Characterization of submillimeter wave absorbers from 200-600 GHz

Jussi Säily, Antti V. Räisänen

    Research output: Contribution to journalArticleScientificpeer-review

    11 Citations (Scopus)


    This paper presents measurements of both specular and non-specular scattering from several submillimeter wave absorber materials designed for antenna testing and from low-cost carpet materials. The frequency range is 200–600 GHz in specular scattering, and 300–400 GHz in non-specular scattering measurements. The constructed bistatic test bench allows testing of the full continuous angular range of 0°–90°. The measurement results show large differences in performance of different materials. It is shown that reflectivities below −50 dB over limited angular ranges are possible with a correct alignment of the material. Also, low-cost carpet materials have lower than −15 dB reflectivities in most angles, and may be useful in non-critical parts of the antenna test range. The results can be used to optimise the absorber placement inside an antenna range, concerning both best performance and lowest cost.
    Original languageEnglish
    Pages (from-to)71 - 78
    Number of pages8
    JournalInternational Journal of Infrared and Millimeter Waves
    Issue number1
    Publication statusPublished - 2004
    MoE publication typeA1 Journal article-refereed


    • absorbes
    • submillimeter waves
    • specular scattering
    • non-specular scattering


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