Design of ridge gap waveguide power divider for reduced-sidelobe 60 GHz applications

A wideband and low loss 1x16-element power divider using ridge gap waveguide technology is presented for 57-64 GHz band low sidelobe radiation applications. The 16-element divider is based on unequal power distribution to achieve a sidelobe level of -30 dB. The most important use of this single layer divider technology is to decrease complexity and to achieve low insertion losses. The design of pins and guiding ridges is presented in this paper along with a parametric study of the two-element power divider. Two different commercial simulators are used to verify the design accuracy. The proposed power divider has a wide bandwidth characterized by an input port matching parameter (S11) less than -10 dB) over the desired ISM band (57-64 GHz).