A Synthetic Design Approach of Wideband Bandpass Power Divider

Prototypes of three categories filtering bandpass power dividers are presented in this letter. Their common points are M-sections cascaded transformer structure and M + 1 sections shorted stubs. To realize different performance, three specific structures are adopted in these categories' prototypes of power divider. Specifically, three different performances of proposed three prototypes are perfect isolation in the passband, smaller circuit size and out-of-band rejection, respectively. Three proposed prototypes are analysis by even- and odd-mode method, and the binding relationship in mathematics are deduced. Finally, three experimental circuits of corresponding prototypes are fabricated, and high consistency exist in the measured results and simulated results.