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US 6,285,267 B1Granted
Waveguide filter
AssigneeRobert Bosch GmbH
InventorsWolfgang Hauth, Dietmar Schmitt
Life of this patent
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Abstract
A waveguide filter having a stepped transformer area on the input and/or output sides, with at least one band-stop filter composed of geometrically closely spaced stop elements integrated into this stepped transformer area. These features make it possible to build waveguide filters with a high edge steepness and a short overall length.
Claims10
A waveguide filter, comprising:
- a stepped transformer area provided on one of an input side and an output side;
- an area of alternate-height waveguide segments;
- and
- at least one band-stop filter formed as at least two closely spaced stop elements and integrated into the stepped transformer area, wherein a distance by which the at least two closely spaced stop elements are from one another is short compared to one fourth of a waveguide wavelength.
1 more element
Dependencies are inferred from the claim text.