Abstract: A dummy load for high power and high bandwidth, the dummy load comprising a base plate, a resistive termination acting as a resistive load for dissipating radio frequency power at low frequencies, and at least one coaxial cable acting as a cable load for dissipating radio frequency power at high frequencies, the at least one coaxial cable being connected to the resistive termination. At least one of the resistive termination and the at least one coaxial cable is positioned on the base plate. The at least one coaxial cable has a cross section that varies over the length of the coaxial cable.

Abstract: A dummy load for high power and high bandwidth, the dummy load comprising a base plate, a resistive termination acting as a resistive load for dissipating radio frequency power at low frequencies, and at least one coaxial cable acting as a cable load for dissipating radio frequency power at high frequencies, the at least one coaxial cable being connected to the resistive termination. At least one of the resistive termination and the at least one coaxial cable is positioned on the base plate. The at least one coaxial cable has a cross section that varies over the length of the coaxial cable.

Abstract: An amplifier according to the principle of load modulation comprises a first push-pull transistor, a second push-pull transistor and a balanced hybrid coupler. The first push-pull transistor is configured as a main amplifier and generates a balanced main-amplifier signal. The second push-pull transistor is configured as an auxiliary amplifier and generates a balanced auxiliary-amplifier signal. Outputs of the first push-pull transistor and of the second push-pull transistor are connected to the balanced hybrid coupler in such a manner that the balanced hybrid coupler combines the main-amplifier signal and the auxiliary amplifier signal according to the principle of load modulation to form a balanced output signal.

Abstract: An amplifier comprises a first amplifier circuit, a second amplifier circuit, a hybrid-coupler circuit and a termination. The hybrid-coupler circuit comprises an output port and an isolation port. The termination in this context is connected to the isolation port of the hybrid-coupler circuit. The termination comprises a first switch, a first capacitor and a first inductance.

Abstract: An amplifier includes a coupler, a main amplifier, and an auxiliary amplifier. The main amplifier and the auxiliary amplifier are supplied with signals derived from at least one input signal and amplify these. The coupler combines output signals of the main amplifier and of the auxiliary amplifier. The main amplifier and/or the auxiliary amplifier comprises an operating point adjustable during operation.

Abstract: An amplifier according to the principle of load modulation comprises a first push-pull transistor, a second push-pull transistor and a balanced hybrid coupler. The first push-pull transistor is configured as a main amplifier and generates a balanced main-amplifier signal. The second push-pull transistor is configured as an auxiliary amplifier and generates a balanced auxiliary-amplifier signal. Outputs of the first push-pull transistor and of the second push-pull transistor are connected to the balanced hybrid coupler in such a manner that the balanced hybrid coupler combines the main-amplifier signal and the auxiliary amplifier signal according to the principle of load modulation to form a balanced output signal.

Abstract: An amplifier comprises a first amplifier circuit, a second amplifier circuit, a hybrid-coupler circuit and a termination. The hybrid-coupler circuit comprises an output port and an isolation port. The termination in this context is connected to the isolation port of the hybrid-coupler circuit. The termination comprises a first switch, a first capacitor and a first inductance.

Abstract: An amplifier includes a coupler, a main amplifier, and an auxiliary amplifier. The main amplifier and the auxiliary amplifier are supplied with signals derived from at least one input signal and amplify these. The coupler combines output signals of the main amplifier and of the auxiliary amplifier. The main amplifier and/or the auxiliary amplifier comprises an operating point adjustable during operation.

Abstract: An amplifier component (1) provides a chip housing (40) and at least two amplifier elements (31, 32). Between at least two connections (51, 52 and 61, 62) of each amplifier element (31, 32), a parasitic capacitance (81, 82) is formed, wherein this parasitic capacitance (81, 82) is compensated by an inductive compensation element (2). The compensation element (2) itself is formed between two connecting contacts (101, 102) outside of the chip housing (40) by a connecting lug (2).

Abstract: The switching arrangement is used for the redundant power supply for a power amplifier, especially a high-frequency power amplifier. The power amplifier in this context provides several output-stage components and several power-supply units. The power-supply units are connected together at their load-end connections and supply the output-stage components jointly with energy. If a power-supply unit fails, at least two output-stage components are actively switched off, so that the power amplifier can continue to operate although with reduced output power.

Abstract: An amplifier component (1) provides a chip housing (40) and at least two amplifier elements (31, 32). Between at least two connections (51, 52 and 61, 62) of each amplifier element (31, 32), a parasitic capacitance (81, 82) is formed, wherein this parasitic capacitance (81, 82) is compensated by an inductive compensation element (2). The compensation element (2) itself is formed between two connecting contacts (101, 102) outside of the chip housing (40) by a connecting lug (2).

Abstract: The switching arrangement is used for the redundant power supply for a power amplifier, especially a high-frequency power amplifier. The power amplifier in this context provides several output-stage components and several power-supply units. The power-supply units are connected together at their load-end connections and supply the output-stage components jointly with energy. If a power-supply unit fails, at least two output-stage components are actively switched off, so that the power amplifier can continue to operate although with reduced output power.

Abstract: A transistor-clamping device for a transistor is provided with a holding block and a spring. The holding block engages over the transistor, so that the spring is pre-tensioned. A pressure plate is provided between the holding block and the transistor. The spring fixes the pressure plate on the transistor, so that a uniform pressure is applied to the transistor via the pressure plate, and, at the side facing away from the pressure plate, the latter accordingly provides a good thermal conduction to a cooling element.

Abstract: A calibration device for adjusting the forward power and reflected power measured via a single measuring directional coupler which is connected to a high-frequency transmitter, the forward power that is attenuated with ak+x and decoupled being used as a reference value. The calibration device comprises a changeover switch that is embodied as a double switch and is connected to the control and display unit via a control wire. A control signal that actuates the changeover switch is transmitted by the control and display unit, whereby switching occurs from a measurement of the reflected power to a measurement of the forward power. The forward power and the reflected power are measured via the same measuring directional coupler and by means of the same measuring sensor which is composed of a low pass and a rectifier.

Abstract: A transistor-clamping device for a transistor is provided with a holding block and a spring. The holding block engages over the transistor, so that the spring is pre-tensioned. A pressure plate is provided between the holding block and the transistor. The spring fixes the pressure plate on the transistor, so that a uniform pressure is applied to the transistor via the pressure plate, and, at the side facing away from the pressure plate, the latter accordingly provides a good thermal conduction to a cooling element.

Abstract: A balance-to-unbalance transformer (balun) comprising a first signal input/output with two symmetrical poles, a second signal input with one pole, several first conductor loop regions, which are located between the two poles of the first signal input and the ground and a second series connection of several conductor loop regions, the first terminal of the latter being connected to the pole of the second signal input. Two second conductor loop regions are electromagnetically coupled to a respective conductor loop region. The second outer terminal of the second series connection of several second conductor loop regions is electrically connected to the intermediate terminal of a first series connection of several first conductor loop regions, which connect a symmetrical pole of the first signal input to the ground.

Abstract: A calibration device for adjusting the forward power and reflected power measured via a single measuring directional coupler which is connected to a high-frequency transmitter, the forward power that is attenuated with ak+x and decoupled being used as a reference value. The calibration device comprises a changeover switch that is embodied as a double switch and is connected to the control and display unit via a control wire. A control signal that actuates the changeover switch is transmitted by the control and display unit, whereby switching occurs from a measurement of the reflected power to a measurement of the forward power. The forward power and the reflected power are measured via the same measuring directional coupler and by means of the same measuring sensor which is composed of a low pass and a rectifier.

Abstract: A balance-to-unbalance transformer (balun) comprising a first signal input/output with two symmetrical poles, a second signal input with one pole, several first conductor loop regions, which are located between the two poles of the first signal input and the ground and a second series connection of several conductor loop regions, the first terminal of the latter being connected to the pole of the second signal input. Two second conductor loop regions are electromagnetically coupled to a respective conductor loop region. The second outer terminal of the second series connection of several second conductor loop regions is electrically connected to the intermediate terminal of a first series connection of several first conductor loop regions, which connect a symmetrical pole of the first signal input to the ground.

Abstract: A method relating to a balun for transmitting a high degree of high-frequency power where metal sheet element is soldered onto the loop conductor tract of the symmetrical circuit loop, the conductor track being configured as a printed circuit. The metal sheet element is leaked with a cooling element on the electrically cold mass point of the loop.

Abstract: A method relating to a balun for transmitting a high degree of high-frequency power where a metal sheet element is soldered onto the loop conductor tract of the symmetrical circuit loop, the conductor track being configured as a printed circuit. The metal sheet element is linked with a cooling element on the electrically cold mass point of the loop.