A Compact Dual-Band Filter with Close Passbands using Asymmetric λ/4 Resonator Pairs with Shared Via-Hole Ground

References

• Weng , M. H. , Kao , C. H. and Chang , Y. C. 2010 . A compact dual-band bandpass filter with high band selectivity using cross-coupled asymmetric SIRs for WLANS . Journal of Electromagnetic Waves and Applications , 24 ( No. 2–3 ) : 161 – 168 .
   Web of Science ®Google Scholar
• Gemio , J. , Parron , J. , de Paco , P. , Junkin , G. , Marin , J. and Menéndez , O. 2010 . A split-ring-resonator loaded monopole for triple band applications . Journal of Electromagnetic Waves and Applications , 24 ( No. 2–3 ) : 241 – 250 .
   Google Scholar
• Qin , H. B. , Zhai , Y. W. and Zhao , Y. J. 2010 . Synthesis method for chebyshev dual-band microwave filters . Journal of Electromagnetic Waves and Applications , 24 ( No. 2–3 ) : 307 – 317 .
   Google Scholar
• Liu , Y. , Dou , W. B. and Zhao , Y. J. 2010 . A tri-band bandpass filter realized using tri-mode T-shape branches . Progress In Electromagnetics Research , 105 : 425 – 444 .
   Google Scholar
• Lin , H. J. , Chen , X. Q. , Shi , X. W. , Chen , L. and Li , C. L. 2010 . A dual passband filter using hybrid microstrip open loop resonators and coplanar waveguide slotline resonators . Journal of Electromagnetic Waves and Applications , 24 ( No. 1 ) : 141 – 149 .
   Web of Science ®Google Scholar
• Weng , M.-H. , Wu , H.-W. and Su , Y.-K. 2007 . Compact and low loss dual-band bandpass filter using pseudo-interdigital stepped impedance resonators for WLANs . IEEE Microw. Wireless Compon. Lett. , 17 ( No. 3 ) Mar. : 187 – 189 .
   Web of Science ®Google Scholar
• Chen , F. C. and Chu , Q. X. 2011 . Design of dual-band CT filter with source-load coupling . Journal of Electromagnetic Waves and Applications , 25 ( No. 1 ) : 15 – 22 .
   Google Scholar
• Wu , Y. L. , Liao , C. and Xiong , X.-Z. 2010 . A dual-wideband bandpass filter based on E-shaped microstrip SIR with improved upper-stopband performance . Progress In Electromagnetics Research , 108 : 141 – 153 .
   Web of Science ®Google Scholar
• Kung , C. Y. , Chen , Y. C. , Wu , S. M. , Yang , C. F. and Sun , J. S. 2011 . A novel compact 2.4/5.2GHz dual wideband bandpass filter with deep transmission zero . Journal of Electromagnetic Waves and Applications , 25 ( No. 5–6 ) : 617 – 628 .
   Google Scholar
• Velazquez-Ahumada , M. D. C. , Martel-Villagr , J. , Medina , F. and Mesa , F. 2010 . Application of stub loaded folded stepped impedance resonators to dual band filters . Progress In Electromagnetics Research , 102 : 107 – 124 .
   Web of Science ®Google Scholar
• Yang , R. Y. , Hung , C. Y. and Lin , J. S. 2011 . A dual-band bandpass filter with an enhanced second passband performance using modifiable coupling . Journal of Electromagnetic Waves and Applications , 25 ( No. 2–3 ) : 305 – 314 .
   Google Scholar
• Chang , Y.-C. , Kao , C.-H. , Weng , M.-H. and Yang , R.-Y. 2009 . Design of the compact dual-band bandpass filter with high isolation for GPS/WLAN applications . IEEE Microw. Wireless Compon. Lett. , 19 ( No. 12 ) Dec. : 780 – 782 .
   Google Scholar
• Singh , P. K. , Basu , S. and Wang , Y.-H. 2008 . Miniature dual-band filter using quarter wavelength stepped impedance resonators . IEEE Microw. Wireless Compon. Lett. , 18 ( No. 2 ) Feb. : 88 – 90 .
   Google Scholar
• Wu , B. , Liang , C.-H. , Li , Q. and Qin , P.-Y. 2008 . Novel dual-band filter incorporating defected SIR and microstrip SIR . IEEE Microw. Wireless Compon. Lett. , 18 ( No. 6 ) Jun. : 392 – 394 .
   Google Scholar
• Wu , B. , Liang , C.-H. , Qin , P.-Y. and Li , Q. 2008 . Compact dual-band filter using defected stepped impedance resonator . IEEE Microw. Wireless Compon. Lett. , 18 ( No. 10 ) Oct. : 674 – 676 .
   Web of Science ®Google Scholar
• Lai , X. , Wang , N. , Wu , B. and Liang , C. H. 2010 . Design of dual-band filter based on OLRR and DSIR . Journal of Electromagnetic Waves and Applications , 24 ( No. 2–3 ) : 209 – 218 .
   Web of Science ®Google Scholar
• Zhang , X. Y. , Chen , J.-X. , Xue , Q. and Li , S.-M. 2007 . Dual-band bandpass filters using stub-loaded resonators . IEEE Microw. Wireless Compon. Lett. , 17 ( No. 8 ) Aug. : 583 – 585 .
   Web of Science ®Google Scholar
• Zhang , X. Y. , Chan , C. H. , Xue , Q. and Hu , B.-J. 2010 . Dual-band bandpass filter with controllable bandwidths using two coupling paths . IEEE Microw. Wireless Compon. Lett. , 20 ( No. 11 ) Nov. : 616 – 618 .
   Google Scholar
• Yin , Q. , Wu , L. S. , Zhou , L. and Yin , W. Y. 2010 . Compact dual-band bandpass filter using asymmetrical dual stub-load open-loops . Journal of Electromagnetic Waves and Applications , 24 ( No. 17–18 ) : 2397 – 2406 .
   Web of Science ®Google Scholar