Physics – Instrumentation and Detectors
Scientific paper
2010-09-22
IEEE Trans. Microwave Theor. Tech. 57:2257,2009
Physics
Instrumentation and Detectors
12 pages, 21 figures
Scientific paper
10.1109/TMTT.2009.2027160
This paper presents a simple and effective wideband method for the determination of material properties, such as the complex index of refraction and the complex permittivity and permeability. The method is explicit (non-iterative) and reference-plane invariant: it uses a certain combination of scattering parameters in conjunction with group-velocity data. This technique can be used to characterize both dielectric and magnetic materials. The proposed method is verified experimentally within a frequency range between 2 to 18 GHz on polytetrafluoroethylene and polyvinylchloride samples. A comprehensive error and stability analysis reveals that, similar to other methods based on transmission/reflection measurement, the uncertainties are larger at low frequencies and at the Fabry-Perot resonances.
Chalapat Khattiya
Li Jian
Paraoanu Gh.- S.
Sarvala Kari
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