Characterizing Precision Coaxial Air Lines as Reference Standards for Cryogenic S-Parameter Measurements at Milli-kelvin Temperatures
Characterizing Precision Coaxial Air Lines as Reference Standards for Cryogenic S-Parameter Measurements at Milli-kelvin Temperatures
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表征精密同轴空气管路作为毫开尔文温度下低温 S 参数测量的参考标准
DOI：
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发表时间：
2023
期刊：
影响因子：
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通讯作者：
N. Ridler
中科院分区：
文献类型：
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作者：
J. Skinner;M. Stanley;Jonas Urbonas;S. D. de Graaf;T. Lindström;N. Ridler
同轴微波器件和接口在毫开尔文(MK)温度下的S参数的精确表征是构建高性能量子计算系统的关键。同轴空气-介质传输线(空气传输线)通常被用作S常温参数测量的主要参考标准。首次研究了在MK温度下利用这种空气管线作为主要参考标准的可行性。然而，对于在这样的温度下使用的空气管道，必须首先根据其特性阻抗和传播常数来准确地表征它们。本文描述了在室温(这里采用296K)和MK温度(约25MK)下表征空气线的技术。测量结果证明了在MK温度下使用空气管路作为主要参考标准的可行性。
Accurate S-parameter characterization of coaxial microwave devices and interfaces at milli-kelvin (mK) temperatures is essential for building high performance quantum computing systems. Coaxial air-dielectric transmission lines (air lines) are used routinely as primary reference standards for S-parameter measurements at room temperature. For the first time, the feasibility of utilizing such air lines as primary reference standards at mK temperatures is investigated. However, for air lines to be used at such temperatures, they must first be characterized accurately in terms of their characteristic impedance and propagation constant. This paper describes techniques for characterizing air lines at both room temperature (taken here to be 296 K) and mK temperature (around 25 mK). The measurement results demonstrate the feasibility of using air lines as primary reference standards at mK temperatures.