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公开(公告)号：US07061443B2
公开(公告)日：2006-06-13
申请号：US10815274
申请日：2004-04-01
IPC分类号： H01Q13/10
CPC分类号： H01Q21/005
摘要： A millimeter wave (MMW) antenna array includes a continuous transverse stub (CTS) radiating aperture comprising a set of spaced continuous transverse stubs, each having a longitudinal extent. A series feed system is coupled to an excitation source for exciting the stubs with MMW electromagnetic energy having a linear phase progression along the longitudinal extent of the stubs to produce an array beam which can be scanned over a beam scan range by changing the excitation frequency.
摘要翻译： 毫米波（MMW）天线阵列包括连续横向短截线（CTS）辐射孔，其包括一组间隔开的连续横向短截线，每个具有纵向延伸。 串联馈送系统耦合到激励源，用于以沿着短截线的纵向范围具有线性相位前进的MMW电磁能激发短截线，以产生可以通过改变激励频率在波束扫描范围上扫描的阵列波束。
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公开(公告)号：US20080225375A1
公开(公告)日：2008-09-18
申请号：US12148392
申请日：2008-04-18
IPC分类号： G02F1/01
摘要： A system for scanning an antenna array of the present invention. The system includes a first mechanism for modulating a desired signal on an optical carrier signal. The first mechanism includes a frequency-tunable optical oscillator with a phase shifter for changing an output frequency of the optical oscillator. A second mechanism employs the optical carrier signal to derive signals having predetermined phase relationships. A third mechanism receives the feed signals and radiates corresponding transmit signals in response thereto to the antenna array to steer the array. In more specific embodiment, the desired signal is a Radio Frequency (RF) signal, and the phase shifter is an electrically controlled optical RF phase shifter. The optical carrier signal includes a first optical carrier signal and a second optical carrier signal. The frequency-tunable optical oscillator includes a first tunable optical oscillator for providing the first optical carrier signal and a second tunable optical oscillator for providing the second optical carrier signal. The first and second optical oscillators include first and second optical RF phase shifters, respectively, that include feedback paths having optical and electrical sections.
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公开(公告)号：US07391367B2
公开(公告)日：2008-06-24
申请号：US10953145
申请日：2004-09-28
IPC分类号： H01Q3/34
CPC分类号： H01Q3/2676
摘要： A system for scanning an antenna array of the present invention. The system includes a first mechanism for modulating a desired signal on an optical carrier signal. The first mechanism includes a frequency-tunable optical oscillator with a phase shifter for changing an output frequency of the optical oscillator. A second mechanism employs the optical carrier signal to derive signals having predetermined phase relationships. A third mechanism receives the feed signals and radiates corresponding transmit signals in response thereto to the antenna array to steer the array. In more specific embodiment, the desired signal is a Radio Frequency (RF) signal, and the phase shifter is an electrically controlled optical RF phase shifter. The optical carrier signal includes a first optical carrier signal and a second optical carrier signal. The frequency-tunable optical oscillator includes a first tunable optical oscillator for providing the first optical carrier signal and a second tunable optical oscillator for providing the second optical carrier signal. The first and second optical oscillators include first and second optical RF phase shifters, respectively, that include feedback paths having optical and electrical sections.
摘要翻译： 一种用于扫描本发明的天线阵列的系统。 该系统包括用于调制光载波信号上的期望信号的第一机构。 第一机构包括具有用于改变光学振荡器的输出频率的移相器的频率可调谐的光学振荡器。 第二种机制采用光载波信号来导出具有预定相位关系的信号。 第三机构接收馈送信号并且响应于天线阵列辐射相应的发射信号以引导阵列。 在更具体的实施例中，期望的信号是射频（RF）信号，移相器是电控光学RF移相器。 光载波信号包括第一光载波信号和第二光载波信号。 频率可调谐光学振荡器包括用于提供第一光载波信号的第一可调谐光学振荡器和用于提供第二光载波信号的第二可调谐光振荡器。 第一和第二光学振荡器分别包括第一和第二光学RF移相器，其包括具有光学和电气部分的反馈路径。
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公开(公告)号：US07092596B2
公开(公告)日：2006-08-15
申请号：US10126569
申请日：2002-04-19
CPC分类号： G01S7/282 , G02B6/2861 , H01Q3/2676 , H01Q3/2682
摘要： A recirculating delay line that includes an optical delay circuit generates repetitions of an input signal waveform that is of limited time duration.
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5.发明授权公开(公告)号：US06175672B1
公开(公告)日：2001-01-16
申请号：US09336264
申请日：1999-06-18
申请人： Irwin L. Newberg , Robert R. Hayes , Kapriel V. Krikorian , Robert Y. Loo , Willie W. Ng , Robert A. Rosen
发明人： Irwin L. Newberg , Robert R. Hayes , Kapriel V. Krikorian , Robert Y. Loo , Willie W. Ng , Robert A. Rosen
IPC分类号： G02B628
CPC分类号： H04B10/2575
摘要： A substantially lossless transmissive link, such as an RF fiber optic link, that selectively employs a number of techniques to improve various link parameters. The link may be structured to comprise a high power light source, such as a laser, that provides light output having a high level of optical power. A feedback circuit may be disposed around the light source that reduces relative-intensity-noise levels produced by the light source at low frequencies. A modulator is provided that modulates the light output of the light source. Preferably, a dual output modulator may be used to provide two modulated optical signals whose respective RF modulation is “effectively” 180 degrees out of phase. An optical fiber that transmits the modulated optical signal(s). A photodetector without a load resistor directly on its output that is operable at the high level of optical power, receives the modulated light and recovers the RF signal. A dual balaniced photodetector that is used in conjunction with the dual output modulator. An RF component, such as an amiplifier, that is coupled directly to an output of the photodetector that provides a load resistance for the link.
摘要翻译： 基本上无损的透射链路，例如RF光纤链路，其选择性地采用多种技术来改善各种链路参数。 链路可以被构造为包括提供具有高水平光功率的光输出的诸如激光器的高功率光源。 可以在光源周围设置反馈电路，从而降低光源在低频时产生的相对强度噪声水平。 提供调制器来调节光源的光输出。 优选地，双输出调制器可以用于提供两个调制的光信号，其相应的RF调制“有效地”相位相差180度。 发送调制光信号的光纤。 没有负载电阻器的光电检测器直接在其输出端处可以在高功率电平下工作，接收调制的光并恢复RF信号。 双重平衡光电检测器，与双输出调制器结合使用。 RF分量，例如放大器，其直接耦合到光电检测器的输出端，为链路提供负载电阻。
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6.发明授权
公开(公告)号：US5933113A
公开(公告)日：1999-08-03
申请号：US711428
申请日：1996-09-05
CPC分类号： H01Q25/00 , H01Q21/061 , H01Q3/04 , H01Q3/22 , H01Q3/2676
摘要： Fiber optic delay lines in the form of a modified corporate feed having progressive phase delays and a corporate feed having equal phase delays are used to couple RF modulated light signals to detecting, mixing, amplifying and radiating devices of an active array radar. Different RF signals may be sent over the same fiber delay lines using different light colors (or wavelengths) so that the RF modulated signals in the fiber delay lines do not interact with each other. The RF signals can be put on and taken out of the fiber lines using wavelength division multiplexers, for example. This provides an array with a single optical manifold that allows simultaneous full aperture operation at multiple frequencies and/or beams over a wide operating frequency range.
摘要翻译： 使用具有逐行相位延迟的修改后的公司馈送形式的光纤延迟线和具有相等相位延迟的公司馈线将RF调制光信号耦合到有源阵列雷达的检测，混合，放大和辐射器件。 可以使用不同的光色（或波长）在相同的光纤延迟线上发送不同的RF信号，使得光纤延迟线中的RF调制信号彼此不相互作用。 例如，可以使用波分复用器将RF信号放在光纤线路中并从光纤线路中取出。 这提供了具有单个光学歧管的阵列，其允许在宽的工作频率范围内在多个频率和/或波束处同时进行全孔径操作。
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公开(公告)号：US07121502B2
公开(公告)日：2006-10-17
申请号：US11043543
申请日：2005-01-26
CPC分类号： F41G7/303 , F41G7/308 , G01S13/003 , G01S13/726 , G01S13/878
摘要： A guidance system for guiding each of several projectiles toward a moving target has a platform having a radar system for illuminating the target with a radar signal. Each projectile has a receiver for receiving the radar signal reflected from the target, a transponder for replying to Global Positioning System (GPS) like timing signals from several timing signal sources, and a data link transceiver for establishing a bidirectional data link to the platform. The data link carries the measured frequency shift of the radar signal reflected from the target as measured by the projectile. A computer on the platform computes a relative position of each projectile with respect to the target from tracking the moving target using the radar system and the reply signal from the transponder on each projectile. The data link sends guidance commands from the platform to each projectile to guide the projectile to the target.
摘要翻译： 用于将多个射弹中的每一个朝向移动目标引导的引导系统具有用雷达信号照射目标的雷达系统的平台。 每个抛射体具有用于接收从目标反射的雷达信号的接收器，用于响应于来自多个定时信号源的定时信号的全球定位系统（GPS）的应答器，以及用于建立到平台的双向数据链路的数据链路收发器。 数据链路携带由射弹测量的目标反射的雷达信号的测量频移。 平台上的计算机使用雷达系统计算每个射弹相对于目标的相对位置，并使用每个射弹的应答器的回复信号。 数据链接从平台向每个抛射体发送指导命令，以将射弹引导到目标。
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公开(公告)号：US07965226B2
公开(公告)日：2011-06-21
申请号：US12416064
申请日：2009-03-31
IPC分类号： G01S13/00
CPC分类号： G01S13/426 , G01S7/28 , G01S13/22 , G01S2013/0245 , G01S2013/0272
摘要： A system and method for concurrently operating a plurality of agile beam radar modes by pulse-to-pulse interleaving groups of the radar modes. Radar modes are grouped, each radar mode being allocated a certain amount of time for operation and a suitable pulse repetition frequency to improve or optimize the duty cycle of the antenna while concurrently operating the plurality of modes. Priorities may be assigned to groups or to individual radar modes within each group. In some embodiments, TDM communications are further interleaved within the radar modes to enhance the operation of the radar antenna.
摘要翻译： 一种用于通过雷达模式的脉冲到脉冲交织组同时操作多个敏捷波束雷达模式的系统和方法。 雷达模式被分组，每个雷达模式被分配一定量的操作时间和合适的脉冲重复频率，以在同时操作多个模式的同时改善或优化天线的占空比。 优先级可以分配给每个组内的组或各个雷达模式。 在一些实施例中，TDM通信在雷达模式内被进一步交织以增强雷达天线的操作。
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9.发明授权公开(公告)号：US07728756B2
公开(公告)日：2010-06-01
申请号：US11894069
申请日：2007-08-20
CPC分类号： G01S13/9035 , G01S2013/9082
摘要： A hovering helicopter has a radar transmitter/receiver for transmitting radar pulses for illuminating a target for SAR imaging, and rotor blades for generating lift. Radar reflectors are on the rotor blades. The radar reflectors are oriented to reflect the radar pulses from the transmitter to the target as the rotor blades rotate. The radar pulses reflected by the moving reflector from the transmitter are timed to generate the synthetic aperture image using radar returns from the target. The receiver also receives blade returns directly reflected from the moving reflectors attached to the lift rotor blades. The receiver analyzes the blade returns to extract motion details of the reflectors and uses the motion details for motion compensation of target returns for SAR imaging.
摘要翻译： 悬停的直升机具有雷达发射器/接收器，用于发射用于照射SAR成像目标的雷达脉冲，以及用于产生电梯的转子叶片。 雷达反射器位于转子叶片上。 当转子叶片旋转时，雷达反射器被定向以将发射器的雷达脉冲反射到目标。 来自发射机的移动反射器反射的雷达脉冲被定时以使用来自目标的雷达返回产生合成孔径图像。 接收器还接收从附接到提升转子叶片的运动反射器直接反射的叶片返回。 接收机分析刀片返回以提取反射器的运动细节，并使用运动细节进行SAR成像的目标返回的运动补偿。
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公开(公告)号：US07333049B2
公开(公告)日：2008-02-19
申请号：US11352072
申请日：2006-02-10
IPC分类号： G01S13/52
CPC分类号： G01S13/003 , G01S13/52
摘要： A radar transmitter is at a first location on a moving platform and illuminates a target with a sequence of frequency modulated radar pulses. The frequency modulated pulses are linear frequency modulated, i.e. chirped. The target reflects the frequency modulated radar pulses. A receiving antenna has a difference pattern null and receives the reflections from the target as a main scatterer and an ambiguity of the main scatterer. The sequence of pulses change the start of their frequency modulation (chirp) over a SAR array. The change in start frequency from pulse to pulse allows to shift the range ambiguity so as to align with the delay/Doppler difference pattern null of the antenna. Thus, both the main scatterer as well as the shifted range ambiguity are on the difference pattern null, facilitating their cancellation.
摘要翻译： 雷达发射器位于移动平台上的第一位置，并用一系列频率调制的雷达脉冲照射目标。 频率调制脉冲是线性调频的，即啁啾的。 目标反映了调频雷达脉冲。 接收天线具有差模式零，并且接收来自目标的反射作为主散射体和主散射体的模糊性。 脉冲序列通过SAR阵列改变其频率调制（啁啾）的开始。 从脉冲到脉冲的起始频率的变化允许移动范围模糊度，以便与天线的延迟/多普勒差分图形零点对齐。 因此，主要的散射体以及移动的范围模糊度都在差异模式为零，便于取消。
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