Premium
Fields of an electric line source parallel to an inhomogeneous dielectric layer with critical‐coupling regions
Author(s) -
Bahar E.,
Govindarajan G.,
Agrawal B. S.
Publication year - 1975
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs010i002p00197
Subject(s) - wkb approximation , electric field , slab , line source , physics , surface wave , dielectric , electrical impedance , transverse plane , computational physics , quantum electrodynamics , optics , condensed matter physics , quantum mechanics , structural engineering , geophysics , engineering
A characteristic surface impedance for an inhomogeneous dielectric slab that critically couples forward and backward travelling waves is computed using a generalized WKB method. The characteristic surface impedance, which is the tangential electric to magnetic field ratio at the surface of the slab, is a function of the transverse wave number. Using this expression for the characteristic surface impedance, the electric field excited by an electric line source parallel to the slab is derived. This solution is shown to be in good agreement with one derived from a rigorous analytical solution of the wave equation for the near, intermediate, and far‐field regions.