Title :
Directional filters on coupled nonuniform TEM transmission lines
Author :
Beljaev, Alexander V. ; Krenitskiy, Alexander P. ; Meschanov, Valery P. ; Shikova, Ludmila V.
Author_Institution :
Central Inst. of Meas. Equip., Saratov, Russia
Abstract :
The problems of synthesizing harmonic filters on coupled nonuniform TEM transmission lines have been solved. Two formulations of the synthesis problems with the application of Chebyshev approximation criterion over the passband have been considered. In the first formulation, the coupling region length was fixed, while in the second one, it was included into the varied parameters. Experimental investigation of the harmonic filter was carried out. A general analysis of the results obtained is also presented.
Keywords :
Chebyshev approximation; coupled transmission lines; directional couplers; microwave filters; waveguide filters; Chebyshev approximation; air filling; amplitude-frequency performance; coupled nonuniform TEM transmission lines; coupling region length; directional coupler; directional filters; four-port microwave device; harmonic filter synthesis problems; optimization; optimum function; Chebyshev approximation; Conductors; Couplings; Distributed parameter circuits; Frequency; Harmonic filters; Passband; Power transmission lines; Transmission line theory; Transmission lines;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2003.821261
