This paper presents a transmission-only (TO) approach that solves the long-standing problem of transmission phase ambiguity. The approach considers a linear frequency-dependent phase approximation to derive the phase mode value analytically and uniquely based on three parameters: the first phase jump frequency, the start frequency, and the start phase value. This formulation leads to a unique propagation constant, easy-to-compute for low-band and wideband applications. In addition, the approach presents a non-iterative loss extraction method based on analytical formulation and curve-fitting. Beyond, the approach corrects standing waves’ effect, making it suitable for matched and mismatched lines without any initial guess of the material properties. Numerical and experimental validations confirm the proposed approach for weakly and highly dispersive microstrip samples, including low- and high-loss dielectrics.

中文翻译：

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通过线性相位近似进行单样本复杂介电表征的独特解决方案


本文提出了一种仅传输（TO）方法，解决了长期存在的传输相位模糊问题。该方法考虑线性频率相关相位近似，基于三个参数：第一相位跳跃频率、起始频率和起始相位值，以分析方式唯一地导出相位模式值。该公式可产生独特的传播常数，易于计算，适用于低频带和宽带应用。此外，该方法提出了一种基于解析公式和曲线拟合的非迭代损失提取方法。此外，该方法还可以纠正驻波效应，使其适用于匹配和不匹配的线，而无需对材料特性进行任何初步猜测。数值和实验验证证实了针对弱和高色散微带样品（包括低损耗和高损耗电介质）提出的方法。