the nonlinear source with noticeable size is proposed and demonstrated. By approximating the transmission factors of linear carrier and nonlinear passive intermodulation to be the non‐dimensional ratios between the current and power based on the reciprocal calculation principle, the PIM synthetize on a nonlinear source with notable size can ignore the complicated microwave characteristic analysis, while just need the accumulation of each PIM product of each nonlinear cell, which significantly simplifies the calculation process for the passive intermodulation product on a practical microwave device. The study proposed a compact solution to solve PIM product from the nonlinear source with big scale, which can be extended to the PIM analysis of practical microwave device with unevenly distributed PIM product.

中文翻译：

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基于互易原理的非线性面源无源互调产物的计算

提出并论证了一种用于非线性源的紧凑的无源互调计算方法。根据互易计算原理，通过将线性载波和非线性无源互调的传输因子近似为电流和功率之间的无量纲比率，在尺寸显着的非线性源上合成的PIM可以忽略复杂的微波特性分析，而仅需要每个非线性单元的每个PIM积的累加，就可以大大简化实际微波设备上无源互调积的计算过程。该研究提出了一种紧凑的解决方案，可以从非线性源大规模解决PIM产品，