A Plane Wave Expansion Solution for the Scattering from a Frequency-Selective Surface in the Presence of a Dielectric.
ROYAL SIGNALS AND RADAR ESTABLISHMENT MALVERN (ENGLAND)
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The scattering of a plane wave from a periodic broken-wire grid buried in a dielectric sheet is studied for a general angle of incidence and for arbitrary linear polarisation. The scattered field is expanded in a set of Floquet modes, and the modal coefficients are obtained through the current expansion for a reflecting antenna. The general formulation of the problem is applicable for grids in an infinite dielectric and when located at the boundary interface of two dielectrics. A moment method is used to determine the current on the grid elements and numerical results for the transmission characteristics of several different grid congigurations are presented. In addition, the effect on the resonant frequency of parametric variations in the grid geometry is determined. Predicted results are compared with measured transmission characteristics and show excellent agreement.
- *FREQUENCY RESPONSE
- *ELECTRIC WIRE
- *PLANE WAVES
- SURFACE PROPERTIES
- RESONANT FREQUENCY
- ELECTROMAGNETIC SCATTERING
- ANGLE OF INCIDENCE
- UNITED KINGDOM
- Electrical and Electronic Equipment
- Radiofrequency Wave Propagation