Design and analysis of compact unequal-split Wilkinson power divider using non-uniform transmission lines

In this paper, the design of miniaturized unequal-split Wilkinson power divider (WPD), with 1:2 split ratio, using non-uniform transmission lines (NTLs) is presented. To achieve compactness, the uniform transmission lines of the conventional WPD are substituted by their equivalent NTLs. Two extra compact NTLs transformers are incorporated in each arm of the divider for output ports matching purposes. To prove the validity of the design procedure, the proposed divider is simulated using full-wave simulators, fabricated and tested. Both simulation and measurement results are in good agreement. Using NTLs, a size reduction of 22.2% is achieved, besides odd harmonics suppression.