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664 GHz dual polarisation frequency selective surface

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7 Author(s)
Dickie, R. ; Inst. of Electron., Commun. & Inf. Technol. (ECIT), Queen's Univ. Belfast, Belfast, UK ; Cahill, R. ; Mitchell, N. ; Gamble, H.
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The design, manufacture and performance of a frequency selective surface (FSS) which is required to operate simultaneously in the TE and TM planes at 45?? incidence over the frequency range 173 - 671 GHz is presented. The FSS was designed to allow transmission of radiation over a 2% bandwidth centred at 664 GHz and reflect four channels centred at 448, 325, 243 and 183 GHz with a loss < 0.5 dB. The filter was formed from silicon on insulator material which was precision micromachined with an array of Jerusalem cross-slots and encapsulated with high conductivity silver. Experimental results yielded virtually identical spectral responses in the two polarisation planes with the electromagnetic performance exceeding the above specifications.

Published in:

Electronics Letters  (Volume:46 ,  Issue: 7 )