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.