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1. 发明授权

US6081226A Multi-mode radar exciter 失效
标题翻译：多模雷达激励器
公开(公告)号：US6081226A
公开(公告)日：2000-06-27
申请号：US113210
申请日：1998-07-10
申请人： Stephen P. Caldwell , Francis W. Hopwood , Thomas K. Lisle, Jr. , Wayne Weigle
发明人： Stephen P. Caldwell , Francis W. Hopwood , Thomas K. Lisle, Jr. , Wayne Weigle
IPC分类号： G01S7/282 , G01S7/288 , G01S13/02 , G01S13/10
CPC分类号： G01S13/106 , G01S7/282 , G01S7/288 , G01S2013/0272
摘要： A radar exciter including a direct digital synthesis (DDS) wideband waveform generator which performs the frequency synthesis function heretofore performed by a direct analog synthesizer. This is achieved by deriving the DDS frequencies, the exciter RF frequencies, the radar synchronizer clock frequency and receiver analog/digital (A/D) converter clock frequency from a common signal source generating a master frequency. The present invention eliminates the direct analog synthesizer and relies solely on the digital generation of waveforms by a DDS wideband waveform generator which performs a discrete sampling process so as to provide coherent frequency and timing relationships.
摘要翻译：包括直接数字合成（DDS）宽带波形发生器的雷达激励器，其执行由直接模拟合成器执行的频率合成功能。这是通过从产生主频率的公共信号源导出DDS频率，激励器RF频率，雷达同步器时钟频率和接收器模拟/数字（A / D）转换器时钟频率来实现的。本发明消除了直接模拟合成器，并且仅依赖于执行离散采样处理以提供相干频率和时序关系的DDS宽带波形发生器的数字生成波形。

2. 发明授权

US5745076A Transmit/receive module for planar active apertures 失效
公开(公告)号：US5745076A
公开(公告)日：1998-04-28
申请号：US708439
申请日：1996-09-05
申请人： Thomas R. Turlington , Patrick G. Farrell , Gerald K. Kane , Gary L. Ferrell , Scott K. Suko , Joseph A. Faulkner , Gregory K. Sinon , Francis W. Hopwood , Andrew J. Piloto
发明人： Thomas R. Turlington , Patrick G. Farrell , Gerald K. Kane , Gary L. Ferrell , Scott K. Suko , Joseph A. Faulkner , Gregory K. Sinon , Francis W. Hopwood , Andrew J. Piloto
IPC分类号： G01S7/03 , H01Q3/24 , H01Q21/00
CPC分类号： G01S7/032 , G01S7/034 , H01Q21/0025 , H01Q21/0087 , H01Q3/24 , H01Q3/247
摘要： A T/R module including a multilevel, multichip microwave package having a plurality of gallium arsenide monolithic microwave integrated circuit chips (MMICs) implementing RF switching elements, a variable phase shifter, a plurality of RF amplifiers, and gain trim attenuators and which are located on a planar RF assembly. The module's architecture includes shared or common MMIC circuit elements during both transmit and receive operation modes thus reducing the number of MMICs required while at the same time preloading the supply voltage regulator-modulator which supplies DC power to all the MMIC circuits without degrading T/R module efficiency.

3. 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。

4. 发明授权

US4009448A Phase lock loop for a voltage controlled oscillator 失效
标题翻译：压控振荡器的锁相环
公开(公告)号：US4009448A
公开(公告)日：1977-02-22
申请号：US646800
申请日：1976-01-06
申请人： Francis W. Hopwood , Lester K. Staley
发明人： Francis W. Hopwood , Lester K. Staley
IPC分类号： H03L7/12 , H03B3/04
CPC分类号： H03L7/12 , H03L2207/14
摘要： A phase lock loop configuration having a voltage controlled oscillator utilized, for example, in radar systems wherein false locking is prevented and loop bandwidth is maintained substantially constant. The voltage controlled oscillator includes a cavity resonator within which is located two tuning varactor diodes, one of which is heavily coupled to the resonator and comprises a coarse tuning port and one of which is lightly coupled and comprises the fine tuning port. The configuration is such that when the loop is locked, following a sweep mode of the coarse tuning voltage, the fine tune voltage is held constant at a predetermined DC level thereby making the fine tuning sensitivity essentially constant as the coarse tuning voltage changes the frequency over the band of interest.
摘要翻译：一种具有压控振荡器的锁相环配置，例如在雷达系统中被利用，其中防止假锁定并且保持环路带宽基本恒定。压控振荡器包括空腔谐振器，在谐振腔内设置有两个调谐变容二极管，其中一个与谐振器重耦合，并包括一个粗调谐端口，其中一个微调耦合并包括微调端口。该配置使得当环路被锁定时，在粗调谐电压的扫描模式之后，微调电压保持恒定在预定的DC电平，从而使得微调电压基本上恒定，因为粗调谐电压改变频率感兴趣的乐队。

5. 发明授权

US5940031A Transmit/receive module for planar active apertures 失效
标题翻译：用于平面有效孔径的发射/接收模块
公开(公告)号：US5940031A
公开(公告)日：1999-08-17
申请号：US56094
申请日：1998-04-07
申请人： Thomas R. Turlington , Patrick G. Farrell , Gerald K. Kane , Gary L. Ferrell , Scott K. Suko , Joseph A. Faulkner , Gregory K. Sinon , Francis W. Hopwood , Andrew J. Piloto
发明人： Thomas R. Turlington , Patrick G. Farrell , Gerald K. Kane , Gary L. Ferrell , Scott K. Suko , Joseph A. Faulkner , Gregory K. Sinon , Francis W. Hopwood , Andrew J. Piloto
IPC分类号： G01S7/03 , H01Q3/24 , H01Q21/00
CPC分类号： G01S7/032 , G01S7/034 , H01Q21/0025 , H01Q21/0087 , H01Q3/24 , H01Q3/247
摘要： A T/R module including a multilevel, multichip microwave package having a plurality of gallium arsenide monolithic microwave integrated circuit chips (MMICs) implementing RF switching elements, a variable phase shifter, a plurality of RF amplifiers, and gain trim attenuators and which are located on a planar RF assembly. The module's architecture includes shared or common MMIC circuit elements during both transmit and receive operation modes thus reducing the number of MMICs required while at the same time preloading the supply voltage regulator-modulator which supplies DC power to all the MMIC circuits without degrading T/R module efficiency.
摘要翻译： AT / R模块包括具有实现RF开关元件的多个砷化镓单片微波集成电路芯片（MMIC）的多电平多芯片微波封装，可变移相器，多个RF放大器和增益调整衰减器，并且位于平面RF组件。该模块的架构包括发射和接收操作模式下的共享或公共MMIC电路元件，从而减少所需的MMIC数量，同时预加载供应电压调节器调制器，其向所有MMIC电路提供直流电而不降低T / R 模块效率。

6. 发明授权

US5155492A Dual mode active aperture 失效
标题翻译：双模有效光圈
公开(公告)号：US5155492A
公开(公告)日：1992-10-13
申请号：US706664
申请日：1991-05-29
申请人： Francis W. Hopwood , Jerry A. Kane , Thomas R. Turlington , David S. Oros
发明人： Francis W. Hopwood , Jerry A. Kane , Thomas R. Turlington , David S. Oros
IPC分类号： G01S7/03 , H01Q3/28 , H01Q23/00
CPC分类号： H01Q3/28 , G01S7/03 , H01Q23/00
摘要： A dual mode active aperture phased array system for pulsed radar and continuous wave applications. The system may be switched between the two modes without appreciable loss of average effective radiated power. Both the voltage and current of the biasing power to the amplifying transistors is varied to accommodate the difference in peak amplitude power while maintaining the optimum average effective radiated power. The DC power supply is a chopper.
摘要翻译：一种用于脉冲雷达和连续波应用的双模有源孔径相控阵。系统可以在两种模式之间切换，而没有平均有效辐射功率的明显损失。改变放大晶体管的偏置功率的电压和电流是变化的，以适应峰值功率的差异，同时保持最佳平均有效辐射功率。直流电源是斩波器。

7. 发明授权

US5023572A Voltage-controlled oscillator with rapid tuning loop and method for tuning same 失效
标题翻译：具有快速调谐回路的压控振荡器及其调谐方法
公开(公告)号：US5023572A
公开(公告)日：1991-06-11
申请号：US453742
申请日：1989-12-20
申请人： Stephen P. Caldwell , David S. Korn , Francis W. Hopwood
发明人： Stephen P. Caldwell , David S. Korn , Francis W. Hopwood
IPC分类号： H03L7/085
CPC分类号： H03L7/085
摘要： An oscillator circuit is coupled to receive first and second reference signals and includes a voltage-controlled oscillator for generating an oscillating signal. A difference frequency calculation circuit is coupled to the voltage-controlled oscillator to produce a count signal corresponding to a difference in frequency between the oscillating signal and the first reference signal. A feedback circuit is coupled to the difference frequency calculation circuit and coupled to receive the second reference signal which corresponds to a predetermined frequency for the oscillating signal. The feedback circuit provides a control signal as an input to the voltage-controlled oscillator to control the frequency of the oscillating signal. The method for tuning the voltage-controlled oscillator which generates the oscillating signal includes a step of calculating a difference in frequency between the oscillating signal and a first reference signal, and generating a count signal corresponding to the difference in frequency. The count signal is compared to a reference count signal corresponding to a predetermined frequency for the oscillating signal, and an error signal is generated based on the results of the comparison. The error signal and a prepositioning signal corresponding to the predetermined frequency for the oscillating signal are added to generate a control signal which is provided to the voltage-controlled oscillator to control the frequency of the oscillating signal.
摘要翻译：振荡器电路被耦合以接收第一和第二参考信号，并且包括用于产生振荡信号的压控振荡器。差分频率计算电路耦合到压控振荡器以产生对应于振荡信号和第一参考信号之间的频率差的计数信号。反馈电路耦合到差分频率计算电路，并被耦合以接收对应于振荡信号的预定频率的第二参考信号。反馈电路提供控制信号作为压控振荡器的输入，以控制振荡信号的频率。用于调谐产生振荡信号的压控振荡器的方法包括计算振荡信号和第一参考信号之间的频率差的步骤，以及产生对应于频率差的计数信号。将计数信号与对应于振荡信号的预定频率的参考计数信号进行比较，并根据比较结果产生误差信号。加上对应于振荡信号的预定频率的误差信号和预定位信号，以产生提供给压控振荡器以控制振荡信号的频率的控制信号。

8. 发明授权

US4639688A Wide-band phase locked loop amplifier apparatus 失效
标题翻译：宽带锁相环放大器装置
公开(公告)号：US4639688A
公开(公告)日：1987-01-27
申请号：US724714
申请日：1985-04-18
申请人： Francis W. Hopwood , Stephen P. Caldwell , Martin J. Decker
发明人： Francis W. Hopwood , Stephen P. Caldwell , Martin J. Decker
IPC分类号： H03L7/081 , H03L7/00
CPC分类号： H03L7/081
摘要： A wide-band amplifier apparatus utilizing a low frequency and a high frequency phase lock loop to achieve low phase delay at the loop bandwidth. The bandwidth products of the low and high frequency loop paths are combined and applied to the voltage controlled oscillator to minimize phase delay and to achieve a more stable loop.
摘要翻译：利用低频和高频锁相环的宽带放大器装置在环路带宽上实现低相位延迟。将低频和高频环路径的带宽乘积组合并施加到压控振荡器，以最小化相位延迟并实现更稳定的环路。

9. 发明授权

US4586044A Clutter positioning for electronically agile multi-beam radars 失效
标题翻译：电子敏捷多光束雷达的杂波定位
公开(公告)号：US4586044A
公开(公告)日：1986-04-29
申请号：US460688
申请日：1983-01-24
申请人： Francis W. Hopwood , John W. Gipprich
发明人： Francis W. Hopwood , John W. Gipprich
IPC分类号： G01S7/282 , G01S13/524 , G01S13/52
CPC分类号： G01S13/5242 , G01S7/282
摘要： An electronically agile multi-beam radar including a clutter positioning system for positioning the band of clutter signals in the derived doppler frequency spectrum of each of the individual beams is disclosed. The radar is operative to switchedly transmit a plurality of beams directionally separated by time sharing the illuminating power thereof. Each beam includes at least one transmission of a plurality of R.F. pulses constituting a radar look. The radar is also operative to receive echo R.F. pulses of the look from each transmitted beam dispersed in time with echo R.F. pulses of the looks of the other transmitted beams of the plurality. The clutter positioning system operates to maintain substantially a desired pulse-to-pulse phase relationship for the received plurality of echo pulses of each look of each beam in a time-shared manner in order to derive a substantially representative pulse doppler spectrum of signals associated with each look of the transmitted beams and to adaptively position an identified group of clutter signals about a prespecified dopper frequency in a derived doppler frequency spectrum for each look of each beam. The clutter positioning system may be disposed in either the transmission portion or the reception portion of the radar in which case it effects substantially the desired pulse-to-pulse phase relationship at each transmitted or received R.F. pulsed beam, respectively.
摘要翻译：公开了一种电子敏捷多波束雷达，其包括用于将杂波信号带定位在每个单独波束的导出多普勒频谱中的杂波定位系统。该雷达可操作地切换地发射通过分享其照明功率的时间分配的多个光束。每个波束包括多个R.F.的至少一个传输。构成雷达外观的脉冲。雷达还可以接收回波R.F. 来自每个发射波束的外观的脉冲随时间分布在回波R.F. 多个其他发射波束的外观的脉冲。杂波定位系统以时间共享的方式操作以维持每个波束的每个外观的接收的多个回波脉冲的基本上期望的脉冲 - 脉冲相位关系，以便导出与...相关联的信号的基本上代表性的脉冲多普勒频谱发射波束的每个外观，并且针对每个波束的每个外观，自适应地将所识别的一组杂波信号定位在衍生多普勒频谱中的预先指定的掺杂频率。杂波定位系统可以设置在雷达的发射部分或接收部分中，在这种情况下，它们在每个发射或接收的R.F.基本上实现所需的脉冲到脉冲相位关系。脉冲束。

10. 发明授权

US4099137A High speed phase lock control for frequency switching 失效
标题翻译：用于频率切换的高速锁相控制
公开(公告)号：US4099137A
公开(公告)日：1978-07-04
申请号：US805498
申请日：1977-06-10
申请人： Benjamin C. Alm, Jr. , Francis W. Hopwood , Robert A. Jelen , John P. Muhlbaier , Joseph F. Wright, Jr.
发明人： Benjamin C. Alm, Jr. , Francis W. Hopwood , Robert A. Jelen , John P. Muhlbaier , Joseph F. Wright, Jr.
IPC分类号： G01S7/28 , H03L7/189 , H03B3/08
CPC分类号： H03L7/189 , G01S7/28
摘要： A digitally controlled microwave phase lock loop for switching rapidly from one lock frequency to another is disclosed. A digital word corresponding to a desired input voltage for a selected frequency is converted to an analog voltage for application to the coarse tuning port of the loop's voltage controlled oscillator. Prior to switching to another frequency, the error voltage for the fine tuning port is compared with a zero error reference voltage. The least significant bit of the digital word for such frequency is increased or decreased by one depending on the direction difference between the compared voltages. This incrementally changed word controls the coarse tuning voltage during the next selection of the particular frequency. The system is initialized by repetitively selecting each of the possible frequencies until the digital word for each selected frequency is within one increment of the zero error reference voltage for the fine tuning port.
摘要翻译：公开了一种用于从一个锁定频率快速切换到另一个锁定频率的数字控制的微波相位锁定环。对应于所选频率的期望输入电压的数字字转换为模拟电压，以供应给环路压控振荡器的粗调端口。在切换到另一个频率之前，将微调端口的误差电压与零误差参考电压进行比较。这种频率的数字字的最低有效位根据所比较的电压之间的方向差增加或减小一个。这个增量变化的字在下一次特定频率的选择期间控制粗调谐电压。通过重复选择每个可能的频率来初始化系统，直到每个选定频率的数字字都在微调端口的零误差参考电压的一个增量内。

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