Ka-Band AFSIW Power Divider and Coupler for Millimeter-wave Wireless Communication System

This paper presents Ka-band power divider and coupler based on the air-filled substrate integrated waveguide (AFSIW) technology. The utilization of air as the dielectric material in SIW structures offers reduced dielectric losses and enhanced performance for high-frequency applications. The AFSIW devices demonstrate lower loss, higher quality factor, and increased power handling capabilities compared to conventional SIW designs. These compact and lightweight components provide improved efficiency and isolation for millimeter-wave wireless communication systems.