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1. 发明授权

US5982319A UHF synthetic aperture radar 失效
标题翻译： UHF合成孔径雷达
公开(公告)号：US5982319A
公开(公告)日：1999-11-09
申请号：US41215
申请日：1998-03-12
申请人： Scott C. Borden , George A. Ioannidis
发明人： Scott C. Borden , George A. Ioannidis
IPC分类号： G01S7/02 , G01S13/90
CPC分类号： G01S13/90
摘要： A synthetic aperture radar (SAR) which operates at UHF frequencies and which includes a two element antenna. The SAR generates a null in the backlobe of the antenna pattern at the location of a target which is steered rather than trying to obtain directivity in the mainlobe. Both analog and digital implementations are provided. In the analog approach, required phase shifts are performed at a frequency higher than the RF output frequency and the receive and transmit nulls are steered separately to increase the width of the null so as to allow for wider SAR swaths. The digital implementation involves steering the null only on receive and multiplying fast time samples by a complex phase correction similar to that used in the analog approach to form the beam. The phase correction is also performed prior to range resolution which employs "stretch" processing, so as to achieve high range resolution.
摘要翻译：一种以UHF频率工作的合成孔径雷达（SAR），其包括一个双元件天线。 SAR在天线图案的旁瓣中产生一个零点，在目标的位置被转向，而不是试图获得主瓣中的方向性。提供模拟和数字实现。在模拟方法中，以高于RF输出频率的频率执行所需的相移，并且接收和发送零点被分开转向以增加零点的宽度，以便允许更宽的SAR条带。数字实现涉及仅在快速时间采样的接收和乘法上进行空值的复杂相位校正，类似于模拟方法中使用的复相校正来形成波束。在采用“拉伸”处理的范围分辨率之前也执行相位校正，以便实现高范围分辨率。

2. 发明授权

US10222467B2 Two-way coded aperture three-dimensional radar imaging 有权
公开(公告)号：US10222467B2
公开(公告)日：2019-03-05
申请号：US14937394
申请日：2015-11-10
申请人： George A. Ioannidis , George W. Gigioli
发明人： George A. Ioannidis , George W. Gigioli
IPC分类号： H01Q3/38 , G01S13/88 , G01S13/89 , G01S7/282 , H01Q19/17 , H01Q19/19
摘要： A two-way coded aperture radar imaging system is disclosed. The system includes an antenna reflector and a radar signal transceiver configured to generate sequential radar transmission signals and receive a plurality of respective reflected radar signals. The system also includes a phase control component configured to phase-encode the sequential radar transmission signals via a plurality of phase-codes to generate a respective plurality of phase-coded radar pulses that are concurrently reflected at a respective plurality of sub-aperture portions of the antenna reflector to concurrently transmit the plurality of phase-coded radar pulses from the antenna reflector to a target. The transmitted phase-coded radar pulses can be reflected from the target as the respective plurality of reflected radar signals. The system further includes a sub-aperture radar controller configured to integrate the plurality of reflected radar signals and to generate a three-dimensional image of the target from the integrated plurality of reflected radar signals.

3. 发明申请

US20170131399A1 TWO-WAY CODED APERTURE THREE-DIMENSIONAL RADAR IMAGING 审中-公开
公开(公告)号：US20170131399A1
公开(公告)日：2017-05-11
申请号：US14937394
申请日：2015-11-10
申请人： George A. IOANNIDIS , George W. GIGIOLI
发明人： George A. IOANNIDIS , George W. GIGIOLI
IPC分类号： G01S13/89 , G01S7/282 , G01S13/88 , H01Q15/14
CPC分类号： G01S13/89 , G01S7/282 , G01S13/887 , H01Q3/38 , H01Q19/17 , H01Q19/192
摘要： A two-way coded aperture radar imaging system is disclosed. The system includes an antenna reflector and a radar signal transceiver configured to generate sequential radar transmission signals and receive a plurality of respective reflected radar signals. The system also includes a phase control component configured to phase-encode the sequential radar transmission signals via a plurality of phase-codes to generate a respective plurality of phase-coded radar pulses that are concurrently reflected at a respective plurality of sub-aperture portions of the antenna reflector to concurrently transmit the plurality of phase-coded radar pulses from the antenna reflector to a target. The transmitted phase-coded radar pulses can be reflected from the target as the respective plurality of reflected radar signals. The system further includes a sub-aperture radar controller configured to integrate the plurality of reflected radar signals and to generate a three-dimensional image of the target from the integrated plurality of reflected radar signals.

4. 发明授权

US4847624A Coordinate system transformation apparatus for a high resolution radar 失效
标题翻译：用于高分辨率雷达的坐标系变换装置
公开(公告)号：US4847624A
公开(公告)日：1989-07-11
申请号：US139512
申请日：1987-12-30
申请人： Francis W. Hopwood , Jerry A. Kane , George A. Ioannidis , Martin J. Decker
发明人： Francis W. Hopwood , Jerry A. Kane , George A. Ioannidis , Martin J. Decker
IPC分类号： G01S13/28 , G01S13/90
CPC分类号： G01S13/90 , G01S13/282
摘要： The present invention includes an apparatus that prebiases a transmitted radar signal. The prebiasing of the transmit signal automatically aligns the return signals in one dimension or dimensionally transforms the return signals thereby removing the need for one of the dimensional processing operations of a conventinal two dimensional return signal interpolator. A map function generator produces small frequency (phase) changes in the transmitted signal during each pulse over the entire integration or exposure period. The map function generator produces a parabolic frequency change control signal applied during the integration period. The control signal is divided into segments where each segment controls a single transmit pulse. The control signal modifies a linear frequency modulation control signal. conventionally produced by high resolution radar systems.
摘要翻译：本发明包括一种预发射雷达信号的装置。发射信号的预偏置自动地将返回信号对准一维，或者对返回信号进行尺寸变换，从而消除对传统二维返回信号内插器的维度处理操作之一的需要。地图函数发生器在整个整合或曝光期间的每个脉冲期间产生发射信号的小频率（相位）变化。地图函数发生器产生在积分期间施加的抛物线频率变化控制信号。控制信号被分成段，每个段控制单个发射脉冲。控制信号修改线性调频控制信号。通常由高分辨率雷达系统生产。

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