Intercomparison of permittivity measurements using the transmission/reflection method in 7-MM COAX

IEEE Antennas and Propagation Society International Symposium 1992 Digest Pub Date : 1992-06-18 DOI:10.1109/APS.1992.221548

E. Vanzura

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引用次数: 2

Abstract

Summary form only given. To aid in standardizing the transmission/reflection (T/R) method, the National Institute of Standards and Technology (NIST) organized a nationwide intercomparison of permittivity measurements in the 50 MHz to 187 GHz frequency range. The T/R method involves calculation of relative permittivity ( in /sub r/) and permeability ( mu /sub r/) from transmitted and reflected scattering parameters measured by a network analyzer. Three sample kits have been circulated among fifteen participating organizations. Each kit will be circulated to five different participants. All three sample kits contain four materials with in /sub r/ ranging from approximately 5 to 20, and one sample kit contains a fifth, high-permittivity sample with in /sub r/ somewhere between 35 and 60. Measurement results are compared with each other and with high-accuracy cavity resonator measurements made by NIST. The commonly implemented Nicholson/Ross algorithm is shown to be less accurate and much more unstable than the Baker-Jarvis algorithm, especially when the sample is longer than a half wavelength.<>

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在7mm同轴电缆中透射/反射法测量介电常数的比较

只提供摘要形式。为了使传输/反射(T/R)方法标准化，美国国家标准与技术研究所(NIST)组织了一项全国性的50mhz至187ghz频率范围内介电常数测量值的比较。T/R法是根据网络分析仪测量的透射散射和反射散射参数计算相对介电常数(in /sub R /)和磁导率(mu /sub R /)。15个参加组织分发了三个样品包。每个工具包将分发给五位不同的参与者。所有三个样品套件包含四种材料，其in /sub r/范围约为5至20，其中一个样品套件包含第五种高介电常数样品，其in /sub r/范围在35至60之间。测量结果相互比较，并与NIST高精度腔谐振器测量结果进行了比较。通常实现的Nicholson/Ross算法被证明比Baker-Jarvis算法更不准确，更不稳定，特别是当样本长于半波长时。

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IEEE Antennas and Propagation Society International Symposium 1992 Digest

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