A Novel Planar 180° Out-of-Phase Power Divider for UWB Application

A novel planar out-of-phase (180°) power divider with ultra wideband behavior is presented. The proposed power divider employs a T-junction in output ports combined with a slotline and a microstrip line accompanied by wideband microstrip to slotline transitions in order to achieve an out-of-phase signal division over a large frequency range. With the help of the metal pin connected to the system ground plane, the impedance bandwidth improved from 85% to about 133%. The simulated and measured results show that the proposed power divider has equal power division with high stability of phase, a low insertion loss and good return loss at the three ports across the band 3.1 GHz to more than 10.6 GHz.