Evaluation of a novel tubular sample holder for dielectric measurements with Abdulnour´s method

This paper assesses the accuracy of a rectangular waveguide pierced by a tubular load sample holder for measuring liquid materials at high temperatures with a formulation based on Abdulnour´s method. The measurement technique is derived from the transmission line method. The sample holder is adapted from a section of a rectangular waveguide pierced by a tubular load for high temperature measurements at 2.45 GHz. Simulations of the loaded sample holder are carried out with CST Microwave Studio^® for several values of sample permittivity. The accuracy of the technique is evaluated by comparing these values to those obtained from Abdulnour´s extraction model. It is shown that by properly choosing a set of calibration standards the technique can be quite accurate.