Surface-Wave Launchers for Beam Steering and Application to Planar Leaky-Wave Antennas

被引：62
作者：
Podilchak, Symon K. [1 ,2 ]
Freundorfer, Al P. [1 ,2 ]
Antar, Yahia M. M. [1 ,2 ]
机构：
[1] Royal Mil Coll Canada, Dept Elect Engn, Kingston, ON K7K 7B4, Canada
[2] Queens Univ, Kingston, ON K7L 3N6, Canada
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2009年 / 57卷 / 02期
关键词：
Leaky-wave (LW); leaky-wave antenna (LWA); surface-wave (SW); surface-wave launcher (SWL); RADIATION; ARRAYS;
D O I：
10.1109/TAP.2008.2011248
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：
A linear array of surface-wave launchers (SWLs) is presented for surface-wave (SW) beam steering on a grounded dielectric slab (GDS). Specifically, a two-element array of directive Yagi-Uda like SWL antennas (operating between 21-24 GHz) is investigated. By varying the relative phase difference between SWL elements, the excited SW field distribution can be steered. In addition, a six-element linear array of SWLs with nonuniform weighting is also presented. If metallic gratings are placed on top of the GDS, the bound SW mode can be transformed into a radiated leaky-wave (LW) mode and directive beam patterns can be generated in the far field. A specific elliptical grating configuration is also investigated demonstrating single frequency cylindrical-sector LW beam steering. These slotted SWL arrays can be useful for novel SW beam scanning designs, millimeter wave power distribution systems and new LW antennas.
引用
收藏
页码：355 / 363
页数：9
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