RADAR SENSOR
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United States of America Patent
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app pub date -
Aug 12, 2015
filing date -
Sep 5, 2014
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Abstract
A radar sensor for generating and transmitting a transmit signal in a frequency band. The radar sensor includes a control device with an oscillator. One input of the oscillator is connected to the control device via a converter. The oscillator can be activated using the control device for generating the signal and the signal generated using the oscillator can be picked up at an output of the oscillator. At least one transmit antenna is provided for sending the signal present at the output of the oscillator The transmit antenna is connected to the output of the oscillator with at least one receive channel for receiving a receive signal, for processing the receive signal and for forwarding the processed receive signal to the control device. The receive channel has at least one receiving antenna and one mixer for mixing the receive signal with the signal present at the output of the oscillator. The mixer is connected to the output of the oscillator. A controllable power switch is provided in the transmit branch to attenuate or interrupt the forwarding of the signal at the output of the oscillator to the transmit antenna. If forwarding to the transmit antenna is attenuated or interrupted, a triggering of the oscillator can be carried out for interference detection.
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