A low-pass filter consisted of one inner-connected coupled-line and two open-stub transmission lines possessed quasi-elliptic frequency response and wide rejection bandwidth is proposed. The analysis is based on transmission line and coupled-line circuit model. Two-port impedance matrices and a T-type equivalent circuit were derived. On the basis of this equivalent circuit, a circuit with 3 dB cutoff frequency at 2.45 GHz were designed, simulated, and measured. The simulated and measured results are in good agreement within 0–12 GHz. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 612–615, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22199

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Volume49, Issue3

March 2007

Pages 612-615

RETRACTED: Reduced-sized single coupled-line low-pass filter

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Retraction: “Reduced-sized single coupled line low-pass filter,” by J. D. Tseng and P. S. Chen

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RETRACTED: Reduced-sized single coupled-line low-pass filter

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