Metal-plated plastic waveguide filter using injection molding process

A metal-plated plastic waveguide filter for Ka-band wireless Internet access systems is presented. As the filter is made using a plastic injection-molding process, the influence of indispensable draft angle on the waveguide walls was precisely considered in the design. By merging this design technique with the high-accuracy molding technique, no electrical tuning was necessary. It also realized the mass-productivity and cost reduction of Ka-band waveguide components.