Robert Boschgmbh

Tesat-spacecom Gmbh & Co Kg

Franz-Josef Goertz

Dietmar Schmitt

Uwe Rosenberg

Juergen Damaschke

Dieter Wolk

A method and an arrangement for temperature compensation at circular resonators with dual mode utilization, which includes a material with a low coefficient of thermal expansion and for which the tensile or compressive forces are transferred to the resonator wall and produce elastic deformations there. The resonator wall is deformed in two mutually perpendicular directions in each case by the same absolute amount at one or more places along the axial e extent, the deformation forces being introduced into the resonator war over at least one flange. This has the advantage that the peripheral shape of the casing of the circular resonator is deformed so that both orthogonal dual modes experience uniform shortening with simultaneous expansion of the material, as a result of which a high compensation effect is achieved.

Method and device for compensating the temperature of circular resonators

For fixing a dielectric insert in a waveguide, clamping bodies are provided which contact the dielectric insert on its outer periphery only tangentially. The dielectric insert is fixed in a wave propagation direction by a supporting element. In a further embodiment, the dielectric insert is rigidly mounted on the supporting element. As a result thermal stresses can be absorbed.

Waveguide resonator device and filter structure provided therewith

A microwave filter has at least two resonators, with at least two degenerated wave types resonance-capable in one resonator. The resonators are in operative connection with one another so that possible couplings of the degenerated wave types are only overcouplings and these overcouplings are located outside the resonator in which the two degenerated wave types are resonance-capable. As a result, the microwave filter has higher quality, improved selection properties and optimal polarization adapation.

Growing community of inventors

Burgstetten, Germany

Franz-Josef Goertz