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2012-06-28
Resolving Phase Ambiguity in the Inverse Problem of Reflection-Only Measurement Methods
By
Progress In Electromagnetics Research, Vol. 129, 405-420, 2012
Abstract
We have applied the phase unwrapping technique to resolve the phase ambiguity problem arising from complex expressions of scattering parameters, for reflection-only measurement configurations, since, at some instances, only one side of the sample under test is accessible for electromagnetic measurements. We considered two different measurement configurations for testing the applicability of the phase unwrapping technique as: 1) two identical samples with different lengths flushed by a short-circuit termination and 2) one sample shorted by a varying short-circuit termination. For each measurement configuration, the underlying expressions for the reflection scattering parameters are derived. For both cases, we evaluated the suitability of the phase unwrapping technique by considering a highly-dispersive medium (distilled water) as our test sample. We note that continuity of the real part of the complex wavelength is a key issue in the unwrapping technique for (one-port) reflection-only measurements.
Citation
Ugur Cem Hasar Joaquim Jose Barroso Cumali Sabah Yunus Kaya , "Resolving Phase Ambiguity in the Inverse Problem of Reflection-Only Measurement Methods," Progress In Electromagnetics Research, Vol. 129, 405-420, 2012.
doi:10.2528/PIER12052311
http://www.jpier.org/PIER/pier.php?paper=12052311
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