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Broadband left‐handed rectangular waveguide using a shorted stub and twisted E‐plane posts
Author(s) -
Kim DongJin,
Lee JeongHae
Publication year - 2013
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.27419
Subject(s) - stub (electronics) , broadband , microwave , fractional bandwidth , electrical impedance , stopband , anisotropy , cutoff frequency , transmission line , electrical engineering , materials science , engineering , optics , physics , telecommunications , band pass filter
A broadband left‐handed (LH) waveguide operating above the cutoff frequency is presented. The unit cell consists of one‐shorted stub and two‐twisted posts. The structure induces double loops in the surface currents, resulting in enhanced inductance which broadens the negative permeability region. To analyze the LH properties of the structure, a 2‐port network cross‐connected equivalent circuit is derived. The measured results of the LH waveguide constructed with five unit cells in an X‐band are in good agreement with simulated data and show a good transmission property as well as a broad LH fractional bandwidth of 26.5%. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:835–840, 2013; View this article online at wileyonlinelibrary.com. DOI: 10.1002/mop.27419