Corrugated circular coaxial waveguide and EM wave generator for use in satellite communications

The design, simulation and fabrication of a dual band waveguide structure for the direct broadcast satellite (DBS) market is presented. Using two frequency bands under study; 19.7-20.2 and 29.5-30 GHz, we have created a corrugated waveguide structure with a second higher band waveguide nested inside the outer waveguide. The design and simulation was carried out using CST´s Microwave Studio 2010 Suite and then machined at the workshop using CNC machines. Also created are waveguide launchers for the 19.7-20.2 GHz range which generate the EM signals needed for testing.