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US 4,906,952 AGranted
Asymmetric waveguide load
AssigneeGeneral Electric Company
InventorsKrishna Praba, Stephen Scalph
Life of this patent
Estimating the term…
Abstract
A waveguide termination includes a rectangular waveguide having a pair of spaced-apart broad walls and a pair of narrow walls equally spaced from a plane of symmetry. The termination has a block or wedige of absorber material. The width of the absorber material is approximately half the width of the waveguide as measured between the narrow walls. The absorber material is located asymmetrically in the waveguide so that substantially all of the absorber material is on one side of the plane of symmetry.
Claims14
A waveguide arrangement, comprising:
- a rectangular waveguide defined by first and second elongated conductive narrow walls equally spaced from a first plane of symmetry, and first and second conductive broad walls connecting the edges of said first and second narrow walls, said first and second broad walls being equally spaced from a second plane of symmetry orthogonal to said first plane of symmetry, the intersection of said first and second planes of symmetry defining an axis of said rectangular waveguide;
- a conductive shorting wall oriented orthogonal to said axis and in contact with said first and second narrow walls and with said first and second broad walls for short-circuiting said rectangular waveguide at a shorting plane;
- and
- an energy absorbing termination including a wedge shaped energy absorber having a length in a direction parallel with said axis, a constant width approximately equal to half the width of said broad walls, and a height tapering monotonically over said length from a maximum dimension equal to the height of said narrow walls to a dimension substantially equal to zero, said wedge shaped energy absorber being located within said rectangular waveguide on one side of said first plane of symmetry with said maximum dimension nearest said shorting wall, leaving substantially the entirety of the corresponding region on the other side of said first plane of symmetry free of energy absorber.
1 more element
A method for fabricating a waveguide arrangement, comprising the steps of:
- forming a first half of an elongated rectangular waveguide including opposed narrow conductive walls spaced apart by broad conductive walls divided along a plane of symmetry which is parallel with said narrow walls of said rectangular waveguide and which passes through the axis of said waveguide;
- forming a complementary half of said elongated rectangular waveguide;
- fastening a tapered energy absorber in said first half so that no more than a small portion of said energy absorber extends past said plane of symmetry;
- fastening together said first and complementary halves of said rectangular waveguide such that no more than said small portion of energy absorber extends into said complementary half of said rectangular waveguide.
1 more element
A waveguide arrangement, comprising:
- a rectangular waveguide defined by conductive first and second narrow walls equally spaced from a first plane of symmetry, and conductive first and second broad walls connecting the edges of said first and second narrow walls, said first and second broad walls being equally spaced from a second plane of symmetry orthogonal to said first plane of symmetry and being adapted to part along said first plane of symmetry, the intersection of said first and second planes of symmetry defining an axis of said waveguide;
- a conductive shorting wall oriented orthogonal to said axis and in contact with said first and second narrow walls and with said first and second broad walls for short-circuiting said rectangular waveguide at a shorting plane;
- a tapered energy absorber including wide and narrow portions, said tapered energy absorber being located within said rectangular waveguide with the bulk of said energy absorber on one side of said first plane of symmetry and oriented with said narrow portion of said tapered energy absorber facing away from said shorting wall, the corresponding location on the other side of said first plane of symmetry being substantially devoid of energy absorber material.
Dependencies are inferred from the claim text.