A Radial Multi-Mode Filtering Power Divider for Antenna Array Applications

A symmetric radial filtering power divider is presented herein. The power divider is implemented in a substrate integrated waveguide (SIW) and is designed using filter theory to obtain equal 6-way power division with a filtering function to each port. The filter/power divider operates at a center frequency of 11.53 GHz with a fractional bandwidth of 37.2%, insertion loss of 8.44 dB to each port, and worst-case isolation of 9 dB between ports.