The occurrence of passive intermodulation (PIM) is inevitable in high-power microwave devices. It interferes with wireless communication and radar systems, resulting in severe deterioration of receiving performance. So far, narrowband PIM analyzers have been realized for different business bands. However, they are incapable of testing wideband systems. To solve this problem, rack-mounted analyzers piled with multiple narrowband analyzers were implemented. While such solutions significantly increase the volume, cost, and power consumption, they cannot provide a wide, continuous bandwidth for PIM localizations. Aiming to solve this problem, we propose a novel solution for realizing ultrawideband PIM analyzers. Based on the principle of cooperative radio frequency and baseband (RF-BB) nulling, we demonstrate an experimental prototype working within a continuous frequency band covering three octaves, exhibiting promising potential in PIM testing applications.

中文翻译：

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基于超宽带双载波归零的无源互调测试

在大功率微波器件中，无源互调（PIM）的发生是不可避免的。它会干扰无线通信和雷达系统，导致接收性能严重下降。到目前为止，已经实现了针对不同业务频段的窄带 PIM 分析仪。但是，它们无法测试宽带系统。为了解决这个问题，部署了多台窄带分析仪堆叠在一起的机架式分析仪。尽管此类解决方案显着增加了体积、成本和功耗，但它们无法为 PIM 本地化提供宽的、连续的带宽。为了解决这个问题，我们提出了一种实现超宽带 PIM 分析仪的新颖解决方案。基于协作射频和基带 (RF-BB) 调零原理，