Design method for ultra-wideband bandpass filter with wide stopband using parallel-coupled microstrip lines

Abbosh, Amin M. (2012) Design method for ultra-wideband bandpass filter with wide stopband using parallel-coupled microstrip lines. IEEE Transactions On Microwave Theory And Techniques, 60 1: 31-38. doi:10.1109/TMTT.2011.2175241


Author Abbosh, Amin M.
Title Design method for ultra-wideband bandpass filter with wide stopband using parallel-coupled microstrip lines
Journal name IEEE Transactions On Microwave Theory And Techniques   Check publisher's open access policy
ISSN 0018-9480
1557-9670
Publication date 2012-01
Year available 2011
Sub-type Article (original research)
DOI 10.1109/TMTT.2011.2175241
Volume 60
Issue 1
Start page 31
End page 38
Total pages 8
Place of publication Piscataway, NJ, United States
Publisher IEEE
Collection year 2012
Language eng
Abstract A method to design microstrip bandpass filters with ultra-wideband (UWB) performance, wide stopband, and practical dimensions is presented. According to the proposed method, three subsections of different lengths and coupling factors are connected to form a stepped-impedance parallel-coupled microstrip structure. A theoretical model is derived and used to find the optimum length and coupling factor for each of those subsections for an UWB passband and suppressed second and third harmonic responses in the stopband. The required performance is realized by generating and proper positioning of three transmission zeros in the upper stopband and three transmission poles in the passband. The derived model shows that the total length of the three-subsection coupled structure is one-third of the effective wavelength at the center of the passband. The theoretical model is used to find the required design values for the whole structure. The presented method is validated by building a bandpass filter that has a passband from 3.1 to 10.6 GHz with less than 1-dB insertion loss and a wide upper stopband that extends up to 28 GHz.
Keyword Bandpass filter
Microstrip filter
Ultra-wideband (UWB) filter
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Date of Publication: 29 November 2011 (online)

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Information Technology and Electrical Engineering Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 21 times in Thomson Reuters Web of Science Article | Citations
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Created: Tue, 03 Jan 2012, 12:30:33 EST by Dr Amin Abbosh on behalf of School of Information Technol and Elec Engineering