Premium
A compact UWB bandpass filter using a center‐tapped composite right/left‐handed transmission‐line zeroth‐order resonator
Author(s) -
Ju J.,
Kahng S.
Publication year - 2011
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.26170
Subject(s) - band pass filter , stopband , resonator , insertion loss , return loss , center frequency , bandwidth (computing) , transmission line , acoustics , filter (signal processing) , group delay and phase delay , microstrip , electronic engineering , physics , engineering , optics , electrical engineering , telecommunications , antenna (radio)
The design of a new UWB bandpass filter is proposed, which has a center tapped microstrip composite right/left‐handed transmission‐line zeroth‐order resonator (CRLH‐TL ZOR). In an attempt to reduce the size, instead of the conventional periodic CRLH‐TL, only one cell ZOR geometry is adopted and optimized to have the target UWB bandpass filtering. Along with this subwavelength filter, the matching parts working as a stepped impedance low‐pass filter are suggested for good matching and stopband enhancement. The proposed filter is shown to have the overall size of “0.69λ g × 0.73λ g ,” the fractional bandwidth over 100%, the insertion loss much less than 1 dB, and the flat group delay with an acceptable return loss performance in the predicted and measured results. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26170