Monostatic reflectivity and transmittance of radar absorbing materials at 650 GHz

A. Tamminen, Anne Lönnqvist, J. Mallat, A. V. Räisänen

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    Abstract

    Transmittance and monostatic reflectivity of different radar absorbing materials at 650 GHz are presented. The reflectivity was measured in plane-wave conditions in a radar cross-section (RCS) range with vertical polarization. The lowest reflectivity level (-70 dB) was achieved with commercial absorbers TK THz RAM and Firam-500 with oblique incidence angles. Floor carpets were also studied, and the reflectivity level of those was found to be sufficiently low (from -50 to -60 dB) for use in antenna test ranges. Results agree with earlier studies and indicate the applicability of the RCS method in reflectivity measurements also at 650 GHz.
    Original languageEnglish
    Pages (from-to)632 - 637
    Number of pages6
    JournalIEEE Transactions on Microwave Theory and Techniques
    Volume56
    Issue number3
    DOIs
    Publication statusPublished - 2008
    MoE publication typeA1 Journal article-refereed

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    Keywords

    • Antenna test range
    • Monostatic reflectivity
    • Radar absorbing materials (RAMs)
    • Radar cross section (RCS)

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