Title :
A modified Chebyshev bandpass filter with attenuation poles in the stopband
Author :
Lim, Jeong-Soo ; Park, Dong Chul
Author_Institution :
Agency for Defense Dev., Taejon, South Korea
fDate :
6/1/1997 12:00:00 AM
Abstract :
This paper describes a design method of a modified Chebyshev bandpass filter with attenuation poles in the stopband. The insertion of attenuation poles into resonators in the authors´ bandpass-filter design is accomplished by connecting a lumped inductor or capacitor in series with a shunt-type coaxial transmission-line resonator. The inserted poles which are distributed over the stopband can be chosen such that the insertion loss of the filter has equiripple characteristic and maximum attenuation in the stopband with the given number of attenuation poles. The modified Chebyshev bandpass filter designed by this method can be effectively used in diplexer design
Keywords :
Chebyshev filters; UHF filters; band-pass filters; equivalent circuits; linear network synthesis; passive filters; poles and zeros; resonator filters; attenuation poles; design method; diplexer design; equiripple characteristic; insertion loss; modified Chebyshev bandpass filter; shunt-type coaxial transmission-line resonator; stopband inserted poles; Attenuation; Band pass filters; Capacitors; Chebyshev approximation; Coaxial components; Design methodology; Inductors; Insertion loss; Joining processes; Transmission lines;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
