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公开(公告)号：US4998110A
公开(公告)日：1991-03-05
申请号：US376320
申请日：1989-07-06
申请人： John W. Davis
发明人： John W. Davis
CPC分类号： G01S7/023 , G01S13/931 , G01S7/034 , H01P5/181 , G01S2013/9339 , G01S2013/9346 , G01S2013/9357 , G01S2013/9375
摘要： The invention is directed to a directional coupler for coupling together a radar frequency transmitter to a combined transmitting and receiving antenna, a power absorber and a receiver. A tunable stub is employed to reflect a selected amount of transmitted energy to the local oscillator (LO) of the receiver for mixing with the incoming received signal. The coupler can be constructed from any known type RF transmission line suitable for passing or coupling signals of radar frequencies. A significant amount of the transmitter power is absorbed in a power absorbing RF load allowing only a small amount to be transmitted from the antenna and a still smaller amount fed back as LO to the receiver. The invention works equally as well on a disk type antenna and a phased array antenna.
摘要翻译： 本发明涉及一种定向耦合器，用于将雷达频率发射机耦合到组合的发射和接收天线，功率吸收器和接收器。 采用可调谐短截线将选定量的发射能量反射到接收机的本地振荡器（LO），以与输入的接收信号混合。 耦合器可以由适用于通过或耦合雷达频率信号的任何已知类型的RF传输线构成。 大量的发射机功率被吸收在功率吸收RF负载中，从而允许从天线发射少量的量，并且将更小量的LO作为LO反馈给接收机。 本发明在圆盘型天线和相控阵天线方面同样适用。
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公开(公告)号：US4916450A
公开(公告)日：1990-04-10
申请号：US193393
申请日：1988-05-12
申请人： John W. Davis
发明人： John W. Davis
CPC分类号： G01S7/023 , G01S13/931 , G01S2013/9325 , G01S2013/9339 , G01S2013/9346 , G01S2013/9353 , G01S2013/9357 , G01S2013/9375
摘要： A radar system for monitoring the headway control distance between a vehicle equipped with a radar system of the present invention and a fixed or moving object of immediate concern in front thereof. The system employs an antenna positioned in front of the vehicle, transmitter and receiver circuits and signal processing circuits. A transmitted signal from the transmitter circuit when reflected back from an object of immediate concern is received by the receiver circuit and fed into conditioning circuits which separate the received signal into controlling signals that include the range or distance (R) to a detected object of concern, the closing rate (CR) to that object and the vehicle speed of movement (VS). Driving condition modifiers (.+-.DM) such as traffic conditions and weather conditions, the level of which are manually chosen by the operator of the vehicle are combined with the received signals to constantly provide changing signals to dynamically determine a hazard level (HZL) which is compared to a preset reference level to 2 according to the mathematical formula or algorithm HZL=R+CR+VS.+-.DM. The DMs, which combined collectively with define or replicate the operator's perceived safe drive conditions.
摘要翻译： 一种雷达系统，用于监视配备有本发明的雷达系统的车辆与其前方立即关注的固定或移动物体之间的车距控制距离。 该系统采用位于车辆前面的天线，发射器和接收器电路和信号处理电路。 当从直接关注的物体反射回来时，来自发射机电路的发送信号被接收机电路接收并馈送到调节电路，该调理电路将包含范围或距离（R）的控制信号分离成检测到的关注物体 ，该物体的关闭率（CR）和车辆速度（VS）。 驾驶状况调节器（+/- DM），如交通状况和天气条件，其水平由车辆的操作者手动选择，与接收的信号相结合，以不断提供变化的信号，动态地确定危险等级（HZL） 根据数学公式或算法HZL = R + CR + VS +/- DM将其与预设参考电平进行比较为2。 DM集合在一起定义或复制了操作者感觉到的安全驾驶条件。
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公开(公告)号：US4042934A
公开(公告)日：1977-08-16
申请号：US584109
申请日：1975-06-05
申请人： John W. Davis
发明人： John W. Davis
摘要： A doppler radar module consisting of transmitting and receiving diodes disposed within adjacent sections of wave guide with the transmitter diode disposed a half wave length away from a shorting end of the transmitter section of wave guide, and a receiver diode disposed a quarter wave from a shorting end of the receiver portion of the guide. The receiver section and the transmitter section of the wave guides being separated by a common wall; coupling aperture disposed in the common wall substantially one wave length from the end of the transmitter section of wave guide for coupling a small portion of transmitter energy into the receiver portion of wave guide and for coupling substantially all reflected energy into the wave guide section.
摘要翻译： 多普勒雷达模块由发射和接收二极管组成，发射和接收二极管布置在波导的相邻部分内，发射二极管设置在离波导发射器部分的短路端的一半波长处，以及接收器二极管，从短路 引导件的接收器部分的末端。 波导的接收器部分和发射器部分被公共墙分隔开; 耦合孔布置在公共壁中，基本上一个波长从波导的发射器部分的端部，用于将一小部分发射器能量耦合到波导的接收器部分中，并且用于将基本上所有的反射能量耦合到波导部分中。
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