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公开(公告)号：US20190068295A1
公开(公告)日：2019-02-28
申请号：US16174867
申请日：2018-10-30
发明人： Karl DOMINIZI , Oliver FRANK , Herbert JAEGER , Herbert KNAPP , Hao LI , Florian STARZER , Rainer STUHLBERGER , Jonas WURSTHORN
摘要： One exemplary embodiment of the present invention relates to a circuit that includes at least one RF signal path for an RF signal and at least one power sensor, which is coupled to the RF signal path and configured to generate a sensor signal representing the power of the RF signal during normal operation of the circuit. The circuit further includes a circuit node for receiving an RF test signal during calibration operation of the circuit. The circuit node is coupled to the at least one power sensor, so that the at least one power sensor receives the RF test signal additionally or alternatively to the RF signal and generates the sensor signal as representing the power of the RF test signal.
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公开(公告)号：US20220334218A1
公开(公告)日：2022-10-20
申请号：US17651331
申请日：2022-02-16
发明人： Josef KULMER , Patrick HOELZL , Hao LI
摘要： A method for the use in a radar system is described herein. In accordance with one implementation, the method includes providing a local oscillator signal to a transmit channel of a radar chip. The transmit channel generates an RF output signal based on the local oscillator signal. An internal RF test signal is generated by applying the local oscillator signal to the transmit channel. First and second phase values are determined for a first and a second value of an influence parameter of the radar chip based on internal measurements of the first and second phase values. Third and fourth phase values are determined for the first and second values of the influence parameter, respectively, based on the RF output signal. A calibration parameter is calculated based on the first, second, third, and fourth phase values and is used to estimate a phase of the RF output signal.
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公开(公告)号：US20210181326A1
公开(公告)日：2021-06-17
申请号：US16711928
申请日：2019-12-12
发明人： Manoj KURVATHODIL , Hao LI
摘要： A radar monolithic microwave integrated circuit (MMIC) includes a first transmission channel configured to output a first continuous-wave transmit signal based on a local oscillator signal having a first frequency; a first phase shifter provided on the first transmission channel and configured to apply a first phase setting to the first continuous-wave transmit signal to generate a first transmit signal having the first frequency; a first transmit monitoring signal path configured to couple out a portion of the first transmit signal from the first transmission channel as a first transmit monitoring signal; a frequency multiplier configured to receive a test signal and convert it into a multiplied test signal having a second frequency, where the first and the second frequencies are separated by a frequency offset; and a down-conversion mixer configured to mix the multiplied test signal and the first transmit monitoring signal to generate a first mixer output signal.
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公开(公告)号：US20220026527A1
公开(公告)日：2022-01-27
申请号：US17305728
申请日：2021-07-14
发明人： Josef KULMER , Ernst SELER , Hao LI , Gunther KRAUT , Oleksiy KLYMENKO , Patrick HOELZL
摘要： According to a first example implementation, the method comprises providing a local oscillator signal in a first radar chip based on a local oscillator signal generated in a further radar chip; supplying the local oscillator signal to a transmission channel of the first radar chip which, based on the local oscillator signal, generates an HF output signal; changing the temperature and/or supply voltage of the first radar chip; measuring phase values based on the local oscillator signal supplied to the transmission channel and of the corresponding HF output signal for different temperature values and/or for different supply voltage values of the first radar chip; and ascertaining calibration data based on the measured phase values for a phase calibration to compensate for changes in the phase of the HF output signal resulting from a change in the temperature and/or in the supply voltage.
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