Design of Low Loss 12 GHz Output Multiplexer for the Second Generation Telesat Canada Satellite

The basic design considerations for the 12 GHz low loss TE103 filters are described. The synthesis, optimization and realization of a new type low loss non-contiguous triplexer which uses the above filters and a WR75 manifold is presented. Test results of an engineering model unit currently being qualified for use in the F-4 Telesat Canada communications satellite are also provided, and are in good agreement with the calculated ones. The measured unloaded Q'S of the 4 pole TE103 dual mode elliptic filters used are well over 9,000.