Novel super-compact (λ_g/13 by λ_g/13) left-handed (LH) unit cell ForeS, based on grounded spirals, is analyzed in detail. ForeS exhibits low insertion losses and a large design flexibility: small changes of its inner dimensions, result in resonant frequency tuning range approximately equal to 67%. In the same time, the second harmonic is positioned at more then four times the first resonant frequency. By placing the diodes at the relevant positions, ForeS can be made electronically reconfigurable: 27% resonant frequency tuning range can be achieved, as well as different in- and out-of-band performances. Two LH transmission lines are designed using ForeS that offer a trade-off between LH bandwidth and pass band ripple. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2561–2567, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22739

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Volume49, Issue10

October 2007

Pages 2561-2567

Novel left-handed transmission lines based on grounded spirals

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Novel left-handed transmission lines based on grounded spirals

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