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 IdB with a good matching over the simulated bandwidth.