A dual-band Wilkinson power divider based on open-end slotline

A dual-band Wilkinson power divider (WPD) based on open-end slotline is presented. Compared with conventional dual-band power dividers, only two transmission lines and a longitudinal slot with an isolation resistor are employed, which greatly decrease the complexity and profile of the device. The open-end slotline physically separate even- and odd-mode, as the microstrip on the top layer transmits even-mode signal and the slotline on the bottom layer transmits the other. Then, even- and odd-mode analyses are conducted with an equivalent circuit model to illustrate the physical insight of the proposed design. A WPD prototype operating at 2.4 and 5.8 GHz is designed and fabricated. The fractional bandwidth of two operating band are 66.7% and 20.7% with the reference to -15 dB S-11.