An intermodulation (IM) tuner with 2π rad phase and 40-dB amplitude range is demonstrated in this article. The solution is based on the coherent nonlinearities combination among three nonlinear sources connected with star topology. By combining the IM components from these three nonlinear sources with 2π/3 rad phase offset for each pair, the final output IM signal can be tuned in the whole 2π rad region. Targeted to the special IM measurement for passive devices, the minimal output IM amplitude can be adjusted to be lower than -112 dBm at 2 × 43 dBm. This article can be used as a standard source for the IM phase and amplitude calibration while the tuner can also be used to realize IM distortion product mitigation for the passive devices.

中文翻译：

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使用星形拓扑的多重非线性叠加的电互调调谐器


本文演示了具有 2π rad 相位和 40 dB 幅度范围的互调 (IM) 调谐器。该解决方案基于以星形拓扑连接的三个非线性源之间的相干非线性组合。通过组合来自这三个非线性源的 IM 分量（每对具有 2π/3 rad 相位偏移），最终输出 IM 信号可以在整个 2π rad 区域内调谐。针对无源器件的特殊IM测量，在2×43dBm时最小输出IM幅度可调整至低于-112dBm。本文可用作 IM 相位和幅度校准的标准源，同时调谐器还可用于实现无源器件的 IM 失真产物减轻。