Patent ID: 8686910
Filing Date: 2014-04-01
Classification: H01P,H01Q

Abstract:
1. A load for traveling waves, the load having: an input waveguide for RF and having a stationary part and a rotating part, said rotating part coupled to a reflector, said reflector having a front surface for coupling to RF in said input waveguide and a back surface which shields impinging RF from coupling to said input waveguide; an inner volume formed by a first end cap, a second end cap, and a cylindrical body therebetween, said first end cap having an aperture for said input waveguide and said reflector; said inner volume first end cap and an adjacent extent of said cylindrical body having an absorptive coating and forming a terminal reflection surface, said inner volume second end cap and an adjacent extent of said cylindrical body forming a secondary reflection surface, said cylindrical body secondary reflective surface having an absorptive coating, and an extent between said terminal reflection surface and said secondary reflection surface forming a primary reflection surface; whereby RF coupled to said input waveguide is reflected from said rotating reflector to said primary reflection surface, thereafter to said secondary reflection surface, and thereafter to said terminal reflection surface and onto said rotating reflector back surface; and where a reflection loss of said primary reflection surface absorptive coating is less than a reflection loss of said secondary reflection surface absorptive coating.