Millimeter-wave, terahertz, and mid-infrared transmissionthrough common clothing

DOI PDF 3 Citations
  • J. E. Bjarnason
    Department of Electrical Engineering , University of California, Santa Barbara, California 93106
  • T. L. J. Chan
    Department of Electrical Engineering , University of California, Santa Barbara, California 93106
  • A. W. M. Lee
    Department of Electrical Engineering , University of California, Santa Barbara, California 93106
  • M. A. Celis
    Department of Electrical Engineering , University of California, Santa Barbara, California 93106
  • E. R. Brown
    Department of Electrical Engineering , University of California, Santa Barbara, California 93106

Search this article

Description

<jats:p>This letter reports electromagnetic transmission measurements through cloth samples from eight types of fabrics common in garments and baggage. The transmission at millimeter-wave and terahertz frequencies was measured with a custom ErAs:GaAs tunable photomixing spectrometer. The IR transmission between 3 and 8μm was measured with a Fourier-transform infrared spectrometer. All samples were usefully transparent at millimeter-wave frequencies (up to 300GHz) based on a 3dB criterion, but became progressively opaque at higher frequencies in a highly sample-dependent manner. This is explained by the samples becoming “optically dense” in the THz region, so that the transmission becomes exponentially dependent on sample thickness. The attenuation in the IR region is very high (⩾25dB) except in two samples (rayon and nylon), whose exceptional transparency (e.g., −12dB in nylon) is attributed to pores intrinsic to the material.</jats:p>

Journal

Citations (3)*help

See more

Details 詳細情報について

Report a problem

Back to top