Title :
Phase and power flow along printed-circuit tensor impedance surfaces
Author :
Elek, Francis ; Grbic, A.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI, USA
Abstract :
The directions of phase and power flow along printed-circuit tensor impedance surfaces are examined. Such surfaces consist of a subwavelength patterned metallic cladding over a grounded dielectric substrate, with the cladding modelled by an anisotropic tensor sheet impedance/admittance. Using an appropriately rotated coordinate system, simple closed-form expressions for the power flow direction are obtained by calculating the Poynting vector. The direction of power flow is first expressed in terms of the ratio of two normal field components. The ratio is then evaluated by using an eigenvalue equation. The proposed analytical procedure will be useful in synthesizing anisotropic, inhomogeneous printed-circuit tensor impedance surfaces.
Keywords :
cladding techniques; eigenvalues and eigenfunctions; electric admittance; electric impedance; periodic structures; printed circuits; tensors; Poynting vector; anisotropic tensor sheet impedance-admittance; closed-form expressions; dielectric substrate; eigenvalue equation; normal field components; phase flow; power flow direction; printed-circuit tensor impedance surfaces; rotated coordinate system; subwavelength patterned metallic cladding; Antennas; Equations; Impedance; Mathematical model; Surface impedance; Surface waves; Tensile stress; Anisotropic surfaces; Impedance surfaces; Periodic structures; Surface Waves; Tensor Impedance Surfaces;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2014 IEEE
Conference_Location :
Memphis, TN
Print_ISBN :
978-1-4799-3538-3
DOI :
10.1109/APS.2014.6904711
