Abstract: A sensor system for surrounding area detection for a motor vehicle, including an optical device for generating an optical transmission signal, and a transmitter device having: an optical input configured for receiving the optical transmission signal, a radio-based transmitter unit configured for emitting an electrical emitted signal, based on the optical transmission signal, and an optical transmitter unit configured for emitting an optical emitted signal which is based on the transmission signal. The sensor system also may include a receiver device having: an optical input configured for receiving the optical transmission signal, a radio-based receiver unit for receiving an electrical received signal, and an optical receiver unit for receiving an optical received signal. A central computing device is configured for processing emitted and/or received signals.

Abstract: Technologies and techniques for operating an electro-optical transmission device. An optical carrier signal is generated via an optical signal source of a base unit of the transmission device. An arbitrary signal is generated via the optical signal source, and the arbitrary signal is modulated onto the optical carrier signal in the base unit, forming a transmission signal. The transmission signal is transmitted to an antenna unit of the transmission device via an optical transmission medium, and the arbitrary signal and the carrier signal are separated in the antenna unit. Aspects also are directed to a computer program product and to a transmission device configured to perform such functions.

Abstract: The invention relates to a circuit containing a transimpedance amplifier for converting two input currents into two output voltages, having a first amplifier part containing a first input, to which a first input voltage is applied, and into which a first input current flows, and having a second amplifier part containing a second input, to which a second input voltage is applied and into which a second input current flows, wherein the first amplifier part and the second amplifier part are connected to a common supply voltage, the first amplifier part and the second amplifier part are connected to a common current source, the input of the first amplifier part and the input of the second amplifier part have a differing direct voltage, and the first amplifier part and the second amplifier part are designed such that an output voltage of the first amplifier part is proportional to the input current of the first amplifier part and an output voltage of the second amplifier part is proportional to an input current of

Abstract: The invention relates to a radar antenna arrangement (1) for a vehicle (2), comprising at least one vehicle component (3), wherein the radar antenna arrangement (1) comprises a plurality of radar devices (4) which are configured to transmit and/or receive a radar beam (12). The radar devices (4) are arranged on a component surface (5) of the vehicle component (3). The invention provides for the radar antenna arrangement (1) to comprise at least one antenna row (6) for determining an azimuthal angle (10) of the radar beam (12), said antenna row comprising a plurality of the radar devices (4). Directly adjacent radar devices (4) have respective horizontal distances (8) from one another. The radar antenna arrangement (1) comprises at least one antenna column (7) for determining an elevation angle (11) of the radar beam (12), said antenna column comprising a plurality of the radar devices (4). Directly adjacent radar devices (4) have respective vertical distances (9) from one another.

Abstract: A radar system having at least one radar transmission unit, at least one radar reception unit, a central unit, and a glass fiber for connecting these units, wherein the central unit has a central optical transmission unit to provide an optical radar driver signal, and wherein the at least one radar transmission unit has an optical reception unit and a radar transmitter, wherein the optical reception unit receives the optical radar driver signal and converts the optical radar driver signal into an electrical radar driver signal and provides the electrical radar driver signal for driving the radar transmitter, wherein the at least one radar reception unit includes a radar receiver, a mixer and an optical modulation unit. Also disclosed is an associated method.

Abstract: The invention relates to a circuit containing a transimpedance amplifier for converting two input currents into two output voltages, having a first amplifier part containing a first input, to which a first input voltage is applied, and into which a first input current flows, and having a second amplifier part containing a second input, to which a second input voltage is applied and into which a second input current flows, wherein the first amplifier part and the second amplifier part are connected to a common supply voltage, the first amplifier part and the second amplifier part are connected to a common current source, the input of the first amplifier part and the input of the second amplifier part have a differing direct voltage, and the first amplifier part and the second amplifier part are designed such that an output voltage of the first amplifier part is proportional to the input current of the first amplifier part and an output voltage of the second amplifier part is proportional to an input current of

Abstract: A chip antenna comprising at least one emitter which extends parallel to a main surface of a semiconductor substrate supporting the chip antenna, wherein the emitter is arranged on an island-like support zone of the semiconductor substrate, the support zone being surrounded by at least one trench which is completely filled with a gas, the trench passing through the entire depth of the semiconductor substrate and being bridged by at least one retaining web which forms a supporting connection between the support zone and the rest of the semiconductor substrate.

Abstract: A radar system having at least one radar transmission unit, at least one radar reception unit, a central unit, and a glass fiber for connecting these units, wherein the central unit has a central optical transmission unit to provide an optical radar driver signal, and wherein the at least one radar transmission unit has an optical reception unit and a radar transmitter, wherein the optical reception unit receives the optical radar driver signal and converts the optical radar driver signal into an electrical radar driver signal and provides the electrical radar driver signal for driving the radar transmitter, wherein the at least one radar reception unit includes a radar receiver, a mixer and an optical modulation unit. Also disclosed is an associated method.

Abstract: A chip antenna comprising at least one emitter which extends parallel to a main surface of a semiconductor substrate supporting the chip antenna, wherein the emitter is arranged on an island-like support zone of the semiconductor substrate, the support zone being surrounded by at least one trench which is completely filled with a gas, the trench passing through the entire depth of the semiconductor substrate and being bridged by at least one retaining web which forms a supporting connection between the support zone and the rest of the semiconductor substrate.

Abstract: A junction transistor, comprising, on a substrate an emitter layer, a collector layer, and a base layer that comprises a graphene layer, wherein an emitter barrier layer is arranged between the base layer and the emitter layer, and a collector barrier layer is arranged between the base and the collector layers and adjacent to the graphene layer, characterized in that the collector barrier layer is a compositionally graded material layer, which has an electron affinity that decreases in a direction pointing from the base layer to the collector layer.

Abstract: A digital polar modulator (DPM) for transforming a baseband signal into a modulated digital modulator output signal comprises an input unit and two low-pass delta-sigma modulators, a first one being connected downstream from the first input part and configured to provide at its output a first pulse train in dependence on an amplitude- modulating baseband signal component, and a second one being connected downstream from the second input part and configured to provide at its output a multilevel quantized signal in dependence on a phase modulating baseband signal component; a multiphase generator, which is configured to provide a set of square-wave carrier signals having a common carrier frequency and exhibiting discrete phase shifts with respect to each other; a multiplexer, which is configured to provide a multiplexer output signal that is formed by switching, in dependence on a signal received at a select input as a function of time, between selected ones of the carrier signals; and a combiner unit.

Abstract: A hot hole transistor with a graphene base comprises on a substrate an emitter layer, a collector layer, and a base layer that comprises a graphene layer, wherein an emitter barrier layer is arranged between the base layer and the emitter layer, and a collector barrier layer is arranged between the base and the collector layers and adjacent to the graphene layer.

Abstract: A digital polar modulator (DPM) for transforming a baseband signal into a modulated digital modulator output signal comprises an input unit and two low-pass delta-sigma modulators, a first one being connected downstream from the first input part and configured to provide at its output a first pulse train in dependence on an amplitude- modulating baseband signal component, and a second one being connected downstream from the second input part and configured to provide at its output a multilevel quantized signal in dependence on a phase modulating baseband signal component; a multiphase generator, which is configured to provide a set of square-wave carrier signals having a common carrier frequency and exhibiting discrete phase shifts with respect to each other; a multiplexer, which is configured to provide a multiplexer output signal that is formed by switching, in dependence on a signal received at a select input as a function of time, between selected ones of the carrier signals; and a combiner unit.

Abstract: A hot hole transistor with a graphene base comprises on a substrate an emitter layer, a collector layer, and a base layer that comprises a graphene layer, wherein an emitter barrier layer is arranged between the base layer and the emitter layer, and a collector barrier layer is arranged between the base and the collector layers and adjacent to the graphene layer.

Abstract: The present invention relates to a device (2000) and a method for encoding an input signal (102) into a digital pulse-width and/or phase modulated output signal (162). The present invention also relates to a transmission method, a power amplifier and a transmitter. With the aid of a mapping process comprising at least three-stages, a sequence of output pulses (162) is generated which corresponds on average over time to a theoretical, previously computed target pulse. In this way, the device (2000) or the method can be digitally implemented and a large part (100, 110) of the device (2000) can also be operated at a clock rate that is substantially lower than a clock rate of the output signal generator (200, 220).

Abstract: A junction transistor, comprising, on a substrate an emitter layer, a collector layer, and a base layer that comprises a graphene layer, wherein an emitter barrier layer is arranged between the base layer and the emitter layer, and a collector barrier layer is arranged between the base and the collector layers and adjacent to the graphene layer, characterized in that the collector barrier layer is a compositionally graded material layer, which has an electron affinity that decreases in a direction pointing from the base layer to the collector layer.

Abstract: The invention relates to an upstream unit (1) for a switched power amplifier (2) for a high-frequency transmission circuit (16). The upstream unit (1) supplies a pulse-length modulated HF pulse signal (22) to the switched power amplifier (2), wherein the linearity of the pulse length modulation and of the high-frequency transmission circuit is improved. The upstream unit (1) according to the invention has a first signal input (3) for a high-frequency, phase-modulated first input signal (18), a second signal input (4) for a second input signal (19) having a low frequency in comparison with the first input signal, a controllable first delay unit (5), a controllable second delay unit (7), a pulse generator (9) and a control unit (10).

Abstract: The invention relates to an upstream unit (1) for a switched power amplifier (2) for a high-frequency transmission circuit (16). The upstream unit (1) supplies a pulse-length modulated HF pulse signal (22) to the switched power amplifier (2), wherein the linearity of the pulse length modulation and of the high-frequency transmission circuit is improved. The upstream unit (1) according to the invention has a first signal input (3) for a high-frequency, phase-modulated first input signal (18), a second signal input (4) for a second input signal (19) having a low frequency in comparison with the first input signal, a controllable first delay unit (5), a controllable second delay unit (7), a pulse generator (9) and a control unit (10).

Abstract: The present invention relates to a device (2000) and a method for encoding an input signal (102) into a digital pulse-width and/or phase modulated output signal (162). The present invention also relates to a transmission method, a power amplifier and a transmitter. With the aid of a mapping process comprising at least three-stages, a sequence of output pulses (162) is generated which corresponds on average over time to a theoretical, previously computed target pulse. In this way, the device (2000) or the method can be digitally implemented and a large part (100, 110) of the device (2000) can also be operated at a clock rate that is substantially lower than a clock rate of the output signal generator (200, 220).

Abstract: The invention relates to an apparatus for precise modulation of signal phase and signal delay, respectively, and signal amplitude, comprising a first fixed-delay device having its input coupled to an input signal, a first variable delay device having its input coupled to said input signal and having a control input for delay adjustment, a first amplitude control device in series with the first variable delay device, providing at its output an amplitude controlled signal and having a control input for adjusting the output amplitude, a phase detector with linear characteristic having its two inputs connected to the output of the fixed-delay device and the output of the first amplitude control device, an error measurement device having its negative input connected to the output of the phase detector and its positive input connected to a control signal, an amplifier with low-pass characteristic having its input connected to the output of the error measurement device and its output to the control input of the firs