A design methodology of narrow band-pass frequency selective surfaces (FSSs) using the Fabry-Perot approach is presented. The whole FSS structure consists of two identical single layer FSSs separated by a foam layer, which forms a Fabry-Perot interferometer (FPI). The band-pass characteristic is a result of the FPI. The pass band can be controlled by the thickness of the foam, and the bandwidth can be controlled by the reflection coefficients of the single layer FSSs. The effects of both metallic and dielectric losses are discussed. It is interesting to note that the transmission peaks of FPI with high Q factor decline rapidly and finally disappear as the losses increase, and the insertion loss is mainly due to the refection. The relationship between the insertion loss and the Q factor of the FPI is examined. As examples, narrow band-pass FSSs at about 96 GHz with different bandwidths are designed.
2. Mittra, R., C. H. Chan, and T. Cwik, Techniques for analyzing frequency selective surfaces --- A review, IEEE Proceedings, Vol. 76, 1593-1615, 1988.
3. Wan, C. and J. A. Encinar, "Efficient computation of generalized scattering matrix for analyzing multilayered periodic structures," IEEE Trans. Antennas Propagat., Vol. 43, 1233-1242, 1995.
4. Fadi, S., et al., "Absorbing frequency-selective-surface for the mm-wave range," IEEE Trans. Antennas Propagat., Vol. 56, 2649-2655, 2008.
5. Sha, Y.-N., et al., "Experimental investigations of microwave absorber with FSS embedded in carbon fiber composite," Microw. Opt. Tech. Lett., Vol. 32, 245-249, 2002.
6. Euler, M. and V. Fusco, Sub-millimetre wave linear to circular polariser converter, Loughborough Antennas & Propagation Conference, 77-80, Loughborough, UK, 2008.
7. Yoshihisa, I. and T. Takano, "Frequency selective surfaces for radio astronomy," Experimental Astronomy, Vol. 2, 123-136, 1991.
8. Shelton, D. J., et al., "Gangbuster frequency selective surface metamaterials in terahertz band," Electronics Letters, Vol. 44, 1288-1289, 2008.
9. Pozar, D. M. and R. Pous, A frequency selective surface using aperture coupled microstrip patches, Antennas and Propagation Society International Symposium, Vol. 1, 96-99, 1990.
10. Lockyer, D. S. and J. C. Vardaxoglou, "Reconfigurable FSS response from two layers of slotted dipole arrays," Electronics Letters, Vol. 32, 512-513, 1996.
11. Parker, E. A. and A. Stanley, "Dual-polarized narrow-bandpass frequency-selective surfaces," Microw. Opt. Tech. Lett., Vol. 13, 105-107, 1996.
12. De Lima, A. C. C. and E. A. Parker, Fabry-perot approach to the design of double layer FSS, IEE Proc. --- Microw. Antennas Propag., Vol. 143, 157-162, 1996.
13. Antonopoulos, C. and E. A. Parker, Design procedure for FSS with wide transmission band and rapid rolloff, IEE Proc. --- Microw. Antennas Propag., Vol. 145, 508-510, 1998.
14. Cahill, R., et al., "Frequency selective surfaces for millimetre and submillimetre wave quasi optical demultiplexing," Int. J. of Infrared and Millimeter Waves, Vol. 14, 1769-1788, 1993.
15. Ma, D. and W. S. Zhang, "Mechanically tunable frequency selective surface with square-loop-slot elements," Journal of Electromagnetic Waves and Applications, Vol. 21, No. 15, 2267-2276, 2007.
16. Guo, C., H. Sun, and X. Lu, "A novel dualband frequency selective surface with periodic cell perturbation," Progress In Electromagnetics Research B, Vol. 9, 137-149, 2008.
17. Ucar, M. H. B., A. Sondas, and Y. E. Erdemli, "Switchable split-ring frequency selective surfaces," Progress In Electromagnetics Research B,, Vol. 6, 65-79, 2008.
18. Zhang, J. C., Y. Z. Yin, and J. P. Ma, "Frequency selective surfaces with fractal four legged elements," Progress In Electromagnetics Research L, Vol. 8, 1-8, 2009.
19. Oraizi, H. and M. Afsahi, "Design of metamaterial multilayer structures as frequency selective surfaces," Progress In Electromagnetics Research C, Vol. 6, 115-126, 2009.
20. Farahat, A. E. and K. F. A. Hussein, "Spatial filters for linearly polarized antennas using free standing frequency selective surface," Progress In Electromagnetics Research M, Vol. 2, 167-188, 2008.
21. Zhuang, W., et al., "Fast analysis and design of frequency selective surface using the GMRESR-FFT method," Progress In Electromagnetics Research B, Vol. 12, 63-80, 2009.