Extended dual composite right/left-handed transmission line

A planar‐balanced extended dual composite right/left handed (E‐DCRLH) transmission line with dual left‐handed and dual right‐handed passbands is presented.The balanced E‐DCRLH transmission line shows LH‐RH‐notched‐LH‐RH band characteristics. The required series parallel resonance tank and shunt series resonance tank are provided by interdigital capacitor with closed stub and stub with rectangular patch, respectively. The series capacitor and the shunt inductance are provided by another interdigital capacitor and stub with metallic via hole, respectively. The dispersion relation and frequency response of E‐DCRLH TL are analyzed by circuit analysis, Bloch‐Floquet theory, and full wave simulation. Demonstrations of E‐DCRLH TL are designed, fabricated and measured. The measurements are in agreement with simulation and theory. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2838–2840, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25615