期刊
IET MICROWAVES ANTENNAS & PROPAGATION
卷 3, 期 8, 页码 1262-1270出版社
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-map.2008.0313
关键词
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资金
- Spanish government [TEC2006-13248-C04-04]
- Madrid Regional government [CCG06UC3M/TIC-0803]
This work investigates the use of a lattice comprising split ring resonators (SRRs) as a negative permeability medium to achieve backward travelling modes within a rectangular waveguide. The loadings of such SRR-type periodic structures into a waveguide can be tailored such that the backward mode exists in a passband below the ordinary basic modal cutoff frequency, thus affording filtering capabilities and miniaturisation. Theoretical studies by two approaches are performed here, a moment method spectral domain analysis, and a commercial simulation tool. Parametric studies that characterise the effects of various dimensional and electrical properties on the dispersion behaviour of the SRR-loaded waveguide shall also be conducted. The SRR parameters are then optimised using the ant colony optimisation (ACO) algorithm to achieve a low backward passband, for a high degree of miniaturisation and isolation. Experimental results of measurements performed on a manufactured prototype of the optimised SRR-loaded waveguide will also be presented.
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