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Frequency selective surfaces for radio astronomy
Authors:Yoshihisa Irimajiri  Toshiaki Takano
Institution:(1) The Department of Astronomy, The Graduate School of Science, The University of Tokyo, 113 Tokyo, Japan;(2) Nobeyama Radio Observatory, The National Astronomical Observatory, 384-13 Nagano, Japan
Abstract:Frequency selective surfaces (FSSs) with the Jerusalem-cross array configuration have been developed for simultaneous observations of radio astronomical sources at the 40GHz and 80GHz bands. For supporting material, PET(polyethylene terephthalate: 200×220mm large, 12mgrm thick, permittivity 3.0) was used, and copper was used for the conducting array. The measured characteristics were in good agreement with the calculated ones. The fabricated FSS has low insertion losses of less than 0.2dB and little distortion of polarization for each band. The characteristics of the developed FSS satisfy radio astronomical requirements.
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