Miniaturized Frequency Controllable Band-Stop Filter Using Coupled-Line Stub-Loaded Shorted SIR for Tri-Band Application


Journal Article

© 2001-2012 IEEE. Based on the coupled-line stub-loaded shorted stepped-impedance resonator (CLSLSSIR), a compact microstrip tri-band band-stop filter (TB-BSF) with controllable frequencies, stopband attenuations (SAs), and sharp transition band roll-off skirts has been presented. The proposed CLSLSSIR exhibits multimode resonant behavior and is employed to achieve tri-stopband application by applying the virtual ground effect at the attaching position. Due to the infinite input impedance effect of CLSLSSIR, as well as the resonance of π-type network combined with two loaded CLSLSSIRs and transmission line, multiple transmission poles can be yielded to obtain high selectivity of transition band. Finally, an example TB-BSF operating at 1.57, 2.4, and 3.5 GHz with respective SAs of 18, 26.5, and 33.2 dB has been designed and fabricated.

Full Text

Duke Authors

Cited Authors

  • Ai, J; Zhang, YH; Xu, KD; Shen, MK; Joines, WT

Published Date

  • July 1, 2017

Published In

Volume / Issue

  • 27 / 7

Start / End Page

  • 627 - 629

International Standard Serial Number (ISSN)

  • 1531-1309

Digital Object Identifier (DOI)

  • 10.1109/LMWC.2017.2711532

Citation Source

  • Scopus