A new UWB coupled transmission line power divider

A new ultra wideband (UWB) power divider is proposed in this paper. A design of the power divider is based on coupled transmission lines and it has been implemented using low temperature cofired ceramic (LTCC) technology. The power divider provides a function over the whole UWB bandwidth (3.1-10.6GHz). In contrary to commonly used coupled line splitters, the design doesn´t requires infinite increasing of the even-mode coupled line impedance in order to achieve bandwidth as wider as possible. Optimal values of the even- odd-mode impedances are required for the ultra wideband function that results in optimized coupling coefficient and contributes to smaller size of the component. A test structure of the power divider has been produced and evaluated. Measurements show low insertion loss of less than 1dB with a good matching over the simulated bandwidth.