Polarisation independent bandpass FSS

Author

Dickie, R. ; Cahill, R. ; Gamble, H.S. ; Fusco, V.F. ; Huggard, P.G. ; Moyna, B.P. ; Oldfield, M.L. ; Grant, N. ; de Maagt, Peter

Author_Institution

Queen´´s Univ. Belfast, Belfast

Volume

43

Issue

19

fYear

2007

Firstpage

1013

Lastpage

1015

Abstract

The spectral transmittance of a frequency selective surface (FSS), which consists of two free-standing arrays of short-circuited nested annular slots, is presented. The FSS was designed to provide a minimum of 20 dB isolation between the frequency bands 316.5-325.5 and 349.5-358.5 GHz when the filter operates in the TE and TM planes at 45deg incidence. Experimental results, which are in close agreement with the computed transmission coefficients, show that the maximum insertion loss is 0.9 dB, and the minimum cross-polar discrimination is at least 21 dB in the passbands. The FSS yields virtually identical spectral responses in the two polarisation planes over the frequency range 315-359 GHz.

Keywords

electromagnetic wave polarisation; electromagnetic wave transmission; frequency selective surfaces; loop antennas; slot antenna arrays; submillimetre wave antennas; annular slots; bandpass FSS; cross-polar discrimination; free-standing arrays; frequency selective surface; spectral transmittance; transmission coefficients; virtually identical spectral responses;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:20072170

Filename

4302797