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A modified generalized Chebyshev low-pass filter with wide stopband

✍ Scribed by Inseon Kim; Kwisoo Kim; Jongsik Lim; Dal Ahn

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
332 KB
Volume
51
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

We developed a modified generalized Chebyshev (MGC) rational function and synthesized a low‐pass filter (LPF) to implement it. The conventional generalized Chebyshev (GC) filter and proposed MGC filter have an equal ripple in passband. However, in stopband, the GC filter has only one transmission zero (or attenuation pole) at a finite frequency (f~0~), whereas the MGC filter has transmission zeros at two finite frequencies (f~01~ and f~02~). The second transmission zero at f~02~ can suppress harmonics (or spurious responses). We designed and fabricated a low‐pass filter according to the proposed theory. The stopband of the MGC filter was 4.7 times wider than that of the GC filter. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1428–1431, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24389

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