Traditional Frequency Selective Surface versus Substrate Integrated Waveguide Frequency Selective Surface

This paper is devoted to analysis design and fabrication of both traditional and substrate integrated waveguide (SIW) frequency selective surfaces (FSS) of square elements and square lattice. The transmission loss is studied for different angle of incidence; normal, thirty, forty five and sixty degrees. Moreover the common band for different angle of incidence is determined. The FSS is fabricated on Rogers RO4350 (lossy) of relative permittivity 3.33, thickness 1.524mm and loss tangent 0.004. The arrays provide different resonance due to different current modes. It is simulated using CST MWS and measured using the network analyzer. There is a good agreement between the transmission loss of both the simulated and measured results.