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Multipath Effects on Phase Measurements with Continuous Terahertz Waves

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Abstract

We evaluate the effect of multipath waves on terahertz phase measurements due to multiple reflections between the transmitter antenna and the sample. We show that the phase shift introduced by the sample will be biased by a value which depends on the sample position in the terahertz path. We show how to remove the bias and use the technique in the measurement of the index of refraction of Mylar at 194.4 GHz.

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Acknowledgments

The authors would like to acknowledge CNPq, Petrobras S.A., and CAPES for their support.

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Authors and Affiliations

  1. Research Center for Inspection Technologies, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil

    A. H. Cordes, M. G. Albarracin, D. H. Thomas & J. P. von der Weid

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  1. A. H. Cordes
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  2. M. G. Albarracin
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  3. D. H. Thomas
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  4. J. P. von der Weid
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Correspondence to A. H. Cordes.

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Cordes, A.H., Albarracin, M.G., Thomas, D.H. et al. Multipath Effects on Phase Measurements with Continuous Terahertz Waves. J Infrared Milli Terahz Waves 37, 462–472 (2016). https://doi.org/10.1007/s10762-015-0230-0

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  • DOI: https://doi.org/10.1007/s10762-015-0230-0

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