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A Modified Generalized Chebyshev LPF Design with Improved Stopband  

Kim In-Seon (Agency for Defense Development)
Kim Kwang-Soo (Daegu Gyeongbuk Institute of Science & Technology)
Lim Jong-Sik (Division of Information Technology Engineering, Soonchunhyang University)
Ahn Dal (Division of Information Technology Engineering, Soonchunhyang University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.16, no.11, 2005 , pp. 1155-1163 More about this Journal
Abstract
In this paper, we suggest the new method to considerably enlarge stopband without increment of filter sire and loss. The proposed low pass filter looks like outward configuration with the published Modified Generalized Chebyshev (MGC) low pass filter, but the element values completely differ from each other. The published MGC fille, had been considered only the second attenuation pole to reject(or suppress) the harmonic, whereas the stopband of the proposed filter is superior to the published MGC filter because not only the second attenuation pole but also the third harmonic of the first attenuation pole is made use of profitably. We fabricate a low pass filter according to the proposed theory. From the measurement of the fabricated filter, we can confirm that the stopband of the proposed filter is reached above 4 times wider than the conventional Generalized Chebyshev(GC) filter and above 1.7 times wider than the published MGC filter.
Keywords
Modified Generalized Chebyshev(MGC) Filter; Generalized Chebyshev(GC) filter; The Harmonic of Attenuation Pole;
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