Extremely compact ultra-wideband power divider using hybrid slotline/microstrip-line transition

A novel extremely compact ultra-wideband (UWB) power divider using hybrid slotline/microstrip-line transition is proposed, designed, and implemented. The even- and odd-mode equivalent-circuit method is applied to the proposed power divider. Measured results show that excellent impedance matching at the input/output ports, amplitude and phase balance, and the isolation between the two output ports are observed within the UWB band. The UWB power divider has a simple structure and good performance.