Naslov
Green's functions for planar soft and hard surfaces derived by asymptotic boundary conditions

Autori
Šipuš, Zvonimir ; Merkel, Harald ; Kildal, Per-Simon

Izvornik
IEE proceedings-Microwaves, antennas & propagation (1350-2417) 144 (1997), 5; 321-328

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Green's functions; Asymptotic boundary conditions; Soft and hard surfaces; Strip-loaded slab

Sažetak
We develop the Green's functions for different realizations of planar soft and hard surfaces by using the asymptotic boundary conditions and the spectral domain approach. The considered geometries are the ideal PEC/PMC strip surface, the strip-loaded grounded dielectric slab and the corrugated surface. In all cases the strips and corrugations are straight. The asymptotic boundary conditions are valid in the limiting sense, when the period of the strips or corrugations approaches zero. The developed Green's functions have poles corresponding to surface waves. These are of three types: an ordinary surface wave in the grounded dielectric slab propagating radially out from the source, a strip wave propagating along the strips of the strip-loaded dielectric slab and also along the strips of the PEC/PMC strip surface, and surface waves occurring due to the corrugated surface. The fulfillments of both the soft and hard boundary conditions are discussed in both the near and far field regions. The strip wave of the strip-loaded dielectric slab prevents the boundary conditions in the near-field from being fulfilled, and is thus undesired. The other two surface waves are needed in order to realize the hard boundary condition. This paper is done while Zvonimir Sipus was a Ph.D. Student at Chalmers University of Technology, Gothenburg, Sweden

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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