Closed Form Reflection Coefficients of Strips on A Grounded Dielectric Slab For Artificially Soft And Hard Surfaces

Ideally soft and hard surfaces can be obtained by transversely and longitudinally oriented conducting strips on a grounded dielectric slab, respectively. The importance of this kind of surfaces in antenna and propagation makes their accurate and simple electromagnetic expressions necessary. In this communication, the expressions are derived by using the low frequency assumption. The results of our expressions are compared numerically with that by Point Matching Method (PMM). We have calculated and discussed the structures used as the soft and hard surfaces, and the bandwidth of the reflection coefficient phase.