Bi-layered substrate integrated waveguide Wilkinson power divider/combiner

This paper proposes a novel substrate integrated waveguide (SIW) power divider and combiner based on a modified Wilkinson architecture. This topology allows SIW waveguide to use conserving then shielding quality. The proposed design consists on a ring circuit of 1.5 λg length with three waveguide accesses. The optimal configuration of inserting the resistance is studied. A bi-layered circuit is fabricated with standard PCB process. Output return loss and isolation measurement results better than -10 dB are observed across around 25 % bandwidth over X-band (8.5 GHz to 11 GHz).