Claims
- 1. A corrugated waveguide having noncircularly symmetric corrugations centered on the axis of a circular bore for propagation in the HE.sub.11 mode, said noncircularly symmetric corrugations being uniformly spaced, and said circular bore consisting of circular grooves between said noncircularly symmetric corrugations.
- 2. A corrugated waveguide having noncircularly symmetric corrugations as defined in claim 1 including a transition waveguide for coupling radiation in the HE.sub.11 mode into said corrugated waveguide having nonlinearly symmetric corrugations, said transition waveguide having a gradual transition from a circularly corrugated waveguide to a noncircularly symmetric corrugated waveguide.
- 3. A corrugated waveguide having noncircularly symmetric corrugations as defined in claim 2 including a transition waveguide for coupling radiation in the HE.sub.11 mode out of said corrugated waveguide having noncircularly symmetric corrugations, said transition waveguide having a gradual transition from a noncircularly symmetric corrugated waveguide to a circularly symmetric corrugated waveguide.
- 4. A corrugated waveguide having noncircularly symmetric corrugations as defined in claim 1 wherein the depth of each corrugation is a function of .theta., where .theta. is an angular coordinate of each point on the surface of said corrugation, thereby to produce corrugations with axial wall admittance Y.sub.s as a function of the coordinate angle .theta..
- 5. A corrugated waveguide having noncircularly symmetric corrugations as defined in claim 4, wherein said admittance is given by
- Y.sub.s (.theta.)=i(.epsilon./Z.sub.0) cos (2.theta.),
- where i is .sqroot.-1, Z.sub.0 is free space impedance, and .epsilon. is the ellipticity of the corrugation surface admittance and represents elliptical deformation of the corrugation.
- 6. A corrugated waveguide having noncircularly symmetric corrugations as defined in claim 5, wherein the value of said ellipticity .epsilon. of the corrugation surface admittance which represents elliptical deformation of the corrugation is .ltoreq.1.
Government Interests
The Government has rights in this invention pursuant to Contract No. DE-AC03-84ER51044 awarded by the United States Department of Energy.
US Referenced Citations (5)