Leaky modes on a grounded wire-medium slab

被引：0

作者：

Burghignoli, Paolo ^{[1
]}

Lovat, Giampiero ^{[1
]}

Capolino, Filippo ^{[2
]}

Jackson, David R. ^{[3
]}

Wilton, Donald R. ^{[3
]}

机构：

[1] Univ Roma La Sapienza, Dept Elect Engn, Rome, Italy

[2] Univ Siena, Dept Informat Engn, Siena, Italy

[3] Univ Houston, Dept Elect & Comp Engn, Houston, TX USA

来源：

2007 IEEE/MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-6 | 2007年

关键词：

anisotropic media; dispersion; leaky modes; metamaterials; spatial dispersion; wire medium;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Leaky modes supported by a grounded wire-medium slab are studied here in detail for the first time. Such leaky modes are responsible for highly-directive radiation when the structure is excited by a dipole source. The analysis is carried out by means of a rigorous full-wave numerical approach based on the method-of-moments and also by using an approximate homogenized model. The use of a homogenized model that properly accounts for anisotropy and spatial dispersion leads to a remarkable and surprising result: the wavenumber of the leaky mode is independent of the azimuth angle of propagation on the surface. This results which has not previously been observed in any other leaky-wave structure, allows for the creation of narrow conical beams that are azimuthally symmetric, as well as symmetric broadside beams. This conclusion is confirmed by the full-wave method-of-moments analysis.

引用

页码：1658 / +

页数：2

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