Electromagnetic Fields of Hertzian Dipoles in Layered Negative Refractive Index Materials

Author

Bagley, J. Quinn ; Wu, Boping ; Tsang, Leung

Author_Institution

Dept. of Electr. Eng., Univ. of Washington-Seattle, Seattle, WA

Volume

7

fYear

2008

fDate

6/30/1905 12:00:00 AM

Firstpage

749

Lastpage

752

Abstract

The electromagnetic fields of a Hertzian dipole in layered negative refractive index material (NIM) are efficiently calculated using the fast all modes method (FAM) combined with the numerical modified steepest-descent path method (NMSP). The exact locations of all surface wave modes and all leaky wave modes are found for various NIM slab thicknesses. Both lossless and lossy cases are studied. It is observed that there are different types of surface wave modes or even no surface wave mode at certain slab thicknesses. The electromagnetic fields vary significantly when modes are excited or disappear at certain thicknesses.

Keywords

Green´s function methods; inhomogeneous media; leaky wave antennas; metamaterials; refractive index; Hertzian dipoles; electromagnetic fields; fast all modes method; layered media Green functions; layered negative refractive index materials; leaky wave modes; metamaterials; numerical modified steepest-descent path method; surface wave modes; Fast all modes method (FAM); layered media Green´s functions; leaky wave modes; metamaterials; negative refractive index material (NIM); surface wave modes;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2008.2008031

Filename

4663513