Machined two-piece microwave waveguide

Abstract

Machineable microwave waveguide apparatus and method for constructing same. Waveguide functions as an interconnecting waveguide channel between two parallel microwave ports which have an axial offset. The waveguide is comprised of two complimentary halves with C-shaped cross-section, the two halves fitting together to form a single unit. The fit-together unit is capped, and can be sealed for pressure-tight applications.

We claim: 
     
       1. A waveguide for connecting two waveguide ports of offset waveguides, said waveguide comprising: a waveguide section, said waveguide section being rectangularly shaped in a transverse directin perpendicular to an energy flow and being S-bend shaped in a longitudinal direction parallel to said energy flow, said waveguide section having a first element and a second element for forming a conductive waveguide chamber, said second element being a complimentary mirror-image of said first element such that when said first and said second elements are fixedly joined by brazing said conductive waveguide chamber is formed therebetween, each of said elements being C-shaped in said transverse direction and having three walls unitarily formed with right angles in said transverse direction, said section having parallel end faces, said section being formed of a metallic material that allows the transmission of microwave energy therethrough without significant loss, said section formed to minimize voltage standing wave ratio,   a first flange plate, said first flange plate having an interior face and an exterior face, said first flange plate having means for mounting, said exterior face being mounted by said means for mounting to one of said waveguide ports, said interior face being fixedly attached to one of said end faces of said waveguide section, said interior face having a closely fitting recess therein for fixedly holding by brazing said waveguide section, said first flange plate having a port therethrough for allowing said microwave energy to pass between said waveguide section and said offset waveguides with a minimum of loss; and   a second flange plate, said second flange plate being similar to said first flange plate in shape, said second flange plate mounted to the other of said end faces of said waveguide section and to the other of said offset waveguides, each of said flange plates being essentially parallel to said waveguide ports of attachment.