Title :
Synthesis and Design of High-Selectivity Wideband Quasi-Elliptic Bandpass Filters Using Multiconductor Transmission Lines
Author :
Sanchez-Martinez, Juan Jose ; Marquez-Segura, Enrique ; Lucyszyn, Stepan
Author_Institution :
Dept. de Ing. de Comun., Univ. de Malaga, Malaga, Spain
Abstract :
A comprehensive study of high-selectivity filters that employ series multiconductor transmission lines (MTLs) and a shunt MTL is presented. It is shown that this topology is suitable for implementing three- and five-pole bandpass filters having a quasi-elliptic frequency response. An exact synthesis procedure with analytical design equations for achieving equal-ripple passband response as a function of the operating bandwidth is described. To validate the theory, several bandpass filters are designed, fabricated, and measured. The excellent agreement between the measurements and the predicted results validates the proposed procedure as a reliable and quick technique for designing wideband quasi-elliptic bandpass filters.
Keywords :
Butterworth filters; Chebyshev filters; band-pass filters; elliptic filters; frequency response; multiconductor transmission lines; analytical design equations; equal-ripple passband response; high-selectivity wideband quasielliptic band-pass filters; multiconductor transmission lines; operating bandwidth function; quasielliptic frequency response; shunt MTL; synthesis procedure; third-order Butterworth responses; third-order Chebyshev responses; three-and-five-pole bandpass filters; Chebyshev approximation; Equations; Filtering theory; Impedance; Mathematical model; Passband; Wideband; Bandpass filter; Butterworth response; Chebyshev response; coupled lines; multiconductor transmission lines (MTLs); quasi-elliptic response; wideband;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2014.2375323
