Accession Number : AD0478431


Title :   GROUP VELOCITY AND POWER FLOW RELATIONS FOR SURFACE WAVES IN PLANE-STRATIFIED ANISOTROPIC MEDIA


Descriptive Note : Research rept.


Corporate Author : POLYTECHNIC INST OF BROOKLYN NY MICROWAVE RESEARCH INST


Personal Author(s) : Bertoni, H L ; Hessel, A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/478431.pdf


Report Date : 04 Oct 1965


Pagination or Media Count : 30


Abstract : Two aspects of power flow associated with electromagnetic waves in plane-stratified, dispersive, anisotropic media that are also lossless and linear are considered. One aspect is the relation between group velocity and the velocity of energy transport of surface waves in such media. It is shown that the group velocity of surface wave is equal to the ratio of the real part of the complex Poynting vector, integrated over the coordinate of stratification, to the corresponding integral of the stored energy density. The second aspect is the relation between the dyadic surface impedance representing either a slab of plane-stratified medium above a perfectly conducting plane or a semi-infinite region, the latter for the case of evanescent fields, and the power flow in the respective structures. The significance of the surface impedance and power relations for surface waves is discussed.


Descriptors :   *ANISOTROPY , *ELECTROMAGNETIC RADIATION , ELECTRICAL IMPEDANCE , ENERGY , EQUATIONS , MATHEMATICAL ANALYSIS , POWER , PROPAGATION , SURFACE PROPERTIES , THEORY , VELOCITY , WAVE PROPAGATION


Subject Categories : Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE