Directional filters on coupled nonuniform TEM transmission lines

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.