Abstract: A method for operating an amplifier module of a communication satellite involves saving at least one configuration parameter of the amplifier module in a non-volatile memory designed to store the configuration parameter when the amplifier module is not energized. The configuration parameter can be loaded from the non-volatile memory and used to configure the amplifier module.

Abstract: A mismatch protection circuit for high frequency power amplifiers includes a waveguide coupler connected to the output of the high frequency power amplifier. The waveguide coupler includes a first detector diode, which supplies, according to the power level being applied, a first voltage, which corresponds to the effective power that is fed in. The waveguide coupler also includes a second detector diode, the outputted second voltage of which corresponds to the power that is reflected due to the mismatch. The protection circuit further includes a control circuit, with which the amount of a mismatch is determined from the difference between the voltage value at the second diode and a reference voltage. The output stage(s) of the high frequency power amplifier(s) is and/or are switched on or off, depending on whether the voltage difference drops below or exceeds a given reference value.

Abstract: A housing includes first and second housing elements, each of which is heat conductive. The housing elements are joined by a joining process in which a joining material is configured between the first and second housing elements and at least one of the housing elements is heated such that the joining material is conditioned for the joining of the housing elements. At least one of the housing elements has a localized reduction in the heat conductivity such that the dissipation of heat in the at least one housing element is reduced.

Abstract: A control apparatus for an earth-distant-platform includes a control unit, which includes with a control input and a control output, and a memory element. The memory element contains a plurality of operating value parameter sets for an RF transmit amplifier unit. The control input receives a control signal and, dependent on the control signal, the control unit selects an operating value parameter set from the memory element. The control output controls an energy supply unit and/or a preamplifier/linearization element using the selected operating value parameter set such that the RF transmit amplifier unit is operable in a defined operating state.

Abstract: A method for testing the tightness of a housing involves providing a pressure sensor in a housing, sealing the housing, and detecting a pressure level in the housing.

Abstract: A waveguide busbar for conducting microwaves includes a group input for coupling in a group microwave signal, a plurality of filter inputs for coupling in a plurality of microwave signals, a dual waveguide that comprises a first single waveguide and a second single waveguide. The plurality of filter inputs are disposed along the dual waveguide, as well as at least one adjustable coupling member that provides a connection between the first single waveguide and the second single waveguide and that is configured such that it adjusts a phase length of the connection.

Abstract: A microwave filter includes a first adjustable coupling resonator connected via a first coupling screen to an input of the microwave filter, a frequency resonator configured to establish a transmission frequency of the microwave filter and connected to the first adjustable coupling resonator via a second coupling screen, and a second adjustable coupling resonator connected to the frequency resonator via a third coupling screen.

Abstract: Disclosed is a predistortion linearizer for power amplifiers using a bridge topology, which has the advantages that an equalizer stage is disposed in each of the linear and nonlinear branches. This equalizer stage is used to adjust the frequency response of the complex expansion of the bridge. The equalizers introduce variable transmission functions in the linear and nonlinear bridge branches, so that the linearizer compensates for the individual nonlinear frequency response of a power amplifier, which varies within a manufacturing lot.

Abstract: A system for communication between two communication platforms, including a near-earth returning platform and a remote platform. A bidirectional asymmetrical communication link is set up between the two platforms.

Abstract: To measure and regulate temperature, a temperature measuring resistor and a control element are accommodated in one layer as metallization on a substrate. The printed or otherwise manufactured conductors of the temperature measuring resistor and of the control element are arranged in close proximity to one another.

Abstract: 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.

Abstract: An R switch with a stator and a rotor with three paths wherein a central, straight interconnection is constructed as step transformers and formed bar-like by recesses incorporated laterally in the in the steps of the transformers in order to lower the low frequency limit of the HF signals which can be transmitted.

Abstract: An input multiplexer, for which the high circuit order bandpass filters are connected by means of a low loss busbar of conducting pieces of optimized length into an IMUX.

Abstract: A busbar arrangement for coupling waveguide filters of output multiplexers wherein the side walls of short-circuited T-shaped or Y-shaped branch regions of the busbar are constructed for coupling the waveguide filters.

Abstract: The present invention provides a non-laser-active solid which is connected to a laser-active solid which has a reflective layer system and is cooled by a cooling member. Parallel isothermal planes are created in laser-active solid which are passed through by laser beam at a shallow angle. In this manner, a compact laser beam amplifier system is created which functions without a costly beam shaping optical system for semiconductor laser, and has a good beam quality even at high power.

Abstract: A waveguide switch having a stator and an electrically conducting movable element, the stator having waveguide paths between waveguide terminal pairs, each path being switchable to conducting or nonconducting with the help of the movable element for high-frequency waves. To permit lower requirements regarding manufacturing tolerances, the movable element is designed as a septum in a gap in the stator and extends in the waveguide path, which is switched to nonconducting, in parallel to its E plane. This divides the waveguide path into two partial waveguides, which run in parallel with one another and, in comparison with the switched-to-conducting state of the waveguide path, have smaller cut-off wavelengths.