Abstract
AbstractWe 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 (f0), whereas the MGC filter has transmission zeros at two finite frequencies (f01 and f02). The second transmission zero at f02 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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