Folded substrate-integrated waveguide out-of-phase power divider

An out-of-phase broad-band substrate-integrated waveguide power divider is proposed. The divider uses a folded substrate-integrated waveguide to split an input signal into a pair of half-mode substrate-integrated waveguides. Due to the field distribution in the folded substrate-integrated waveguide, this power split is out-of-phase. Broadband performance is achieved due to the similar field distributions in the folded and half-mode substrate integrated waveguides. Simulations of an X-band divider confirmed the operational principles of the divider and demonstrated good performance from 8 to 10 GHz.