The paper I wrote was published in February 2021, and available for free access.
S11 Calibration of Cut-Off Circular Waveguide with Three Materials and Related Application to Dielectric Measurement for Liquids
https://t.co/E2FwscRzRx
Kouji Shibata, “S11 Calibration of Cut-off Circular Waveguide with Three Materials and Related Application to Dielectric Measurement for Liquids, ” IEICE Trans. Electron., vol. E104- C, no.2, 2021-2 (published as Advance Publications as follows). https://t.co/WWhT3gecLl