Title :
Realization of Impedance Boundary
Author :
Lindell, Ismo V. ; Sihvola, Ari H.
Author_Institution :
Electromagn. Lab., Helsinki Univ. of Technol., Espoo
Abstract :
Impedance boundary is generally considered as an approximate model for material interfaces. Considering an electromagnetic field in a certain wave-guiding anisotropic material it is shown that a slab of such a material backed by a perfect electric conductor (PEC) plane can be exactly represented by impedance-boundary conditions. As a result of the analysis, a novel explicit relation is derived between the surface admittance dyadic of the impedance boundary and the material and geometric parameters of the anisotropic slab which can be used to realize a given admittance dyadic. The relation is verified with results known for the perfect electromagnetic (PEMC) boundary and bi-axial material, considered as special cases of the theory
Keywords :
anisotropic media; boundary-value problems; conducting bodies; electric admittance; electromagnetic fields; surface impedance; IBC; PEC plane; PEMC boundary; anisotropic slab; biaxial material; electromagnetic field; geometric parameter; impedance boundary condition; material interfaces; perfect electric conductor; perfect electromagnetic; surface admittance dyadic; wave-guiding anisotropic material; Admittance; Anisotropic magnetoresistance; Conducting materials; Corrugated surfaces; Electromagnetic fields; Magnetic materials; Slabs; Surface impedance; Surface treatment; Two dimensional displays; Boundary conditions; electromagnetics; impedance boundary;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2006.886535
