Wide band uniplanar 180° out-of-phase power divider

In this paper, we have proposed a novel wideband 180degout-of-phase power divider. By means of using a slot T-conjunction which operates like a waveguide E-T, the frequency independent 180deg out-of-phase characteristic between the two output ports is achieved. The simulated and measured results of the proposed divider show equal power division with high stability of phase, good input return loss within 1.85-3.5 GHz band.