Notice of Violation of IEEE Publication Principles: The tri-band filter design based on SIR

Notice of Violation of IEEE Publication Principles

"The Tri-band Filter Design Based on SIR"
by Xinhua Yang, Lujia Dai, Renwei Zhou
in the Proceedings of the International Conference on Audio, Language and Image Processing (ICALIP), July 2008, pp. 211-214

After careful and considered review of the content and authorship of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE's Publication Principles.

This paper copies original text and figures from the papers cited below. The original content was copied without attribution (including appropriate references to the original author(s) and/or paper title) and without permission.

"Advanced Triple-band Bandpass Filter Using Tri-section SIR"
by Qing Xin Chu and Xue Ming Lin
in Electronic Letters, Vol 44, No 4, February 2008, pp. 295-296

"Design of Triple-band Bandpass Filter Using Tri-section Stepped-Impedance Resonators"
by Xue Ming Lin and Qing Xin Chu
in the Proceedings of the International Conference on Microwave and Millimeter Wave Technology, (ICMMT), April 2007


On the basis of tri-section stepped-impedance resonator (SIR), a novel triple-band bandpass filter (BPF) is presented, which has a triple-band feature of three passbands at desired frequencies and high out-of-band suppression. The new coupling scheme can improve the performance of the BPF of the input and output, and the hairpin structure helps reduce the size. A microstrip filter was designed and simulated, and proved the feasibility of design concept in an excellent way with insertion loss of 2.0, 1.9 and 1.7 dB at 1.0, 2.4, 3.6 GHz, respectively.