The microwave response of a square array of “metal capped” holes in a metal sheet is explored both experimentally and numerically. Above each circular aperture are concentrically placed metallic discs, separated by a fraction of the wavelength, with discs having radii larger than the apertures. The volume bound by the overlap supports a family of resonances that mediate transmission with the fundamental resonant mode being a factor of ~2.3 lower in frequency than the bare aperture resonance.

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1. E. C. Ngai, and A. P. Smolski, “Electromagnetic properties of metal space frame radomes for use in satellite communications earth stations,” Antennas and Propag. Society International Symposium, AP-S Digest, 3, 1956–1959, (1993)
2. T. W. Ebbesen, H. J. Lezec, H. F. Ghaemi, T. Thio, and P. A. Wolff, “Extraordinary Optical Transmission through Sub-wavelength Hole Arrays,” Nature 391(6668), 667–669 (1998). [CrossRef]
3. E. A. Parker and S. M. A. Hamdy, “Rings as elements for frequency selective surfaces,” Electron. Lett. 17(17), 612–614 (1981). [CrossRef]
4. E. A. Parker, S. M. A. Hamdy, and R. J. Langley, “Arrays of concentric rings as frequency selective surfaces,” Electron. Lett. 17(23), 880–881 (1981). [CrossRef]
5. E. A. Parker and A. N. A. El Sheikh, “Convolted dipole array elements,” Electron. Lett. 27(4), 322–323 (1991). [CrossRef]
6. R. Mittra, R. Hall, and C.-H. Tsao, “Spectral-domain analysis of circular patch frequency selective surfaces,” IEEE Trans. Antenn. Propag. 32(5), 533–536 (1984). [CrossRef]
7. D. S. Lockyer, J. C. Vardaxoglou, and R. A. Simpkin, “Complementary frequency selective surfaces,” IEEE Trans. Antenn. Propag. 147(6), 501–507 (2000).
8. M. Beruete, R. Marques, J. D. Baena, and M. Sorolla, “Resonace and cross polarisation effects in conventional and complementary split ring resonantors periodic screens” Antenna and Propag. Society International Symposium., 3A, 794–797, (2005)
9. I. Tardy, C. H. Chan, and J. S. Yee, “Analysis of the Yee Frequency Selective Surface” Antenna and Prop. Society International Symposium, AP-S Digest, 1, 196–199, (1991)
10. A. P. Feresidis, G. Apostolopoulos, N. Serfas, and J. C. Vardaxoglou, “Closely coupled metallodielectric electromagnetic band-gap structures formed by double-layer dipole and tripole arrays,” IEEE Trans. Antenn. Propag. 52(5), 1149–1158 (2004). [CrossRef]
11. D. S. Lockyer, C. Moore, R. Seager, R. Simpkin, and J. C. Vardaxoglou, “Coupled dipole arrays as reconfigurable frequency selective surfaces,” Electron. Lett. 30(16), 1258–1259 (1994). [CrossRef]
12. isJ. C. Vardaxoglou and D. Lockyer, “Modified FSS response from two sided and closely coupled arrays,” Electron. Lett. 30(22), 1818–1819 (1994). [CrossRef]
13. R. Pous and D. M. Pozar, “A frequency selective surface using aperture coupled microstrip patches,” IEEE Trans. Antenn. Propag. 39(12), 1763–1769 (1991). [CrossRef]
14. J. Shaker and L. Shafai, “Removing the angular sensitivity of frequency selective surface structures using novel double-layer structures,” IEEE Microw. Guid. Wave Lett. 5(10), 324–325 (1995). [CrossRef]
15. A. P. Hibbins, J. R. Sambles, C. R. Lawrence, and J. R. Brown, “Squeezing millimeter waves into microns,” Phys. Rev. Lett. 92(14), 143904 (2004). [CrossRef] [PubMed]
16. N. Behdad, “A second-order band-pass frequency selective surface using non resonant sub wavelength periodic structures,” Microw. Opt. Technol. Lett. 50(6), 1639–1643 (2008). [CrossRef]
17. M. J. Lockyear, A. P. Hibbins, J. R. Sambles, P. A. Hobson, and C. R. Lawrence, “Thin resonant structures for angle and polarisation independent microwave absorption,” J. Appl. Phys. 94, 041913 (2000).
18. B. A. Munk, Frequency Selective Surfaces Theory and Design, (John Wiley & Sons 2000)
19. Nelco, California, USA.
20. HFSS, Ansoft Corporation, Pittsburgh, PA, USA.

Electron. Lett.

• E. A. Parker and S. M. A. Hamdy, “Rings as elements for frequency selective surfaces,” Electron. Lett. 17(17), 612–614 (1981). [CrossRef]
• E. A. Parker, S. M. A. Hamdy, and R. J. Langley, “Arrays of concentric rings as frequency selective surfaces,” Electron. Lett. 17(23), 880–881 (1981). [CrossRef]
• E. A. Parker and A. N. A. El Sheikh, “Convolted dipole array elements,” Electron. Lett. 27(4), 322–323 (1991). [CrossRef]
• D. S. Lockyer, C. Moore, R. Seager, R. Simpkin, and J. C. Vardaxoglou, “Coupled dipole arrays as reconfigurable frequency selective surfaces,” Electron. Lett. 30(16), 1258–1259 (1994). [CrossRef]
• isJ. C. Vardaxoglou and D. Lockyer, “Modified FSS response from two sided and closely coupled arrays,” Electron. Lett. 30(22), 1818–1819 (1994). [CrossRef]

IEEE Microw. Guid. Wave Lett.

• J. Shaker and L. Shafai, “Removing the angular sensitivity of frequency selective surface structures using novel double-layer structures,” IEEE Microw. Guid. Wave Lett. 5(10), 324–325 (1995). [CrossRef]

IEEE Trans. Antenn. Propag.

• A. P. Feresidis, G. Apostolopoulos, N. Serfas, and J. C. Vardaxoglou, “Closely coupled metallodielectric electromagnetic band-gap structures formed by double-layer dipole and tripole arrays,” IEEE Trans. Antenn. Propag. 52(5), 1149–1158 (2004). [CrossRef]
• R. Pous and D. M. Pozar, “A frequency selective surface using aperture coupled microstrip patches,” IEEE Trans. Antenn. Propag. 39(12), 1763–1769 (1991). [CrossRef]
• R. Mittra, R. Hall, and C.-H. Tsao, “Spectral-domain analysis of circular patch frequency selective surfaces,” IEEE Trans. Antenn. Propag. 32(5), 533–536 (1984). [CrossRef]
• D. S. Lockyer, J. C. Vardaxoglou, and R. A. Simpkin, “Complementary frequency selective surfaces,” IEEE Trans. Antenn. Propag. 147(6), 501–507 (2000).

J. Appl. Phys.

• M. J. Lockyear, A. P. Hibbins, J. R. Sambles, P. A. Hobson, and C. R. Lawrence, “Thin resonant structures for angle and polarisation independent microwave absorption,” J. Appl. Phys. 94, 041913 (2000).

Microw. Opt. Technol. Lett.

• N. Behdad, “A second-order band-pass frequency selective surface using non resonant sub wavelength periodic structures,” Microw. Opt. Technol. Lett. 50(6), 1639–1643 (2008). [CrossRef]

Nature

• T. W. Ebbesen, H. J. Lezec, H. F. Ghaemi, T. Thio, and P. A. Wolff, “Extraordinary Optical Transmission through Sub-wavelength Hole Arrays,” Nature 391(6668), 667–669 (1998). [CrossRef]

Phys. Rev. Lett.

• A. P. Hibbins, J. R. Sambles, C. R. Lawrence, and J. R. Brown, “Squeezing millimeter waves into microns,” Phys. Rev. Lett. 92(14), 143904 (2004). [CrossRef] [PubMed]

Other

• B. A. Munk, Frequency Selective Surfaces Theory and Design, (John Wiley & Sons 2000)
• Nelco, California, USA.
• HFSS, Ansoft Corporation, Pittsburgh, PA, USA.
• E. C. Ngai, and A. P. Smolski, “Electromagnetic properties of metal space frame radomes for use in satellite communications earth stations,” Antennas and Propag. Society International Symposium, AP-S Digest, 3, 1956–1959, (1993)
• M. Beruete, R. Marques, J. D. Baena, and M. Sorolla, “Resonace and cross polarisation effects in conventional and complementary split ring resonantors periodic screens” Antenna and Propag. Society International Symposium., 3A, 794–797, (2005)
• I. Tardy, C. H. Chan, and J. S. Yee, “Analysis of the Yee Frequency Selective Surface” Antenna and Prop. Society International Symposium, AP-S Digest, 1, 196–199, (1991)

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