Abstract: Methods, systems, and devices for free-space optical communications. An aircraft includes a flat optical communication terminal on an external surface of the aircraft, the flat optical communication terminal being configured to communicate with a ground station via a free-space optical communication link.

Abstract: Systems for wireless power transfer (WPT) include one or more WPT transmission devices and one or more WPT receiver devices to wirelessly receive power transmitted by the one or more WPT transmission devices. The WPT receiver devices are arranged at a fixed position relative to each of the WPT transmission devices. A WPT transmit controller of the systems is coupled to the one or more WPT transmission devices to control WPT transmission properties of the one or more WPT transmission devices in order to harmonize and adapt the transmit power level at the fixed position of the one or more WPT receiver devices.

Abstract: A radio frequency, RF, switch device includes a plurality of switch units, wherein the switch units are coupled in series between a first series terminal and a second series terminal to establish a switchable RF path; and a plurality of ballasting capacitor units, wherein each ballasting capacitor unit is coupled in parallel to a respective switch unit, to provide a selectable capacitance in parallel to a signal path of the respective switch unit, wherein each ballasting capacitor unit includes at least one ballasting capacitor switch element to switch the capacitance of the ballasting capacitor unit between a first capacitance value and a second capacitance value, wherein the second capacitance value is larger than the first capacitance value.

Abstract: An RF switch includes series-coupled RF switch cells coupled between an RF input and ground, each RF switch cell having an input, and a biasing network having outputs for individually biasing each of the RF switch cell inputs to a distinct bias voltage based upon a rank number of the RF switch cell.

Abstract: A radio frequency, RF, switch device includes a plurality of switch units, wherein the switch units are coupled in series between a first series terminal and a second series terminal to establish a switchable RF path; and a plurality of ballasting capacitor units, wherein each ballasting capacitor unit is coupled in parallel to a respective switch unit, to provide a selectable capacitance in parallel to a signal path of the respective switch unit, wherein each ballasting capacitor unit includes at least one ballasting capacitor switch element to switch the capacitance of the ballasting capacitor unit between a first capacitance value and a second capacitance value, wherein the second capacitance value is larger than the first capacitance value.

Abstract: An RF switch includes series-coupled RF switch cells coupled between an RF input and ground, each RF switch cell having an input, and a biasing network having outputs for individually biasing each of the RF switch cell inputs to a distinct bias voltage based upon a rank number of the RF switch cell

Abstract: An RF switch includes series-coupled RF switch cells coupled between an RF input and ground, a transistor including a first current node coupled to a first load resistor, a second current node coupled to ground, and a control node coupled to an internal switch node, and a filter having an input coupled to the first current node of the first transistor and an output for providing a DC voltage corresponding to the RF power present at the internal switch node.

Abstract: An RF switch includes series-coupled RF switch cells coupled between an RF input and ground, a transistor including a first current node coupled to a first load resistor, a second current node coupled to ground, and a control node coupled to an internal switch node, and a filter having an input coupled to the first current node of the first transistor and an output for providing a DC voltage corresponding to the RF power present at the internal switch node.

Abstract: In accordance with an embodiment, a circuit includes an RF switch, a leakage compensation circuit having a bias port and a reference port, a replica resistor coupled between a reference node and the reference port of the leakage compensation circuit, and a bias resistor coupled between the bias port of the leakage compensation circuit and a load path of the RF switch. The leakage compensation circuit configured to mirror a current from the bias port to the reference port, and apply a voltage from the reference port to the bias port.

Abstract: An RF switch includes series-coupled RF switch cells coupled between an RF input and ground, a transistor including a first current node coupled to a first load resistor, a second current node coupled to ground, and a control node coupled to an internal switch node, and a filter having an input coupled to the first current node of the first transistor and an output for providing a DC voltage corresponding to the RF power present at the internal switch node.

Abstract: A radio frequency (RF) power detector includes a first circuit having a first rectifying diode with a first terminal coupled to a first power supply voltage node. The first circuit also includes an input terminal coupled to a second terminal of the first rectifying diode, a first transistor having a first collector coupled to the second terminal of the first rectifying diode and a first emitter coupled to a reference voltage node, and a second transistor having a second emitter coupled to the reference voltage node and a second collector coupled to a second power supply voltage node. The first circuit further includes a low-pass filter network coupled between a first base of the first collector and a second base of the second transistor, and a first output terminal coupled to the second collector of the second transistor.

Abstract: In accordance with an embodiment, a circuit includes an RF switch, a leakage compensation circuit having a bias port and a reference port, a replica resistor coupled between a reference node and the reference port of the leakage compensation circuit, and a bias resistor coupled between the bias port of the leakage compensation circuit and a load path of the RF switch. The leakage compensation circuit configured to mirror a current from the bias port to the reference port, and apply a voltage from the reference port to the bias port.

Abstract: A radio frequency (RF) power detector includes a first circuit having a first rectifying diode with a first terminal coupled to a first power supply voltage node. The first circuit also includes an input terminal coupled to a second terminal of the first rectifying diode, a first transistor having a first collector coupled to the second terminal of the first rectifying diode and a first emitter coupled to a reference voltage node, and a second transistor having a second emitter coupled to the reference voltage node and a second collector coupled to a second power supply voltage node. The first circuit further includes a low-pass filter network coupled between a first base of the first collector and a second base of the second transistor, and a first output terminal coupled to the second collector of the second transistor.

Abstract: The present invention relates to a transmitting device for producing an analog-modulated pulse train and for emitting the same, comprising a pulse generator, with which a pulse train with an individual pulse form can be produced such that the pulse train falls in a predefined frequency band and/or into a predefined frequency mask, a modulation unit connected to the pulse generator and with which a pulse train can be analog-modulated by means of a predefined modulation scheme with respect to the amplitude thereof and/or the position of the individual pulses thereof, and an emitting unit, in particular an antenna, connected to the pulse generator and/or to the modulation unit and suitable for emitting in the predefined frequency band and/or in the frequency range of the predefined frequency mask, with which emitting unit the analog-modulated pulse train can be emitted, in particular beamed.

Abstract: Various embodiments may provide a circuit including a radio frequency (RF) power amplification module having an RF power amplifier. The RF power amplification module may further include a directional coupler coupled with the RF power amplifier and configured to produce a power signal at a coupling port of the directional coupler corresponding to an output power of the RF power amplifier. The RF power amplification module may further include a switch coupled between the coupling terminal and a sensing path to selectively couple the coupling port with a power detector via the sensing path. The RF power amplification module may further include a termination load coupled to an isolation port of the directional coupler. Some embodiments may include a plurality of RF power amplification modules coupled together by the sensing path.

Abstract: The present invention relates to a transmitting device and to a receiving device.

Abstract: A process and tool for producing a composite body part for a motor vehicle, especially for producing a roof module, the tool having a first tool part and a second tool part which are movable relative to one another. The outer skin is inserted in the first tool part, at least part of the peripheral edge area of the side of the outer skin facing the first tool part being moved into sealing contact with a seal arrangement which is provided on the first tool part, plastic material is applied to the side of the outer skin facing away from the first tool part, the second tool part provision shaping the plastic material, and the composite body part being released from the seal arrangement and removed from the tool.

Abstract: A process and tool for producing a composite body part for a motor vehicle, especially for producing a roof module, the tool having a first tool part and a second tool part which are movable relative to one another. The outer skin is inserted in the first tool part, at least part of the peripheral edge area of the side of the outer skin facing the first tool part being moved into sealing contact with a seal arrangement which is provided on the first tool part, plastic material is applied to the side of the outer skin facing away from the first tool part, the second tool part provision shaping the plastic material, and the composite body part being released from the seal arrangement and removed from the tool.

Abstract: A ventilation cap (3) for a motor vehicle roof (1) for ventilation of the motor vehicle interior (4) and a roof with such a ventilation cap, in which the ventilation cap (3) is formed to be oblong having an air duct with a front air opening (6) and with a rear air opening (7) which discharge above the motor vehicle roof (1), the air duct being flow-connected to the motor vehicle interior (4) via a flow path which is formed in the ventilation cap (3). The motor vehicle roof (1) is formed preferably as a glass roof with at least two glass surfaces (2a, 2b), on which the ventilation cap (3) is mounted essentially a central longitudinal axis.

Abstract: An openable motor vehicle roof with at least one cover which selectively closes the roof opening by means of a raising and displacement mechanism (crank path, crank pin, drive carriage) and at least partially clears it by raising or lowering its rear edge and by displacement along a guide rail, with a locking element which locks an element connected to the cover with the guide rail in the closed position and the raised position. For reliable and low-wear interlocking of the cover mechanism in the closed and raised position, with a simple structure, it is provided that, in a sliding and lifting roof with a cover which can be lowered and can be pushed under the fixed vehicle roof, there is a locking element on the locking lever which is pivotally located on a component (cover carrier) which is connected to the cover being disengaged from the guide rail toward the end of the lowering motion of the cover which precedes the displacement motion.