Christian Doppler Laboratory for Technology Guided Electronic Component Design and Characterization, Institute of Microwave and Photonic Engineering, Graz University of Technology, 8010 Graz, Austria.
Sensors (Basel). 2023 May 7;23(9):4548. doi: 10.3390/s23094548.
This study presents a new method for measuring the propagation constant of transmission lines using a single line standard and without prior calibration of a two-port vector network analyzer (VNA). The method provides accurate results by emulating multiple line standards of the multiline calibration method. Each line standard was realized by sweeping an unknown network along a transmission line. The network need not be symmetric or reciprocal, but must exhibit both transmission and reflection. We performed measurements using a slab coaxial airline and repeated the measurements on three different VNAs. The measured propagation constant of the slab coaxial airline from all VNAs was nearly identical. By avoiding disconnecting or moving the cables, the proposed method eliminates errors related to the repeatability of connectors, resulting in improved broadband traceability to SI units.
本研究提出了一种新的方法，使用单端口标准和无需对两端口矢量网络分析仪（VNA）进行预先校准，即可测量传输线的传播常数。该方法通过仿真多线校准方法的多个线标准，提供了准确的结果。每个线标准都是通过在传输线上扫频未知网络来实现的。网络不必对称或互易，但必须同时表现出传输和反射。我们使用板状同轴线进行了测量，并在三个不同的 VNA 上重复了测量。所有 VNA 测量的板状同轴线传播常数几乎相同。通过避免断开或移动电缆，该方法消除了与连接器重复性相关的误差，从而提高了到 SI 单位的宽带可追溯性。
