Title :
A Correction to Head-Wave Fields for a Simple Planar Contrast of Permittivity
Author_Institution :
Global Commun. Technol. (GCT) Res., Inc., Seoul, South Korea
fDate :
6/1/2010 12:00:00 AM
Abstract :
When asymptotically describing the wave fields on the denser side of a planar permittivity interface, the canonical head-wave fields of the tangential-magnetic (TM) set show discrepancies with the full-wave fields. This paper derives the correction fields that supplement the canonical TM head-wave fields, by taking into account the proximity between the head-wave branch point and an extraneous pole in the wavenumber domain. The validity of the correction is demonstrated in the time domain by comparing the waveforms of a corrected field and the full-wave field, for various ratios of permittivity and at various locations of observation. Consideration is also given to the case of a conducting medium.
Keywords :
electromagnetic wave propagation; permittivity; TM head-wave fields; electromagnetic radiation; electromagnetic transient propagation; planar permittivity; simple planar contrast; wavenumber domain; Communications technology; Dielectrics; Electromagnetic propagation; Electromagnetic radiation; Electromagnetic reflection; Global communication; Magnetic domains; Magnetic heads; Permeability; Permittivity; Poles and zeros; Probes; Tellurium; Approximation methods; dielectric interfaces; electromagnetic radiation; electromagnetic transient propagation; half space;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2010.2046845