Active frequency-selective surfaces

T.K. Chang; R.J. Langley; E.A. Parker

Active frequency-selective surfaces

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Active frequency-selective surfaces

Author(s): T.K. Chang ; R.J. Langley ; E.A. Parker
DOI: 10.1049/ip-map:19960115

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Author(s): T.K. Chang ¹ ; R.J. Langley ¹ ; E.A. Parker ¹
- Affiliations: 1: Electronic Engineering Laboratories, University of Kent, Canterbury, United Kingdom
Source: Volume 143, Issue 1, February 1996, p. 62 – 66
DOI: 10.1049/ip-map:19960115 , Print ISSN 1350-2417, Online ISSN 1359-706X

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Two different varieties of active frequency-selective surfaces (FSS) are described. In one type, active FSS elements incorporating switched PIN diodes are discussed. Waveguide simulation studies show that the frequency response of the surface can be electronically switched from that of a reflecting structure to a transmitting structure. In the other type, FSS are printed on ferrite substrates which are biased with a DC magnetic field. The application of this bias field to the ferrite allows tuning of the resonant frequency by several gigahertz. In addition, the frequency characteristics can be switched from transmitting to reflecting, as for the active element FSS.

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