A New Triple-Band Four-Way Filtering Power Divider With Highly Improved Performance

This letter presents a new triple-band four-way filtering power divider (FPD) with greatly improved frequency selectivity and in-band isolation. By elaborately developing multi-port multi-mode topology between four identical resonators feedlines, FPD is attained. In order to validate the feasibility of proposal, one prototype designed, fabricated, measured. Both simulated measured results designed are provided good agreement. Results indicate that this exhibits not only sharp selective performance, but also satisfactory port-to-port isolations.