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    • 1. 发明授权
    • Location and velocity measurement system using atomic clocks in moving
objects and receivers
    • 位置和速度测量系统在移动物体和接收器中使用原子钟
    • US5696514A
    • 1997-12-09
    • US608424
    • 1996-02-28
    • Harvey C. NathansonCharles W. Einolf, Jr.James L. McShaneElbert L. Cole, Jr.
    • Harvey C. NathansonCharles W. Einolf, Jr.James L. McShaneElbert L. Cole, Jr.
    • G01S5/06G01S11/10G01S13/91G01S13/06
    • G01S11/10G01S5/06G01S13/91
    • A coherent signal generated at a precise frequency determined by an atomic clock is transmitted by a moveable object. A receiver station compares the frequency of the coherent signal received from the moving object with a second coherent signal generated at the same precise frequency by an atomic clock in the receiver to determine the radial component of the velocity of the moveable object relative to the receiver as a function of the doppler shift of the transmitted signal. Low cost, low power, miniature atomic clocks with an accuracy of 10.sup.-11 make possible accurate measurements of velocities of only centimeters per second. Such velocity measurement can be used to enhance radar tracking in air traffic control and collision avoidance systems. These velocity measurements can also be used to resolve tracking ambiguities in precision location systems, such as prisoner, geriatric and airport ground control systems, where three or more receiver stations each having an atomic clock measure time of flight of the transmitted coherent signal to triangulate moving object position.
    • 以由原子钟确定的精确频率产生的相干信号由可移动物体传输。 接收机站将从移动物体接收的相干信号的频率与在接收机中以原子钟相同的精确频率产生的第二相干信号进行比较,以确定可移动物体相对于接收机的速度的径向分量, 发射信号的多普勒频移的功能。 低成本,低功耗,精度为10-11的微型原子钟可以准确测量每秒钟厘米的速度。 这种速度测量可用于加强空中交通管制和防撞系统中的雷达跟踪。 这些速度测量还可用于解决精确定位系统(如囚犯,老人和机场地面控制系统)中的跟踪模糊度,其中三个或更多个接收器站各自具有原子钟测量传输的相干信号的飞行时间以三角测量 对象位置。
    • 3. 发明授权
    • Broadband microwave integrated circuit amplifier with capacitive
neutralization
    • 宽带微波集成电路放大器采用电容中和
    • US5355095A
    • 1994-10-11
    • US838971
    • 1992-02-21
    • Harvey C. NathansonRichard J. Ravas
    • Harvey C. NathansonRichard J. Ravas
    • H03F3/18H03F3/26
    • H03F3/265
    • Push-pull complimentary MOSFET devices are formed in a thin active layer between the top surface of a high resistivity silicon wafer and a insulating layer implanted below the top surface. Each MOSFET is composed of a plurality of cells each having a source, a gate, and a drain region extending fully through the active layer. Grooves extending through the wafer are lined with vias which connect the source regions with a floating ground plane on the bottom of the wafer. The gates of all the cells are connected by a gate bus on the top surface. Air bridges spanning the gates and the source vias connect the drain conductors of each cell. Neutralizing capacitors connected between an input and an opposite output of the push-pull complimentary MOSFET devices match the parasitic capacitances of the devices and provide wide bandwidth amplification with roll off well into the GHz range without the need for tuning inductors.
    • 推挽互补MOSFET器件形成在高电阻率硅晶片的顶表面和植入在顶表面下方的绝缘层之间的薄的有源层中。 每个MOSFET由多个单元组成,每个单元具有完全延伸穿过有源层的源极,栅极和漏极区域。 延伸穿过晶片的沟槽衬有通孔,其将源区域与晶片底部上的浮动接地平面连接。 所有电池的栅极通过顶部表面上的栅极总线连接。 跨过门和源通孔的空气桥连接每个电池的漏极导体。 连接在推挽互补MOSFET器件的输入端和反相输出端之间的中和电容器与器件的寄生电容相匹配,并提供宽带宽放大,无需调谐电感器即可滚动到GHz范围内。
    • 7. 发明授权
    • Multi-mode missile seeker system
    • 多模式导弹探测系统
    • US5061930A
    • 1991-10-29
    • US536924
    • 1990-06-12
    • Harvey C. NathansonThomas E. Underwood
    • Harvey C. NathansonThomas E. Underwood
    • F41G7/22
    • F41G7/2246F41G7/224F41G7/2286
    • A broad band multimode seeker system for a missile includes a wide band phased array transmitter/receiver unit incorporating a wafer scale phased array device with a bandwidth of about 2 GHz to 35 GHz. A multimode intermediate frequency unit selectively generates radar and jamming waveforms and measures parameters of reflected radar and external emissions of RF energy. A guidance processor manages the front end assets for selective active or semiactive radar searching and tracking, and simultaneous searching for, tracking of, homing on, and applying a selection of electronic countermeasures to, multiple defensive radars. Confirmation of an assigned target is made through correlation of received RF signals with libraries of expected defensive system parameters and high resolution target profiles and preloaded target geographical coordinates.
    • 用于导弹的宽带多模探头系统包括宽带相控阵发射器/接收器单元,其包括具有约2GHz至35GHz的带宽的晶片级相控阵列器件。 多模中频单元选择性地产生雷达和干扰波形,并测量反射雷达的参数和RF能量的外部发射。 引导处理器管理用于选择性主动或半主动雷达搜索和跟踪的前端资产,以及多个防御雷达的同时搜索,跟踪,归位和应用选择的电子对策。 通过将接收到的RF信号与预期的防御系统参数和高分辨率目标轮廓和预加载的目标地理坐标的库进行相关来确定分配的目标。
    • 8. 发明授权
    • Transmit-receive means for phased-array active antenna system using rf
redundancy
    • 发射接收装置,用于使用rf冗余的相控阵有源天线系统
    • US4823136A
    • 1989-04-18
    • US13490
    • 1987-02-11
    • Harvey C. NathansonMichael C. DriverMichael W. CresswellRonald G. FreitagDonald K. AlexanderDaniel F. Yaw
    • Harvey C. NathansonMichael C. DriverMichael W. CresswellRonald G. FreitagDonald K. AlexanderDaniel F. Yaw
    • G01S7/03H01Q3/26H01Q21/00H01Q23/00
    • H01Q21/0025G01S7/032H01Q3/26
    • An improved phased-array active antenna transmit-receive means utilizing a multiplicity of individual transmit-receive cells positioned in an array format upon a common wafer of semiconductor material. Each transmit-receive cell, comprises a multiplicity of redundant, integrated circuit, electronic devices implanted upon the common semiconductor substrate. The transmit-receive cells utilize novel mitered mechanical switches to permanently interconnect individual electronic devices into either transmit or receive circuits during the fabrication and test of the transmit-receive cells. Radio frequency and direct current input and output vias formed from a novel metal evaportion technique connect the devices upon the surface of the common semiconductor wafer to underlying, insulated direct current distribution circuits and a radio frequency manifold. This array of improved phased-array active antenna transmit-receive means comprised of transmit-receive cells sharing common central processing means, logic control and heat dissipation means results in a significant reduction in the size and weight of the standard phased-array active antenna system. This significant reduction in antenna system size and weight is very important in broad band electronic countermeasure systems or narrow band phased array active antenna radar systems as used in advanced tactical fighters, or space applications.
    • 一种改进的相控阵有源天线发射 - 接收装置,利用位于半导体材料的公共晶片上的阵列格式的多个单独的发射 - 接收单元。 每个发射 - 接收单元包括多个冗余的集成电路,注入到公共半导体衬底上的电子器件。 发射接收蜂窝小区利用新颖的倾斜机械开关,在发射接收小区的制造和测试期间,将各个电子设备永久地互连到发射或接收电路中。 由新型金属蒸发技术形成的射频和直流输入和输出通孔将公共半导体晶片的表面上的器件连接到下面的绝缘直流分配电路和射频歧管。 由共享公共中央处理装置,逻辑控制和散热装置的发射 - 接收单元组成的改进的相控阵有源天线发射 - 接收装置阵列导致标准相控阵有源天线系统的尺寸和重量的显着降低 。 天线系统尺寸和重量的显着降低对于在高级战术战机或空间应用中使用的宽带电子对抗系统或窄带相控阵有源天线雷达系统是非常重要的。