Planar Balanced-to-Unbalanced In-Phase Power Divider With Wideband Filtering Response and Ultra-Wideband Common-Mode Rejection

Out-of-phase balanced-to-unbalanced (B2U) power dividers are popular. However, here we present a new in-phase B2U power divider, which is rarely considered. The presented power divider realizes ultrawideband common-mode suppression, while two additional transmission zeros are added around the edges of the passband, exhibiting wideband filtering response. The circuit schematic is simply composed of coupled/non-coupled lines and stubs. Finally, the simulated design is validated experimentally.