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    Ground penetrating radar system
    1.
    发明授权
    Ground penetrating radar system 失效
    地面雷达系统

    公开(公告)号：US06445334B1

    公开(公告)日：2002-09-03

    申请号：US09752085

    申请日：2000-12-29

    申请人： Marshall R. Bradley ,  Robert J. McCummins, Jr. ,  Michael P. Crowe ,  Michael E. Duncan

    发明人： Marshall R. Bradley ,  Robert J. McCummins, Jr. ,  Michael P. Crowe ,  Michael E. Duncan

    IPC分类号： G01S1388

    CPC分类号： G01S7/20 ,  F41H11/136 ,  G01S7/35 ,  G01S13/88 ,  G01S13/885 ,  G01S13/90 ,  G01S2007/4073

    摘要： A ground penetrating radar system includes a cart configured to be movable along the ground. A computer is mechanically coupled to the cart. A radar electronics module is mechanically coupled to the cart and electrically coupled to the computer. A first antenna array is mechanically coupled to the cart, electrically coupled to the radar electronics module, and oriented to radiate into the ground and receive radiation from the ground. A second antenna array is mechanically coupled to the cart, electrically coupled to the radar electronics module, and oriented to radiate into the ground and receive radiation from the ground. A movement detector, which is configured to detect movement of the cart, is coupled to the computer. The computer is configured to trigger the radar electronics module when the computer detects that the cart has moved a predefined distance. The system uses nearfield beam forming, which is accomplished through fully coherent signal processing and synthetic aperture reception and processing, to image buried objects in three dimensions. The system displays a plan, or top, view and a side view of the area being scanned to provide a three dimensional perspective on a two dimensional computer screen.

    摘要翻译： 地面穿透雷达系统包括配置成可沿地面移动的推车。 计算机机械地联接到推车。 雷达电子模块机械耦合到推车并电耦合到计算机。 第一天线阵列机械地联接到手推车，电耦合到雷达电子模块，并且被定向成辐射到地面中并接收来自地面的辐射。 第二天线阵列机械耦合到推车，电耦合到雷达电子模块，并且定向成辐射到地面中并接收来自地面的辐射。 被配置为检测推车的移动的移动检测器被耦合到计算机。 计算机被配置为当计算机检测到推车已经移动预定距离时触发雷达电子模块。 该系统使用近场波束形成，其通过完全相干信号处理和合成孔径接收和处理来实现，以在三维图像中对掩埋物体进行成像。 系统显示正在扫描的区域的平面图，顶视图和侧视图，以在二维计算机屏幕上提供三维透视图。

    Circuit module for a phased array radar
    2.
    发明授权
    Circuit module for a phased array radar 失效
    相控阵雷达电路模块

    公开(公告)号：US6054948A

    公开(公告)日：2000-04-25

    申请号：US981582

    申请日：1997-12-10

    申请人： Michael Dean

    发明人： Michael Dean

    IPC分类号： G01S7/02 ,  G01S7/03 ,  G01S7/28 ,  G01S7/282 ,  G01S7/288 ,  G01S7/40 ,  G01S13/02 ,  H01Q21/00 ,  H01Q3/22 ,  H01Q3/24 ,  H01Q3/26

    CPC分类号： G01S7/032 ,  G01S7/4017 ,  H01Q21/00 ,  H01Q21/0025 ,  H01Q21/22 ,  G01S2007/2886 ,  G01S2007/4073 ,  G01S2013/0254 ,  G01S7/282 ,  H04Q2213/13003

    摘要： A circuit module for a phased array radar (10) incorporates radar frequency (RF) mixers (54a, 54b) connected to an RF splitter/combiner (52) and to in-phase and quadrature RF reference signals. The RF mixers (54a, 54b) are also connected to intermediate frequency (IF) processing circuitry (60 to 68) providing for phase control of RF signals and IF reference signals. In transmission mode, the RF mixer (54a, 54b) receive phase-controlled, digitally synthesised IF signals from clock-activated generators (68a, 68b). Their outputs are combined at the RF splitter/combiner (52) to provide single sideband upconversion of the phase-controlled IF signals. In reception mode, the RF splitter/combiner (52) and the RF mixers (54a, 54b) act as an image rejection mixer circuit in which the phase-controlled IF signals are local oscillator signals. Beamforming is carried out by computer control of the IF phase together with, in the case of reception, analogue or digital summation of output signals from an array of modules (12).

    摘要翻译： PCT No.PCT / GB95 / 01607 Sec。 371 1997年12月10日第 102（e）日期1997年12月10日PCT提交1995年7月7日PCT公布。 公开号WO97 / 03367 日期1997年1月30日用于相控阵雷达（10）的电路模块包括连接到RF分离器/组合器（52）的雷达频率（RF）混频器（54a，54b）以及同相和正交RF参考信号。 RF混频器（54a，54b）还连接到中频（IF）处理电路（60至68），用于RF信号和IF参考信号的相位控制。 在传输模式中，RF混频器（54a，54b）从时钟激活的发生器（68a，68b）接收相位控制的，数字合成的IF信号。 它们的输出在RF分离器/组合器（52）处组合，以提供相位控制的IF信号的单边带上变频。 在接收模式中，RF分离器/组合器（52）和RF混频器（54a，54b）用作相位控制IF信号是本地振荡器信号的镜像抑制混频器电路。 波束形成是通过IF阶段的计算机控制进行的，在接收的情况下，来自模块阵列（12）的输出信号的模拟或数字求和。

    Frequency-Modulated Continuous-Wave (FMCW)
    5.
    发明申请
    Frequency-Modulated Continuous-Wave (FMCW) 审中-公开
    频率调制连续波（FMCW）

    公开(公告)号：US20160245909A1

    公开(公告)日：2016-08-25

    申请号：US15001399

    申请日：2016-01-20

    申请人： Siemens Aktiengesellschaft

    发明人： Alan ASLETT ,  Johannes Theodorus Cornelis DUIVENVOORDEN ,  Jing LIU ,  Mihai-Gabriel SERBAN

    IPC分类号： G01S13/34 ,  G01F23/284

    CPC分类号： G01S13/34 ,  G01F23/284 ,  G01S7/4056 ,  G01S2007/4073

    摘要： A frequency-modulated continuous-wave (FMCW) radar system for level or distance measurement in which a frequency modulated signal to be transmitted to a target is mixed with an echo signal from the target to produce a beat signal that passes through an analog filter before being digitized and processed in a digital processor to determine the level or distance to be measured, where a test signal is generated by a signal generator, and a switch is controlled to connect the beat signal or the test signal to the analog filter, the signal generator generates the test signal as a broadband signal having a periodic waveform, e.g., a square wave, and the digital processor calculates a spectrum of the digitized filtered test signal by Fast Fourier Transform and generates a fault signal if the spectrum differs from a reference spectrum by a predetermined amount to allow for failure detection.

    摘要翻译： 用于电平或距离测量的频率调制连续波（FMCW）雷达系统，其中要发送到目标的调频信号与来自目标的回波信号混合，以产生通过模拟滤波器的差拍信号 在数字处理器中被数字化和处理以确定要测量的电平或距离，其中信号发生器产生测试信号，并且控制开关以将拍频信号或测试信号连接到模拟滤波器，信号 发生器产生测试信号作为具有周期波形（例如方波）的宽带信号，并且数字处理器通过快速傅里叶变换计算数字化滤波的测试信号的频谱，并且如果频谱与参考频谱不同，则产生故障信号 以预定量进行故障检测。

    Method and apparatus for autoranging, quadrature signal generation, digital phase reference, and calibration in a high speed RF measurement receiver
    7.
    发明授权
    Method and apparatus for autoranging, quadrature signal generation, digital phase reference, and calibration in a high speed RF measurement receiver 失效
    高速射频测量接收机的自适应方法和装置，信号生成，数字相位参考和校准

    公开(公告)号：US5125008A

    公开(公告)日：1992-06-23

    申请号：US491186

    申请日：1990-03-09

    申请人： Charles D. Trawick ,  Owen M. Caldwell

    发明人： Charles D. Trawick ,  Owen M. Caldwell

    IPC分类号： G01R31/00 ,  G01R29/10 ,  G01R35/00 ,  G01S7/40

    CPC分类号： G01S7/4004 ,  G01S7/4021 ,  G01S2007/4073

    摘要： Improved autoranging, calibration, and complex signal detection circuits for an intermediate frequency (IF) stage in a radio frequency (RF) measurement receiver. An improved autoranging circuit sets a gain stage of a selectively variable gain amplifier prior to each data acquisition cycle, to provide for wide dynamic range and rapid time domain response. An improved complex signal detection circuit for generating an inphase (I) and quadrature phase (Q) signal from an input IF signal in a signal channel and a reference channel is constructed with a novel commutating demodulator circuit. Calibration is effected with an improved digital phase reference method and apparatus wherein effectivr 90.degree. phase shifts are digitially generated by shifting the generation sequence of timing signals for the complex signal detection circuit instead of phase shifting a known calibration signal, obviating the need for precision phase shifters, Doppler frequency generators, or Fourier transforms to obtain correction components for the optimum detection of complex signals.

    摘要翻译： 用于射频（RF）测量接收机中的中频（IF）级的改进的自动量程，校准和复信号检测电路。 改进的自动量程电路在每个数据采集周期之前设置选择性可变增益放大器的增益级，以提供宽动态范围和快速时域响应。 一种用于在信号通道和参考通道中从输入IF信号产生同相（I）和正交相位（Q）信号的改进的复信号检测电路由新的换向解调器电路构成。 通过改进的数字相位参考方法和装置实现校准，其中通过移位复信号检测电路的定时信号的产生序列来代替相移已知校准信号来数字地产生90°相移，从而避免了对精度相位的需要 移相器，多普勒频率发生器或傅里叶变换，以获得用于复杂信号的最佳检测的校正分量。