Broadband Characterizations of Material Permittivity with a small-sized Open-ended Coaxial Probe

摘要

In this paper a 2.2mm open-ended coaxial probe is selected for a broadband measurement of material permittivity ranging from kHz up to GHz. The measurement is individually carried out at three different frequency ranges: high frequency (HF, 500MHz – 20GHz), median frequency (MF, 10MHz – 1GHz), and low frequency (LF, 1kHz – 15MHz), in view of pertinent aperture admittance models, feasible measurement principles, and required calibrations for system biases. These considerations are discussed and described in turn from high frequency measurements to low frequency tests. Verification of the associated measurement techniques at the three operating frequency regimes is provided by experiments on pure methanol.