Propagation and Field Excitation in Metal-Strip Grating Waveguides: Homogeneous Model and Full-Wave Analysis

被引:4
作者
Lovat, Giampiero [1 ]
Burghignoli, Paolo [1 ]
机构
[1] Univ Roma La Sapienza, Dept Elect Engn, I-00184 Rome, Italy
来源
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2009年 / 8卷
关键词
Homogenization; periodic waveguides; GREENS-FUNCTIONS; INTERFACE;
D O I
10.1109/LAWP.2009.2024558
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
Partially filled parallel-plate waveguides (PPWs) loaded with parallel metal strips arranged periodically [i.e., metal strip gratings (MSGs)] are studied by means of both an approximate homogeneous model and a rigorous full-wave analysis. Bloch modes supported by the waveguide are first considered in different propagation regimes. Full-wave results for the fields excited by an electric line source are also obtained via the array scanning method (ASM) so that the limits of validity of classical homogeneous models (based on a transverse network representation of the structure) can be assessed in the presence of finite sources and for observation and source points close to the actual periodic metallic loading.
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页码:708 / 711
页数:4
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