Frequency reconfigurable Unequal power divider with continuously broad tuning bandwidth

A frequency reconfigurable Unequal Wilkinson power divider is proposed. The divider's operating frequency can be reconfigured within a wide band. Reconfiguration is achieved because of two simple π-shaped circuits with varactors, which are inserted into the two impedance transformers of a conventional unequal Wilkinson power divider. Equivalent impedance of the two transformers are nearly unchanged while their phases are reconfigured by varying the varactors' biasing voltages. Operating frequency is changed continuously by tuning varactors' biasing voltages. Simulation results show that tuning bandwidth is over 73% regarding to the lowest operating frequency. Other preferred properties, such as good matching, small insertion loss, and miniaturized size are also achieved.