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1. 发明授权

US4040055A Digital compensator for transmitter instability 失效
标题翻译：用于发射机不稳定性的数字补偿器
公开(公告)号：US4040055A
公开(公告)日：1977-08-02
申请号：US488726
申请日：1974-07-15
申请人： Thomas H. Donahue , David E. Hammers
发明人： Thomas H. Donahue , David E. Hammers
IPC分类号： G01S7/288 , G01S9/42
CPC分类号： G01S7/288
摘要： A digital compensator for radar transmitter instabilities for use in a digital MTI system. The I and Q coherent phase detector outputs are continuously monitored for phase, amplitude and timing instabilities and arithmetic correction signals are generated and applied to the digitized received signal values to compensate for these instabilities which are particularly characteristic of pulsed magnetron transmitters, for example.

2. 发明授权

US5471220A Integrated adaptive array antenna 失效
标题翻译：集成自适应阵列天线
公开(公告)号：US5471220A
公开(公告)日：1995-11-28
申请号：US198410
申请日：1994-02-17
申请人： David E. Hammers , Michael D. Conway
发明人： David E. Hammers , Michael D. Conway
IPC分类号： H01Q21/00 , H01Q3/24
CPC分类号： H01Q21/0087 , H01Q21/0025
摘要： An integrated active array antenna system is disclosed which comprises a "sandwich style" microwave packaging scheme that includes three principal layers: an antenna layer, a transceiver layer, and a beam forming sub array layer. These three layers are arranged in a coplanar geometry, with connections between the layers being in the form of microwave vias. Each transceiver module may be implemented in the form of a single Monolithic Microwave Integrated Circuit, and each beam forming sub array may be similarly implemented. The coplanar geometry and use of Monolithic Microwave Integrated Circuit technology provide for multi-beam active array of very shallow physical depth.
摘要翻译：公开了一种集成的有源阵列天线系统，其包括“三明治式”微波封装方案，其包括三个主要层：天线层，收发器层和波束形成子阵列层。这三层被布置成共面几何形状，层之间的连接是微波通孔的形式。每个收发器模块可以以单个单片微波集成电路的形式实现，并且每个波束形成子阵列可以类似地实现。单片微波集成电路技术的共面几何和使用提供了非常浅的物理深度的多光束有源阵列。

3. 发明授权

US4339754A Spatially adaptive moving target indicator system for radar equipment 失效
标题翻译：雷达设备空间自适应移动目标指标系统
公开(公告)号：US4339754A
公开(公告)日：1982-07-13
申请号：US972736
申请日：1978-12-26
申请人： David E. Hammers , John M. Milan
发明人： David E. Hammers , John M. Milan
IPC分类号： G01S13/52
CPC分类号： G01S13/52
摘要： A radar system is provided with first and second moving target indicator (MTI) systems. The first MTI system generally works better against ground clutter than against sky clutter. The second MTI system works well against sky clutter but generally requires a greater number of radar return echoes to discern targets in the sky clutter. A correlation estimation circuit is employed to calculate the correlation of clutter-like return echoes not suppressed by the first MTI system. If the return echoes are sufficiently correlated, the second MTI system is invoked against the clutter. If the return echoes are less well correlated, on the other hand, then electronic counter-counter measure systems may be invoked.
摘要翻译：雷达系统配备有第一和第二移动目标指示器（MTI）系统。第一个MTI系统通常比反对天空杂乱地更好地抵抗地面混乱。第二个MTI系统能够很好地对抗天空混乱，但通常需要更多的雷达回波回波来识别天空杂乱的目标。使用相关估计电路来计算未被第一MTI系统抑制的杂波状返回回波的相关性。如果返回回波充分相关，则第二个MTI系统被调用来抵消杂乱。另一方面，如果返回回波不太相关，则可以调用电子对抗措施系统。

4. 发明授权

US4042925A Pseudo-random code (PRC) surveilance radar 失效
标题翻译：伪随机码（PRC）监视雷达
公开(公告)号：US4042925A
公开(公告)日：1977-08-16
申请号：US634890
申请日：1975-11-24
申请人： Damian F. Albanese , Frank J. O'Farrell , David E. Hammers , Henry R. Kennedy
发明人： Damian F. Albanese , Frank J. O'Farrell , David E. Hammers , Henry R. Kennedy
IPC分类号： G01S13/10 , G01S13/32 , G01S13/58 , G01S9/23 , G01S9/24
CPC分类号： G01S13/582 , G01S13/106 , G01S13/325
摘要： A CW pseudo-random-coded (PRC) radar system including a triple-clock arrangement. The three slightly different clock frequencies are sequentially employed to generate the bi-phase coded RF transmissions and the received echo signals are separately bi-phase de-modulated by code bit. Clutter filtering and sampling in both I and Q channels by a commutating element are employed. Video processing, preferably of the FFT type, is provided as is range-ambiguity processing. The system provides resolution of range ambiguities over a long total range permitting the PRC word length and other system parameters to be optimized for elimination of Doppler ambiguities.
摘要翻译：包括三时钟排列的CW伪随机编码（PRC）雷达系统。顺序地使用三个稍微不同的时钟频率来产生双相编码的RF传输，并且接收到的回波信号由码位分开进行双相解调。采用通过换向元件在I和Q通道中进行杂波滤波和采样。视频处理，优选为FFT类型，被提供为范围模糊处理。该系统在长的总范围内提供范围模糊度的分辨率，允许优化中文字长和其他系统参数以消除多普勒模糊度。

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