RF-DAC digital signal modulation
    1.
    发明授权

    公开(公告)号:US12146938B2

    公开(公告)日:2024-11-19

    申请号:US17397271

    申请日:2021-08-09

    Abstract: Radar frequency range signals (e.g., 1 to 100 gigahertz) are often generated by upconverting a reference frequency to a transmission frequency, and a received signal may be downconverted to analyze information encoded on the transmission via modulation. Modulation may be achieved via a fractional frequency divider in a phase-locked loop, but fractional spurs may reduce the signal-to-noise ratio. Additionally, the ramp slope may vary due to phase-locked loop momentum. Instead, a clock generator may generate clock signals for a digital front end comprising a digital signal modulator that generates modulated digital values comprising quadrature representations of a radar modulation signal, which are encoded by a radiofrequency digital-to-analog converter (RF-DAC). The RF-DAC analog signal may be upconverted to a radar frequency and transmitted. A receiver may receive, downconvert, and analyze a reflection of the radar transmission, e.g., to perform range detection based on a frequency ramp encoded by the radar transmission.

    Circuit and method for a circuit
    3.
    发明授权
    Circuit and method for a circuit 有权
    电路的电路和方法

    公开(公告)号:US09214978B2

    公开(公告)日:2015-12-15

    申请号:US14136230

    申请日:2013-12-20

    Abstract: A circuit comprises a transmitter to provide a transmit signal. The circuit also comprises a coupler element to receive the transmit signal at an input port, to provide a first representation of the transmit signal at an antenna port and a second representation of the transmit signal at a testing port. The circuit further comprises a monitoring receiver unit. The monitoring receiver unit is coupled to the testing port. Furthermore, the monitoring receiver unit is configured to determine a characteristic of the second representation of the transmit signal.

    Abstract translation: 电路包括发送器以提供发送信号。 电路还包括耦合器元件,用于在输入端口处接收发射信号,以在天线端口处提供发射信号的第一表示,以及在测试端口处的发射信号的第二表示。 电路还包括监视接收器单元。 监测接收器单元耦合到测试端口。 此外,监视接收器单元被配置为确定发射信号的第二表示的特性。

    ACTIVE QUASI CIRCULATOR
    5.
    发明申请
    ACTIVE QUASI CIRCULATOR 有权
    主动准循环器

    公开(公告)号:US20160156085A1

    公开(公告)日:2016-06-02

    申请号:US14555623

    申请日:2014-11-27

    Abstract: An RF quasi circulator circuit is described herein. In accordance with one example of the disclosure the circuit includes a receive port, a transmit port and an antenna port as well as a differential amplifier stage having a first input, a second input and an output that is coupled to the receive port. The circuit further includes a first phase shifting element and a second phase shifting element. The first phase shifting element is coupled between the transmit port and the first input of the differential amplifier and the second phase shifting element is coupled between the transmit port and the second input of the differential amplifier. A tunable impedance is coupled to the differential amplifier, and the antenna port is coupled to the first input of the differential amplifier. The tunable impedance is controlled to tune the damping in a signal path from the transmit port to the receive port.

    Abstract translation: 本文描述了RF准循环器电路。 根据本公开的一个示例,电路包括接收端口,发送端口和天线端口以及具有耦合到接收端口的第一输入,第二输入和输出的差分放大器级。 电路还包括第一相移元件和第二相移元件。 第一相移元件耦合在差分放大器的发送端口和第一输入端之间,第二移相元件耦合在差分放大器的发送端口和第二输入端之间。 可调阻抗耦合到差分放大器,并且天线端口耦合到差分放大器的第一输入端。 可调阻抗被控制以调节从发射端口到接收端口的信号路径中的阻尼。

    CIRCUIT AND METHOD FOR A CIRCUIT
    7.
    发明申请
    CIRCUIT AND METHOD FOR A CIRCUIT 有权
    电路的电路和方法

    公开(公告)号:US20150180590A1

    公开(公告)日:2015-06-25

    申请号:US14136230

    申请日:2013-12-20

    Abstract: A circuit comprises a transmitter to provide a transmit signal. The circuit also comprises a coupler element to receive the transmit signal at an input port, to provide a first representation of the transmit signal at an antenna port and a second representation of the transmit signal at a testing port. The circuit further comprises a monitoring receiver unit. The monitoring receiver unit is coupled to the testing port. Furthermore, the monitoring receiver unit is configured to determine a characteristic of the second representation of the transmit signal.

    Abstract translation: 电路包括发送器以提供发送信号。 电路还包括耦合器元件,用于在输入端口处接收发射信号,以在天线端口处提供发射信号的第一表示,以及在测试端口处的发射信号的第二表示。 电路还包括监视接收器单元。 监测接收器单元耦合到测试端口。 此外,监视接收器单元被配置为确定发射信号的第二表示的特性。

    CIRCUIT AND METHOD FOR A CIRCUIT
    9.
    发明申请

    公开(公告)号:US20160080006A1

    公开(公告)日:2016-03-17

    申请号:US14950420

    申请日:2015-11-24

    Abstract: A circuit comprises a transmitter to provide a transmit signal. The circuit also comprises a coupler element to receive the transmit signal at an input port, to provide a first representation of the transmit signal at an antenna port and a second representation of the transmit signal at a testing port. The circuit further comprises a monitoring receiver unit. The monitoring receiver unit is coupled to the testing port. Furthermore, the monitoring receiver unit is configured to determine a characteristic of the second representation of the transmit signal.

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