Abstract

Filters at microwave frequencies today normally are built in hybrid technology. In this paper principles for the monolit­hic integration of frequency selective structures without any external component are investigated. Monolithic Filters at frequencies about 10 GHz based on lumped LC-structures and about 30 GHz in coplanar waveguide technology are presented. Both filter concepts need active components to compensate the insertion loss of the filters. All components are interconnected by coplanar lines without reverse metalli­zation. The performance of these filters is investigated ex­perimentally.