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Novel left‐handed transmission lines based on grounded spirals
Author(s) -
Jokanovicé B.,
CrnojevicéBengin V.
Publication year - 2007
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.22739
Subject(s) - wideband , microwave , flexibility (engineering) , engineering , electrical engineering , ripple , diode , bandwidth (computing) , telecommunications , electronic engineering , physics , mathematics , statistics , voltage
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