Abstract: A feedthrough for feeding a microwave signal through a wall of a casing comprises a signal waveguide having at least two portions having different cross-sections. The portion having the smaller cross-section is filled with plastically-deformable dielectric material which, under the action of pressure and heat, is bonded to the walls of the portion in which it is located. The dimensions of the portion are such as to provide an impedance match with the adjacent portions. An antenna couples electromagnetic energy between the waveguide and a strip transmission line. A metal cap seals the end of the waveguide and screens the antenna.

Abstract: A circulator comprises a housing in two halves with a ferrite and associated magnet in a central portion of a first one of the halves, the second housing-half above the ferrite having a membrane which is deformable by operation of an adjuster upon the membrane, so as to adjust the size of an airgap between the membrane and the ferrite. The membrane is preferably the residual portion of the second housing-half following a milling operation to provide a recess, the recess accommodating the adjuster in the form of, e.g., a screw. To further enhance predictability of the performance characteristics of the circulator, the ferrite is seated in a hollow formed in the first housing-half and the securing of the ferrite to the first housing-half is by way of an adhesive applied between a lateral face of the ferrite and a corresponding lateral face of the hollow.

Abstract: A transition from a waveguide to a microstrip, including a substrate having a plurality of ground surfaces superimposed on one another, the microstrip extending on the substrate and a plurality of through-contacts providing electrical connectivity to the plurality of ground surfaces. Wherein the waveguide includes a waveguide wall with an opening therein, the substrate projecting through the opening into the waveguide such that at least a portion of the microstrip is disposed within the waveguide, at least one of the plurality of ground surfaces being in contact with the waveguide wall.

Abstract: A feedthrough for feeding a microwave signal through a wall of a casing comprises a signal waveguide having at least two portions having different cross-sections. The portion having the smaller cross-section is filled with plastically-deformable dielectric material which, under the action of pressure and heat, is bonded to the walls of the portion in which it is located. The dimensions of the portion are such as to provide an impedance match with the adjacent portions. An antenna couples electromagnetic energy between the waveguide and a strip transmission line. A metal cap seals the end of the waveguide and screens the antenna.

Abstract: A circulator comprises a housing in two halves with a ferrite and associated magnet in a central portion of a first one of the halves, the second housing-half above the ferrite having a membrane which is deformable by operation of an adjuster upon the membrane, so as to adjust the size of an airgap between the membrane and the ferrite. The membrane is preferably the residual portion of the second housing-half following a milling operation to provide a recess, the recess accommodating the adjuster in the form of, e.g., a screw. To further enhance predictability of the performance characteristics of the circulator, the ferrite is seated in a hollow formed in the first housing-half and the securing of the ferrite to the first housing-half is by way of an adhesive applied between a lateral face of the ferrite and a corresponding lateral face of the hollow.

Abstract: A transition from a waveguide to a microstrip, including a substrate having a plurality of ground surfaces superimposed on one another, the microstrip extending on the substrate and a plurality of through-contacts providing electrical connectivity to the plurality of ground surfaces. Wherein the waveguide includes a waveguide wall with an opening therein, the substrate projecting through the opening into the waveguide such that at least a portion of the microstrip is disposed within the waveguide, at least one of the plurality of ground surfaces being in contact with the waveguide wall.

Abstract: The invention generally relates to tuning arrangements and tuning components for influencing an electric field in a microwave device, in particular in a microwave communication device such a microwave circulator and isolator, comprising a tuning element having a tuning portion which co-operates with the housing of the device in an electrically non-conductive manner.

Abstract: The invention generally relates to tuning arrangements and tuning components for influencing an electric field in a microwave device, in particular in a microwave communication device such a microwave circulator and isolator, comprising a tuning element having a tuning portion which cooperates with the housing of the device in an electrically non-conductive manner.

Abstract: An E-plane waveguide-circulator has a height-reducing branching region, a ferrite body located in the branching region so that a magnetic field extends through the ferrite body, the ferrite body being formed as a bar which extends through a total height of the branching region.

Abstract: In order for it to be possible to manufacture a transition with a cost-effective stamping or diecasting or cold-molding process or with a plastic injection-molding process with subsequent metal plating, at least one ridge situated in the waveguide, which reduces the waveguide cross section in the direction of the stripline, has a cross section which tapers conically in the direction of the stripline.

Abstract: An arrangement for frequency-selective suppression of high frequency signals is described, with a hollow chamber (11) including at least partially electrically conductive walls (6, 7) and having radiator elements (4, 5), embodied by stripline technology, for coupling the high frequency signals into and out of the hollow chamber (11). At least two radiator elements are present, of which at least one is intended for coupling in the high frequency signals and at least one other is intended for outcoupling them. The at least two radiator elements (4, 5) are embodied on separate substrate faces (2, 3). The separate substrate faces (2, 3) are disposed on a common substrate plate (1), and the hollow chamber is formed by a hood (6), which is disposed on or above the substrate plate (1) in such a way that it covers the radiator elements (4, 5). It is especially advantageous if the hood (6) is integrated with the housing wall (10) of a shielding housing.

Abstract: A matching network is to be provided which can quickly and easily be tuned to a desired impedance. The matching network has a first and a second line which are interconnected at one end, while their other ends are coupled to a microwave line, and a third line which branches off from the interconnection of the other two lines. The first and/or second line and the third line are loaded with ferrite. The ferrite of the first and/or second line and that of the third line are exposed to separate magnetic fields which can be varied independently of each other.

Abstract: A ferrite tuning arrangement for a resonator includes a ferrite loaded line in the form of a stripline having an inner conductor, an outer conductor and a ferrite disposed between the inner and outer conductors, with the stripline being adapted for coupling to the resonator. A reflecting termination is provided for the stripline and a magnetic circuit is provided for generating a variable premagnetization field for the ferrite in an orientation perpendicular to a high frequency magnetic field existing in the stripline.