摘要:
FMCW radar sensor for motor vehicles, having at least one antenna element and a modulation device for feeding the antenna element using a frequency-modulated transmission signal, whose frequency periodically sweeps a frequency band, characterized in that the antenna element has multiple subelements, which are positioned in a vertical column and fed serially, and the modulation device is implemented for the purpose of variably setting the frequency position of the frequency band.
摘要:
FMCW radar sensor for motor vehicles, having at least one antenna element and a modulation device for feeding the antenna element using a frequency-modulated transmission signal, whose frequency periodically sweeps a frequency band, characterized in that the antenna element has multiple subelements, which are positioned in a vertical column and fed serially, and the modulation device is implemented for the purpose of variably setting the frequency position of the frequency band.
摘要:
In a multibeam radar sensor apparatus having at least two transmission/reception channels, whose signal paths each include an antenna and a mixer, at least one first mixer is configured bidirectionally as a transfer mixer, and at least one second mixer is switchable from a first into a second operating state; in the first operating state, the mixer is bidirectionally configured as a transfer mixer, and in the second operating state, the mixer being configured in an at least approximately isolating manner as a receiving mixer. In addition, in a method for determining a distance and/or a speed of a target, a radar signal is transmitted in a direction of the target and a reflected radar echo is received, for which at least two transmission/reception channels are used whose signal paths each include an antenna and a mixer; at least one mixture is switched over from a first into a second operating state, in order to use the mixer, in the first operating state, bidirectionally as a transfer mixture, and, in the second operating state, in an at least approximately isolating manner as a receiving mixer.
摘要:
A sensor device, in particular a radar sensor device for a motor vehicle, in whose beam path at least one antenna exciter and at least one lens are situated, in which at least one diaphragm having a variable azimuthal opening width for realizing a variable azimuthal detection range of the radar sensor device is situated in the beam path between the at least one antenna exciter and the at least one lens.
摘要:
A radar sensor emits microwave radiation and receives partial radiation reflected at objects within the sensor detection range, a plurality of antennas being provided for the transmission and reception in each case, and the transmission power of the outer antennas being lower than the transmission power of the inner antennas. This is accomplished by reducing the transmission power with the aid of couplers, the couplers advantageously being implementable as Wilkinson power splitters.
摘要:
Radar sensor having a mixer for mixing a received signal with a reference signal and having a device for compensating interference signals which would overload the mixer, wherein the device for compensating the interference signals has an adjustable reflection point at the reference input of the mixer.
摘要:
A radar sensor having a transmission module and a signal stabilizer, which are situated on a shared circuit board, a casing, which accommodates the signal stabilizer and forms a shield against high frequency radiation of the signal stabilizer together with a conductive layer of the circuit board, and having a connection line, which crosses through the shield, to connect the signal stabilizer to the transmission module, in which the connection line is embedded in the circuit board in insulated fashion.
摘要:
In a multibeam radar sensor apparatus having at least two transmission/reception channels, whose signal paths each include an antenna and a mixer, at least one first mixer is configured bidirectionally as a transfer mixer, and at least one second mixer is switchable from a first into a second operating state; in the first operating state, the mixer is bidirectionally configured as a transfer mixer, and in the second operating state, the mixer being configured in an at least approximately isolating manner as a receiving mixer. In addition, in a method for determining a distance and/or a speed of a target, a radar signal is transmitted in a direction of the target and a reflected radar echo is received, for which at least two transmission/reception channels are used whose signal paths each include an antenna and a mixer; at least one mixture is switched over from a first into a second operating state, in order to use the mixer, in the first operating state, bidirectionally as a transfer mixture, and, in the second operating state, in an at least approximately isolating manner as a receiving mixer.
摘要:
A radar sensor emits microwave radiation and receives partial radiation reflected at objects within the sensor detection range, a plurality of antennas being provided for the transmission and reception in each case, and the transmission power of the outer antennas being lower than the transmission power of the inner antennas. This is accomplished by reducing the transmission power with the aid of couplers, the couplers advantageously being implementable as Wilkinson power splitters.
摘要:
A radar sensor for motor vehicles includes a plurality of transmission and receiving antennas, which differ in their azimuthal directivity characteristic and to which a separate mixer is assigned, which mixes a transmitted signal with a received signal, at least one of the mixers being a transfer mixer, and at least one other of the mixers having a lower transfer output, wherein the assignment of the transmission and receiving antennas is asymmetrical with respect to the mixers differing in their transfer output.