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Loss-bandwidth product for frequency selective surfaces

Loss-bandwidth product for frequency selective surfaces

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Measurements of the transmission/frequency responses of slot arrays embedded centrally in dielectric layers of various thicknesses show an inverse relationship between the 6 dB width of the transmission band and passband loss. For εr = 4.6, tan δ = 0.02 the losses exceed 1 dB for bandwidths below about 25%. A computer model identifies absorption in the dielectric as the main source of the loss.


    1. 1)
      • G.L. Matthei , L. Young , E.M.T. Jones . (1976) , Microwave filters, impedance matching networks and coupling structures.
    2. 2)
      • P. Callaghan , E.A. Parker , R.J. Langley . Influence of supporting dielectric substrate on the transmission properties of frequency selective surfaces. IEE Proc. H , 448 - 454
    3. 3)
      • Callaghan, P., Parker, E.A., Langley, R.J.: `Use of passive slot arrays to tune dielectric windows', Proc. Sixth European Electromagnetic Structures Conf., September 1991, Friedrichshafen, p. 15–22.

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