公开(公告)号：US12072435B2

公开(公告)日：2024-08-27

申请号：US17684672

申请日：2022-03-02

Applicant: Infineon Technologies AG

Inventor： Alexander Melzer ,  Francesco Lombardo

IPC: G01S7/03 ,  G01S7/35 ,  G01S13/931 ,  H04B1/403

CPC classification number: G01S7/032 ,  G01S7/35 ,  G01S13/931 ,  H04B1/403

Abstract: A cascaded RF system includes a first MMIC and at least a second MMIC. During a first mode of operation: using an LO generation circuit of the first MMIC to generate a first LO signal based on a system clock signal; outputting the first LO signal from an LO output port of the first MMIC; receiving the first LO signal via a first LO input port of the first MMIC; and receiving the first LO signal via a second LO input port of the second MMIC. During a second mode of operation: using an LO generation circuit of the second MMIC to generate a second LO signal based on the system clock signal; and outputting the second LO signal from an LO output port of the second MMIC to a first LO input port of the second MMIC and to a second LO input port of the first MMIC.

公开(公告)号：US11837797B2

公开(公告)日：2023-12-05

申请号：US17412694

申请日：2021-08-26

Applicant: Infineon Technologies AG

Inventor： Jochen O. Schrattenecker ,  Niels Christoffers ,  Vincenzo Fiore ,  Bernhard Gstoettenbauer ,  Helmut Kollmann ,  Alexander Melzer ,  Alexander Onic ,  Rainer Stuhlberger ,  Mathias Zinnoecker

IPC: H01Q3/36 ,  G01S7/35 ,  G01S7/40 ,  H03L7/06 ,  G01S13/02 ,  G01S13/34 ,  G01S7/03 ,  G01S13/88 ,  G01S13/931 ,  H04B1/16 ,  H04B1/10 ,  G01R25/04

CPC classification number: H01Q3/36 ,  G01S7/032 ,  G01S7/35 ,  G01S7/4008 ,  G01S7/4017 ,  G01S7/4026 ,  G01S7/4073 ,  G01S13/02 ,  G01S13/343 ,  G01S13/88 ,  H03L7/06 ,  G01R25/04 ,  G01S7/4069 ,  G01S13/931 ,  G01S2013/0254 ,  H04B1/10 ,  H04B1/109 ,  H04B1/1081 ,  H04B1/1638

Abstract: A circuit includes a radio frequency (RF) channel including an input node and an output node and being configured to receive an RF oscillator signal at the input node and to provide an RF output signal at the output node; a mixer configured to mix an RF reference signal and an RF test signal representative of the RF output signal to generate a mixer output signal; an analog-to-digital converter configured to sample the mixer output signal in order to provide a sequence of sampled values; and a control circuit configured to provide a sequence of phase offsets by phase-shifting at least one of the RF test signal and the RF reference signal using one or more phase shifters, calculate a spectral value from the sequence of sampled values; and calculate estimated phase information indicating a phase of the RF output signal based on the spectral value.

公开(公告)号：US11428775B2

公开(公告)日：2022-08-30

申请号：US17019828

申请日：2020-09-14

Applicant: Infineon Technologies AG

Inventor： Alexander Melzer ,  Andreas Dollinger ,  Rene Kobler ,  Georg Krebelder ,  Christoph Wagner ,  Martin Wiessflecker

IPC: G01S7/02 ,  G01S13/58 ,  G01S7/35 ,  G01S13/931

Abstract: A radar system includes a local oscillator for generating a local oscillator signal, transmission channels, and a reception channel. The transmission channels are designed to generate and output RF radar signals based on the local oscillator signal The transmission channels have phase shifters for setting the phase of the RF radar signals. The reception channel is designed to receive an RF signal and to convert it into a baseband signal by using the local oscillator signal supplied thereto. A method includes operating the local oscillator in a CW mode, setting a specific combination of phase shifts for the phase shifters of the transmission channels, altering the phase of the local oscillator signal supplied to the reception channel or of the phase shifts of the phase shifters by a phase offset, and ascertaining that phase offset for which the baseband signal at least approximately assumes a maximum.

公开(公告)号：US11269050B2

公开(公告)日：2022-03-08

申请号：US16577282

申请日：2019-09-20

Applicant: Infineon Technologies AG

Inventor： Philipp Schmidt ,  Alexander Melzer ,  Andreas Och

IPC: G01S7/03 ,  G01S13/34 ,  G01S7/35 ,  G01S13/04

Abstract: A radar system includes a first integrated radar circuit having a plurality of first transmission paths and a local oscillator configured to generate a local oscillator signal. The first integrated radar circuit has a first terminal configured to output an oscillation signal based on the local oscillator signal. The radar system includes a second integrated radar circuit having a second transmission path and a second terminal. The radar system includes a partially reflective element coupled to the first terminal via a first line section and to the second terminal via a second line section. The partially reflective element is configured to reflect back a first portion of the oscillation signal as a reflected signal via the first line section to the first terminal and to pass on a second portion of the oscillation signal as a forward signal via the second line section to the second terminal.

公开(公告)号：US20220026521A1

公开(公告)日：2022-01-27

申请号：US17450346

申请日：2021-10-08

Applicant: Infineon Technologies AG

Inventor： Alexander Melzer ,  Paul Meissner ,  Mate Andras Toth

IPC: G01S7/02 ,  G01S7/35

Abstract: In accordance with an embodiment, a method of operating a radar system includes activating a transmitter to transmit a radar signal during a first time period, receiving a reflection of the radar signal from a radar antenna, downconverting the reflected radar signal, and digitally processing the downconverted reflected radar signal within a first frequency bandwidth using a first signal path. The method also includes deactivating the transmitter during a second time period, receiving a second signal from the radar antenna during the second time period, downconverting the second signal, measuring a power of the downconverted second signal within a second frequency bandwidth using a second signal path different from the first signal path, and determining an interference metric based on measuring the power.

公开(公告)号：US11029388B2

公开(公告)日：2021-06-08

申请号：US16259160

申请日：2019-01-28

Applicant: Infineon Technologies AG

Inventor： Alexander Melzer ,  Michael Gerstmair ,  Mario Huemer ,  Alexander Onic ,  Christian Schmid ,  Rainer Stuhlberger

IPC: G01S7/40 ,  G01S13/34 ,  G01S13/87 ,  G01S7/03 ,  G01S13/931 ,  G01S7/35

Abstract: A method is described that, according to one exemplary embodiment, involves the following: generating a first radio frequency (RF) signal by a first RF oscillator and a second RF signal by a second RF oscillator, mixing the first RF signal and the second RF signal by a mixer to generate a mixer output signal, digitizing the mixer output signal to generate a digitized signal, and calculating an estimate for a power spectral density of the mixer output signal from the digitized signal. Based on the estimate for the power spectral density of the mixer output signal, an estimate for a noise power spectral density characterizing the noise contained in the first and the second RF signals is calculated.

公开(公告)号：US11016171B2

公开(公告)日：2021-05-25

申请号：US16266523

申请日：2019-02-04

Applicant: Infineon Technologies AG

Inventor： Alexander Melzer ,  Mario Huemer ,  Paul Meissner ,  Fisnik Sulejmani ,  Matthias Wagner

IPC: G01S7/292 ,  G01S13/93 ,  G01S13/34 ,  G01S13/931 ,  G01S7/35 ,  G01S7/02 ,  G01S7/36 ,  G01S7/40 ,  G01S13/12 ,  G01S13/534

Abstract: A radar method is described herein. In accordance with one embodiment the method includes receiving a plurality of chirp echoes of transmitted radar signals, generating a digital signal based on the plurality of chirp echoes, and calculating a range map based on the digital signal. The range map includes a plurality of values, each value is represented by an amplitude value and a phase value, and each value is associated with one frequency bin of a set of frequency bins and one chirp echo of the plurality of chirp echoes. The method further includes identifying chirp echoes which are affected by interference and determining, for one or more selected frequency bins, corrected phase values based on phase values that are associated with chirp echoes not identified as affected by interference.

公开(公告)号：US10663559B2

公开(公告)日：2020-05-26

申请号：US15726433

申请日：2017-10-06

Applicant: Infineon Technologies AG

Inventor： Mario Huemer ,  Alexander Melzer ,  Alexander Onic ,  Rainer Stuhlberger

IPC: G01S7/28 ,  G01S13/34 ,  G01S7/03 ,  G01S7/35 ,  G01S7/40 ,  H03B1/04 ,  G01S13/931 ,  G01S7/02

Abstract: A method for cancelling phase noise in a radar signal is described herein. In accordance with one embodiment, the method includes transmitting an RF oscillator signal, which represents a local oscillator signal including phase noise, to a radar channel and receiving a respective first RF radar signal from the radar channel. The first RF radar signal included at least one radar echo of the transmitted RF oscillator signal. Further, the method includes applying the RF oscillator signal to an artificial radar target composed of circuitry, which applies a delay and a gain to the RF oscillator signal, to generate a second RF radar signal. The second RF radar signal is modulated by a modulation signal thus generating a frequency-shifted RF radar signal. Further, the method includes subtracting the frequency-shifted RF radar signal from the first RF radar signal.

公开(公告)号：US11754667B2

公开(公告)日：2023-09-12

申请号：US17450346

申请日：2021-10-08

Applicant: Infineon Technologies AG

Inventor： Alexander Melzer ,  Paul Meissner ,  Mate Andras Toth

IPC: G01S7/02 ,  G01S7/35

CPC classification number: G01S7/023 ,  G01S7/0232 ,  G01S7/352

Abstract: In accordance with an embodiment, a method of operating a radar system includes activating a transmitter to transmit a radar signal during a first time period, receiving a reflection of the radar signal from a radar antenna, downconverting the reflected radar signal, and digitally processing the downconverted reflected radar signal within a first frequency bandwidth using a first signal path. The method also includes deactivating the transmitter during a second time period, receiving a second signal from the radar antenna during the second time period, downconverting the second signal, measuring a power of the downconverted second signal within a second frequency bandwidth using a second signal path different from the first signal path, and determining an interference metric based on measuring the power.

公开(公告)号：US11719802B2

公开(公告)日：2023-08-08

申请号：US17403096

申请日：2021-08-16

Applicant: Infineon Technologies AG

Inventor： Florian Starzer ,  Helmut Kollmann ,  Alexander Melzer ,  Rainer Stuhlberger ,  Roland Vuketich ,  Mathias Zinnoecker

IPC: G01S13/34 ,  G01S7/35 ,  G01S13/931 ,  G01S7/40 ,  G01S7/03 ,  G01S13/42 ,  G01S13/87

CPC classification number: G01S13/343 ,  G01S7/352

Abstract: A radar method is described. According to one exemplary embodiment, the method includes generating a first RF oscillator signal in a first chip and supplying the first RF oscillator signal to a transmission (TX) channel of the first chip and transmitting the first RF oscillator signal from the TX channel of the first chip to the second chip via a transmission line.