Substrate integrated waveguide power divider based on multimode interference imaging

A 1 times N (with arbitrary N) power divider based on multimode interference imaging in substrate integrated waveguide (SIW) technology is proposed. This divider is demonstrated by fully-wave analysis and experimental results in the case of a division ratio of 1/6. It is implemented at Ka band with the use of continuous wall SIW geometry. The insertion loss from the input to each output of the divider at 25 GHz is -9 dB. Compared with traditional corporate dividing structures, this divider has a much simpler configuration and also a lower design complexity. This device may find applications in the design of millimeter-wave and quasi-optical spatial power combiners, antenna feeding networks and amplifiers.