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    • 3. 发明申请
    • System and method for determining the bearing of a source location from a receiver location
    • 用于从接收器位置确定源位置的方位的系统和方法
    • US20070099627A1
    • 2007-05-03
    • US11264264
    • 2005-10-31
    • John KofolWilliam TrutnaGraham Flower
    • John KofolWilliam TrutnaGraham Flower
    • H04Q7/20
    • G01S1/30G01S19/38
    • The system comprises a first beatable signal source, a second beatable signal source, a phase reference signal source and a receiver. The first beatable signal source and the second beatable signal source are located at the source location; the receiver is located at the receiver location. The phase reference signal source is operable to generate a phase reference signal. The first beatable signal source is operable to transmit a first beatable signal. The second beatable signal source is spatially offset from the first beatable signal source in a reference direction, and is operable to transmit a second beatable signal differing in frequency from the first beatable signal by a frequency difference. The first beatable signal and the second beatable signal collectively have a phase relationship with the phase reference signal. The receiver is structured to receive the first beatable signal and the second beatable signal and is operable to determine a direction angle, relative to the reference direction, of the source location from the receiver location. The receiver performs operations that comprise measuring a phase difference between a beat signal and either the phase reference signal or an additional beat signal, and determining the direction angle from the measured phase difference. The beat signal obtained by a process involving summing the first beatable signal and the second beatable signal. The additional beat signal is obtained by a process involving summing the first beatable signal and the phase reference signal. The bearing can be determined from the direction angle.
    • 该系统包括第一可跳动信号源,第二可跳动信号源,相位参考信号源和接收器。 第一可匹配信号源和第二可匹配信号源位于源位置; 接收器位于接收器位置。 相位参考信号源可操作以产生相位参考信号。 第一可匹配信号源可操作以传送第一可捕获信号。 第二可匹配信号源在参考方向上与第一可捕获信号源在空间上偏移,并且可操作以将频率与第一可跳动信号不同的第二可播放信号传输频率差。 第一可跳动信号和第二可跳动信号共同地与相位参考信号相位关系。 接收器被构造成接收第一可捕获信号和第二可捕获信号,并且可操作以从源接收器位置确定源位置相对于参考方向的方向角度。 接收机执行包括测量拍频信号与相位参考信号或附加拍子信号之间的相位差的操作,以及根据测得的相位差确定方向角。 通过涉及将第一可拍信号和第二可拍信号相加的处理获得的拍频信号。 通过涉及对第一可匹配信号和相位参考信号求和的处理获得附加的拍频信号。 轴承可以从方向角度确定。
    • 6. 发明申请
    • System and method for microwave imaging using programmable transmission array
    • 使用可编程传输阵列进行微波成像的系统和方法
    • US20060109174A1
    • 2006-05-25
    • US11147899
    • 2005-06-08
    • Izhak BaharavRobert TaberGregory LeeJohn Kofol
    • Izhak BaharavRobert TaberGregory LeeJohn Kofol
    • G01S13/89
    • H01Q21/065G01S13/04G01S13/89G01V8/005H01Q3/26
    • A microwave imaging system uses microwave radiation provided by a microwave source to image targets. The system includes an array of antenna elements that are capable of being programmed with a respective transmission coefficient to direct the microwave illumination from the microwave source toward a position on the target. The antenna elements are further capable of being programmed with a respective additional transmission coefficient to receive reflected microwave illumination reflected from the position on the target and direct the reflected microwave illumination towards a microwave receiver. A processor is operable to measure an intensity of the reflected microwave illumination to determine a value of a pixel within an image of the target. Multiple beams can be directed towards the target to obtain corresponding pixel values for use by the processor in constructing the image.
    • 微波成像系统使用由微波源提供的微波辐射来对目标进行成像。 该系统包括天线元件阵列,其能够用相应的传输系数进行编程,以将来自微波源的微波照明引导到目标上的位置。 天线元件还能够用相应的附加传输系数进行编程,以接收从目标上的位置反射的反射的微波照射并将反射的微波照射引导到微波接收器。 处理器可操作以测量反射的微波照明的强度以确定目标图像内的像素的值。 多个光束可以被引向目标以获得对应的像素值,供处理器在构建图像时使用。