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公开(公告)号：US6020854A
公开(公告)日：2000-02-01
申请号：US86638
申请日：1998-05-29
摘要： An antenna for utilization in a fuse of an artillery shell is disclosed. The antenna comprises a radiator, a capacitance hat disposed at a first end of the radiator for capacitively loading the radiator and a ground plane disposed at a second end of the radiator such that the antenna is a monopole antenna. The antenna also includes a dielectric having a top surface, a bottom surface and a central longitudinal axis wherein the capacitance hat is disposed on the top surface of the dielectric and the ground plane is disposed on the bottom surface of the dielectric. A fuse utilized for detonating the explosive charge of an artillery shell is further disclosed. The fuse includes a fuse casing with the antenna of the present invention disposed within the interior cavity of the fuse casing.
摘要翻译： 公开了一种用于在炮弹的保险丝中使用的天线。 天线包括散热器，设置在散热器的第一端的电容帽，用于电容性地加载散热器，以及设置在散热器的第二端处的接地平面，使得天线是单极天线。 天线还包括具有顶表面，底表面和中心纵轴的电介质，其中电容帽设置在电介质的顶表面上，接地平面设置在电介质的底表面上。 进一步公开了用于引爆炮弹的炸药的保险丝。 保险丝包括具有本发明的天线的保险丝壳体，其设置在保险丝壳体的内部空腔内。
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公开(公告)号：US6140958A
公开(公告)日：2000-10-31
申请号：US866612
申请日：1997-05-30
CPC分类号： G01S19/32 , G01S19/15 , G01S5/0027 , G01S5/0045 , G01S19/41
摘要： A system for monitoring guiding and controlling an unmanned, unteathered flight vehicle, generally assumed to be moving through the earth's atmosphere at a high rate of speed. The system is comprised of on-board positional receiver and processing means coupled to a transceiver capable of combining such positional information with additional data relative to the health and status of the flight vehicle and transmitting the same to a ground station of compatible and simplified design. A preferred positional determination means is to utilize a form for GPS signal thereby affording one the opportunity to include appropriate processing software or additional componentry if necessary for base station purposes and thereby provide a relatively inexpensive system having a low probability of detection for intercept that simultaneously yields vastly improved operating performance characteristics over the mere translation of received GPS signals to down-link or to remote stations as known in the prior art.
摘要翻译： 一种用于监控指导和控制无人驾驶飞机的系统，通常假定它们以高速率通过地球大气层。 该系统包括车载位置接收器和耦合到收发器的处理装置，该收发器能够将这种位置信息与相对于飞行器车辆的健康状况和状态的附加数据组合，并将其发送到兼容和简化设计的地面站。 优选的位置确定装置是利用一种用于GPS信号的形式，从而提供一个机会，以便在基站目的需要时包括适当的处理软件或附加组件，从而提供一种相对便宜的系统，其具有低的拦截概率，同时产生 如现有技术中已知的，将接收到的GPS信号简单地转换为下行链路或远程站的操作性能特征大大改善。
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公开(公告)号：US5940027A
公开(公告)日：1999-08-17
申请号：US940634
申请日：1997-09-30
CPC分类号： G01S19/235 , G04G3/022 , H03L1/027
摘要： A global positioning system (GPS) receiver and high accuracy low power time source (HAL) are disclosed. The HAL provides a time source having an accuracy which is high enough for the receiver to achieve fast direct Y-code acquisition. The HAL includes an oscillator adapted to provide an uncompensated frequency signal at a desired frequency. Frequency conversion circuitry receives the uncompensated frequency signal and a control signal as inputs, and provides as an output a compensated frequency signal having an average compensated frequency which is closer to the desired frequency than is the average uncompensated frequency. A temperature sensor provides an output indicative of a temperature of the oscillator. Frequency error determining circuitry determines an error value, as a function of the temperature sensor output, which is indicative of a quantity of frequency error over time in the uncompensated frequency signal. The frequency error determining circuitry generates the control signal as a function of the determined quantity of frequency error in the uncompensated frequency signal. A counter receives the compensated frequency signal from the frequency conversion circuitry and provides as an output a digital representation of a time period based upon the compensated frequency signal.
摘要翻译： 公开了一种全球定位系统（GPS）接收机和高精度低功率时间源（HAL）。 HAL提供了具有足够高的准确度的时间源，用于接收机实现快速的直接Y码采集。 HAL包括适于以期望的频率提供未补偿的频率信号的振荡器。 频率转换电路接收未补偿的频率信号和控制信号作为输入，并且提供具有平均补偿频率的补偿频率信号作为输出，其平均补偿频率比平均未补偿频率更接近期望频率。 温度传感器提供指示振荡器的温度的输出。 频率误差确定电路确定作为温度传感器输出的函数的误差值，其表示在未补偿的频率信号中随时间的频率误差量。 频率误差确定电路根据所确定的未补偿频率信号中的频率误差量产生控制信号。 计数器从频率转换电路接收经补偿的频率信号，并根据经补偿的频率信号提供时间周期的数字表示作为输出。
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公开(公告)号：US4468784A
公开(公告)日：1984-08-28
申请号：US418494
申请日：1982-09-15
申请人： Paul G. Jagnow , David K. Vail
发明人： Paul G. Jagnow , David K. Vail
IPC分类号： H04B1/7085 , H04B1/10
CPC分类号： H04B1/7085
摘要： A mixer-driver circuit in a code correlator of a spread-spectrum communications system simultaneously multiplies an input RF signal with two phase-offset digitally encoded bit streams. A double-balanced mixer is driven with the difference of the digital signals; the mixer is either inverting, noninverting, or off. Matched ECL bistables which reclock the phase-offset bit streams, and a load current steering circuit coupled to the bistables together provide a balanced, differential drive current to the mixer which switches state faster than the bistables alone. In another embodiment, a single bistable receiving an encoded bit stream differentially drives the mixer in a biphase circuit.
摘要翻译： 扩频通信系统的码相关器中的混频器驱动器电路同时将输入RF信号与两个相位偏移数字编码比特流相乘。 双平衡混频器由数字信号的差异驱动; 混频器是反相，同相或关闭。 重新锁定相位偏移位流的匹配ECL双稳态和耦合到双稳态的负载电流控制电路一起为混合器提供平衡的差分驱动电流，该混合器比单独的双稳态开关状态更快。 在另一个实施例中，单个双稳态接收编码比特流在双相电路中差分地驱动混频器。
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公开(公告)号：US4385401A
公开(公告)日：1983-05-24
申请号：US153226
申请日：1980-05-27
申请人： Paul G. Jagnow , David K. Vail
发明人： Paul G. Jagnow , David K. Vail
IPC分类号： H04B1/7085 , H04B1/709 , H04B1/10
CPC分类号： H04B1/7085 , H04B1/709
摘要： A mixer-driver circuit in a code correlator of a spread-spectrum communications system simultaneously multiplies an input RF signal with two phase-offset digitally encoded bit streams. A double-balanced mixer is driven with the difference of the digital signals; the mixer is either inverting, noninverting, or off. Matched ECL bistables which reclock the phase-offset bit streams, and a load current steering circuit coupled to the bistables together provide a balanced, differential drive current to the mixer which switches state faster than the bistables alone. In another embodiment, a single bistable receiving an encoded bit stream differentially drives the mixer in a biphase circuit.
摘要翻译： 扩频通信系统的码相关器中的混频器驱动器电路同时将输入RF信号与两个相位偏移数字编码比特流相乘。 双平衡混频器由数字信号的差异驱动; 混频器是反相，同相或关闭。 重新锁定相位偏移位流的匹配ECL双稳态和耦合到双稳态的负载电流控制电路一起为混合器提供平衡的差分驱动电流，该混合器比单独的双稳态开关状态更快。 在另一个实施例中，单个双稳态接收编码比特流在双相电路中差分地驱动混频器。
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