Title:
A Novel Technique for Complex Permittivity Measurement Based on a Planar Four-Port Device
Author(s):
Alessandro Ocera, Marco Dionigi, Elisa Fratticcioli, and Roberto Sorrentino,
Source:
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Vol./Issue/Date:
VOL. 54, NO. 6, JUNE 2006
Year:
2006
Page(s):
2568-2575
Keywords:
Dielectric properties, microwave measurement,
permittivity measurement.
Abstract:
A novel technique for the measurement of the complex
permittivity of materials is presented that overcomes many
limitations of the conventional measurement methods. The RF
signal transmitted through a transmission line loaded with the
material under test is combined with a reference signal using a
quadrature hybrid in such a way that the complex permittivity
can be measured by simply detecting the two output amplitudes.
This technique requires a simple calibration procedure, provides
good accuracy, and avoids expensive vector measurements, thus
combining the advantages of transmission methods, in terms
of good accuracy, with those of resonant methods, in terms of
scalar measurements. Two microstrip implementations have been
realized for measurements at 2.35 and 10 GHz, showing very good
accuracy to be achieved in both frequency ranges. The measured
permittivities have been compared with those obtained with a
resonant and transmission method and with data from literature,
resulting in a very good agreement for both and tan .
Document:
Reference Id:
139
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