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(a) Free-space transmitted phase measurement system and (b) Teflon calibration data where the theoretical (dashed) curve is calculated from the relation with .
vs frequency for experimental data (solid curve), simulation data (dashed curve), and simulation data shifted by 0.15 GHz (dotted curve).
Phase change of vs frequency (a) raw experimental data (dotted curve), (b) experimental data with 360 ° corrections (solid curve), and (c) simulation data with 360 ° corrections (dashed curve).
Refractive index vs frequency (a) calculated from measured phase (solid curve), (b) from full numerical simulation of the S matrix (dashed curve), and (c) measured in the wedge experiment5 (black diamonds).
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