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A new free-space calibration technique for materials measurement

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2 Author(s)
Bartley, P.G. ; Innovative Meas. Solutions, Inc., Portsmouth, VA, USA ; Begley, S.B.

A new method for performing a full two-port s-parameter calibration in free-space is presented. The proposed calibration technique computes the error coefficients from measurements made on an empty fixture and a measurement made on a metal plate of known thickness. Time-domain gating was employed. This technique requires fewer and simpler standards than the existing thru-reflect-line (TRL) and thru-reflect-match (TRM) calibration techniques. It requires the same calibration standards as the gated-reflect-line (GRL) method but doesn't require performing a coaxial or waveguide calibration at the end of the cables connected to the antennas. Permittivity calculated from measurements, calibrated using this technique, made on a material sample appear to be superior to results published using the TRL and TRM calibration technique and the same as those for a GRL calibration.

Published in:

Instrumentation and Measurement Technology Conference (I2MTC), 2012 IEEE International

Date of Conference:

13-16 May 2012