2-WAY POWER DIVIDER FOR PARTIALLY PARALLEL FEED IN SINGLE-LAYER SLOTTED WAVE-GUIDE ARRAYS

The authors propose a novel waveguide two-way power divider, named as tau-junction, in a feed waveguide of a single-layer slotted;waveguide array antenna. This junction occupies only a small space and is placed in the middle of a cascade of several power dividers. It suppresses t he long Line effect and widens the bandwidth of the feed waveguide. Th e junction has two inductive walls; one is for suppressing the reflect ion and the other is for controlling the ratio of divided power to the two output ports. Analysis using Galerkin's method of moments is veri fied by experiments of a 4 GHz-band model. We install the junctions in a 12 GHz-band single-layer slotted waveguide array. The gain reductio n at the band-edge is suppressed.