Robert Boschgmbh

Licentia Patent-verwaltungs Gmbh

Ant Nachrichtentechnik Gmbh

Wolfgang Hauth

Erich Pivit

Gunter Morz

Dietmar Schmitt

Sigmund Lenz

Wolfgang Ehrlinger

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.

Waveguide filter

A waveguide junction circulator for a high power application at a high operating frequency. The circulator includes a plurality of connecting waveguides, each of which has a standard height dimension corresponding to the operating frequency; a resonance cavity; a plurality of spaced and cooled, superposed metal plates covered with ferrite discs disposed in the cavity; a magnet disposed outside the cavity for generating a magnetic field oriented perpendicular to the ferrite discs and penetrating the cavity; and a plurality of junction arms each having one end communicating with the cavity and another end forming a connection with a respective one of the plurality of connecting waveguides. The circulator has a height dimension in its region penetrated by the magnetic field that is reduced by at least 20% compared to the standard height dimension of the connecting waveguides. Each connection presents a transition from the connecting waveguide to the junction arm that has a sudden change in cross section from the reduced height of the circulator to the standard height of the connecting waveguide. Reactance elements are provided in the junction arms to form multi-section filters.

High-frequency, high-power waveguide junction circulator

A microwave circulator comprising a substrate having a resonator affixed to one side thereof and a ferrite element affixed to the other. The side of the substrate to which the ferrite element is secured is covered with metal on the surface surrounding the ferrite element and is electrically and mechanically coupled to a metallized coating on the periphery of the ferrite element. The surface of the ferrite element projecting from the substrate is also metallized.

Microwave circulator on a substrate

Growing community of inventors

Backnang, Germany

Wolfgang Hauth