Power Dividers with Stubs and Capacitors

Two types of the structures of miniature two-channel power dividers on single transmission lines are investigated. In the first type structure, each channel of the divider is formed by a single uniform transmission line section with open circuited stubs connected in parallel at different distances from one another. The stub impedances are the same, and their lengths are different. In the structure of the second type, parallel connected capacitors with different capacitances are used instead the stubs. The synthesis problems are solved and optimum parameters are found for the dividers having Chebyshev frequency characteristics. It was found, that the proposed power dividers are characterized by close electrical parameters, small-sized dimensions and more effective use of a substrate area when compared with the known ones. The advantage of the first structure is the uniform technological cycle that does not require the application of lumped capacitors during manufacturing the power divider. The advantage of the second type structure is more effective use of the substrate area.