Radial guided 4-way unequal power divider using substrate integrated waveguide with center-fed structure

Radially-guided low-profile equal and unequal power division functions are accomplished by using substrate integrated waveguide (SIW) technology with center feeding structures and additional power/phase-control vias. The controlled positions of guiding posts provides the unequal division ratios and phase variations at each port. At this time, the width of the SIW has been kept the same in spite of the shifted position of guiding posts. The electrical performances including return loss, transmission characteristics and phase variations are discussed through simulation and measured data.