Title :
3D Directive Radiation from a Horizontal Dipole Embedded in a Homogenized Grounded Wire-Medium Slab
Author :
Burghignoli, Paolo ; Lovat, Giampiero ; Capolino, Filippo ; Jackson, David R. ; Wilton, Donald R.
Author_Institution :
Dept. of Electron. Eng., La Sapienza Rome Univ.
Abstract :
The radiation features of an elemental electric dipole source embedded inside a grounded wire-medium slab are investigated. A homogenous model is adopted which takes into account both anisotropy and spatial dispersion of the metamaterial medium in the long wavelength limit. An equivalent transverse network is derived for plane waves TE and TM with respect to the wires´ axis, coupled by a four-port network associated with the air-slab interface, and the far-field pattern is then derived via the reciprocity theorem. Numerical results are provided which show the possibility of achieving a narrow azimuthally symmetric pencil beam at broadside by properly choosing the physical and geometrical parameters of the structure. MoM results for the wire medium, not shown in this summary, confirm the phenomenology observed with the homogenous model
Keywords :
dipole antennas; dispersion (wave); metamaterials; method of moments; slabs; 3D directive radiation; MoM; air-slab interface; elemental electric dipole source; equivalent transverse network; far-field pattern; four-port network; homogenized grounded wire-medium slab; horizontal dipole; metamaterial medium; method of moments; narrow azimuthally symmetric pencil beam; plane waves; reciprocity theorem; spatial dispersion; Anisotropic magnetoresistance; Metamaterials; Permittivity; Photonic band gap; Plasma materials processing; Plasma sources; Plasma waves; Slabs; Tellurium; Wire;
Conference_Titel :
Antennas and Propagation Society International Symposium 2006, IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
1-4244-0123-2
DOI :
10.1109/APS.2006.1711236