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    • 63. 发明公开
    • MILLIMETER WAVE IMAGING UNIT WITH FREQUENCY SCANNING ANTENNA
    • EP1920266A2
    • 2008-05-14
    • EP06813981.5
    • 2006-08-30
    • Trex Enterprises Corporation
    • LOVBERG, John, A.KOLINKO, VladimirBIBLE, Robert
    • G01S13/00G01S13/89
    • G01S13/04G01S13/887G01S13/89G01V8/005H01Q3/22H01Q21/0031
    • A frequency scanned millimeter wave imaging unit and discloses imaging system comprised of one or more of these units. The unit includes one or more millimeter wave frequency scanning antenna for collecting frequency dependent beams of millimeter wave radiation from a narrow one-dimensional field of view and millimeter wave amplifier components for amplifying the millimeter wave radiation collected by each antenna. Antennas can be sized according to the application. The unit includes a beam-former that separates the amplified radiation to produce frequency dependent signals corresponding to the frequency dependent beams. The beam-former includes delay lines, a millimeter wave lens, and an array of millimeter wave power detectors for detecting the power in each frequency dependent beam. A sampling circuit reads out the frequency dependent signals to produce a one-dimensional image of the antenna field of view. A two dimensional image of a target may be obtained by moving the target (or having the target move) across the field of view of the scanning antenna or by moving the antenna in order to scan its line of focus over the target. A standard unit has a 4.5-inch antenna and another standard unit has a 26-inch antenna. In preferred embodiments the 5.5-inch antenna unit is used along with other similar units in a portal imager and in a close-in whole body imager. This unit is also used in a hand-held unit and the larger 26-inch antenna unit is used in an imager system that can be focused at ranges between about 5 feet and infinity.
    • 频率扫描的毫米波成像单元并且公开了由一个或多个这些单元组成的成像系统。 该单元包括一个或多个毫米波频率扫描天线,用于收集来自窄的一维视场的毫米波辐射的频率依赖波束和用于放大由每个天线收集的毫米波辐射的毫米波放大器组件。 天线的尺寸可以根据应用进行调整。 该单元包括一个波束形成器,该波束形成器分离放大的辐射以产生对应于频率相关波束的频率相关信号。 波束形成器包括延迟线,毫米波透镜以及用于检测每个频率相关波束中的功率的毫米波功率检测器阵列。 采样电路读出频率相关信号以产生天线视场的一维图像。 目标的二维图像可以通过在扫描天线的视场上移动目标(或具有目标移动)或通过移动天线以便扫描目标上的焦点线来获得。 标准装置有4.5英寸天线,另一个标准装置有26英寸天线。 在优选实施例中,5.5英寸天线单元与门户成像器中的其他类似单元以及近距离全身成像器一起使用。 该装置还用于手持式装置,较大的26英寸天线装置用于可在约5英尺至无穷远范围内聚焦的成像仪系统。