A frequency-varying method for simultaneous measurement of complex permittivity and permeability with an open-ended coaxial probe
- 1 December 1998
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques
- Vol. 46 (12), 2145-2147
- https://doi.org/10.1109/22.739296
Abstract
To measure the complex permittivity and permeability of materials simultaneously with an open-ended coaxial probe, one needs at least two independent reflections. Based on the fact that frequency is an independent variable for the probe's reflection coefficient, a new concept, namely the frequency-varying method (FVM), which achieves the independent reflections via changing frequency, has been proposed. Since the electromagnetic (EM) properties of materials themselves are functions of frequency, the FVM introduces interpolation techniques into the process of extracting EM parameters from multiple reflection coefficients. The successful experimental results on radar-absorbing coatings show the feasibility and good prospects of the FVM for characterizing EM properties of materials in situ. Compared with the thickness-varying method (TVM), which makes two measurements with two samples of different thicknesses, the FVM needs only one frequency-swept reflection measurement, thus simplifying and speeding up the measurement process, and improving accuracy and repeatability. Furthermore, the FVM has the ready capability to be extended to multiple-parameter measurements, and we may also find potential applications in other fields.Keywords
This publication has 11 references indexed in Scilit:
- Determination of electromagnetic properties of materials using flanged open-ended coaxial probe-full-wave analysisIEEE Transactions on Instrumentation and Measurement, 1995
- Bilayered dielectric measurement with an open-ended coaxial probeIEEE Transactions on Microwave Theory and Techniques, 1994
- Analysis of an open-ended coaxial probe with lift-off for nondestructive testingIEEE Transactions on Instrumentation and Measurement, 1994
- Permittivity measurements using open-ended sensors and reference liquid calibration-an uncertainty analysisIEEE Transactions on Microwave Theory and Techniques, 1992
- Use of open-ended coaxial line sensor with a laminar or liquid dielectric backed by a conducting planeIEE Proceedings H Microwaves, Antennas and Propagation, 1992
- Noninvasive electrical characterization of materials at microwave frequencies using an open-ended coaxial line: test of an improved calibration techniqueIEEE Transactions on Microwave Theory and Techniques, 1990
- A critical study of the open-ended coaxial line sensor technique for RF and microwave complex permittivity measurementsJournal of Physics E: Scientific Instruments, 1989
- ANA Calibration Method for Measurements of Dielectric PropertiesIEEE Transactions on Instrumentation and Measurement, 1983
- Reflection of an open-ended coaxial line and application to nondestructive measurement of materialsIEEE Transactions on Instrumentation and Measurement, 1981
- Coaxial Line Reflection Methods for Measuring Dielectric Properties of Biological Substances at Radio and Microwave Frequencies-A ReviewIEEE Transactions on Instrumentation and Measurement, 1980