Accurate measurement of Radio Frequency (RF) component’s passive intermodulation (PIM) and systematic evaluation of PIM’s effect on mobile communication require flexible PIM generator. This work presents a wide-band high dynamic-range PIM generator using a fabric-over-foam (also known as RF Interference Shielding Gasket) as superstrate of low-PIM microstrip line (MS-line). An air gap of 1 mm introduced between the foam and the MS-line to ensure long-term repeatability by avoiding the nonlinearity that can be generated by the metal-to-metal contact. To make the PIM generator adjustable, the foam moved transversely over the MS-line. The size of the gasket selected in such a way that it slightly changes the S-parameters of the MS-line. Due to the variation of the exposure area of the foam (which is an electromagnetic magnetic material) to the electromagnetic (EM) field generated by the MS-line; the PIM level of the MS-line changes with the foam’s location. The minimum PIM level of the proposed generator determined by the PIM level of the MS-line, which is no more than $-125\mathrm{d}\mathrm{B}\mathrm{m}$ @$2\times 43\mathrm{d}\mathrm{B}\mathrm{m}$. However, the maximum PIM level can be as high as $-48\mathrm{d}\mathrm{B}\mathrm{m}$ @$2\times 43\mathrm{d}\mathrm{B}\mathrm{m}$, achieved by placing a gasket piece on the top of the MS-line. The proposed generator verified from $700\mathrm{M}\mathrm{H}\mathrm{z}$ to $2.7\mathrm{G}\mathrm{H}\mathrm{z}$ and all of the measurement results show its feasibility. Moreover, presented PIM generator can be used a single-port or two-port calibration device.

射频（RF）组件的无源互调（PIM）的准确测量以及PIM对移动通信的影响的系统评估需要灵活的PIM生成器。这项工作提出了一种宽带高动态范围PIM发生器，该发生器使用泡沫织物（也称为RF干扰屏蔽垫片）作为低PIM微带线（MS线）的覆层。在泡沫和MS管线之间引入1 mm的气隙，通过避免金属与金属接触可能产生的非线性来确保长期可重复性。为了使PIM发生器可调，泡沫在MS线上横向移动。选择的垫圈尺寸应使其略微改变MS线的S参数。由于泡沫（是电磁材料）对MS线产生的电磁场的暴露区域的变化；MS-line的PIM级别随泡沫的位置而变化。建议的发生器的最小PIM级别由MS线路的PIM级别确定，不超过$--125\mathrm{d}\mathrm{乙}\mathrm{米}$ @$2\times 43\mathrm{d}\mathrm{乙}\mathrm{米}$。但是，最大PIM级别可能高达$--48\mathrm{d}\mathrm{乙}\mathrm{米}$ @$2\times 43\mathrm{d}\mathrm{乙}\mathrm{米}$通过在MS系列的顶部放置垫片来实现。建议的发电机已从$700\mathrm{中号}\mathrm{H}\mathrm{ž}$ 至 $2.7\mathrm{G}\mathrm{H}\mathrm{ž}$所有的测量结果都表明了其可行性。此外，提出的PIM发生器可用于单端口或两端口校准设备。