公开(公告)号：US5982321A

公开(公告)日：1999-11-09

申请号：US99021

申请日：1998-06-17

申请人： Akira Iihoshi ,  Jou Kojima

发明人： Akira Iihoshi ,  Jou Kojima

IPC分类号： G01S7/41 ,  G01S13/34 ,  G01S13/42 ,  G01S13/93 ,  G01S13/06

CPC分类号： G01S13/34 ,  G01S13/42 ,  G01S2013/9375 ,  G01S7/411

摘要： An FM signal generator generates a frequency-swept FM signal, which is radiated as a beam from a transmission and reception antenna. The transmission and reception antenna is angularly moved by an antenna actuator to scan the beam. An echo signal reflected from a target and a signal related to the frequency-swept FM signal are mixed into a beat signal, whose frequency spectrum is analyzed by a frequency analyzer. A target detector determines the distance up to the target based on the frequency spectrum of the beat signal. A BPF processor comprises a bandpass filter which extracts a frequency component corresponding to the distance up to the target from the beat signal. A bearing calculator compares the level of a signal that has passed through the BPF processor with a threshold level to determine a bearing and a width of the target.

摘要翻译： FM信号发生器产生频率扫描的FM信号，其被发射为来自发射和接收天线的波束。 发射和接收天线由天线致动器角度地移动以扫描光束。 从目标反射的回波信号和与频率扫描的FM信号相关的信号被混合到拍频信号中，其频谱由频率分析器分析。 目标检测器基于拍频信号的频谱确定到达目标的距离。 BPF处理器包括带通滤波器，其从拍子信号中提取对应于距离目标的距离的频率分量。 轴承计算器将通过BPF处理器的信号的电平与阈值水平进行比较，以确定目标的方位和宽度。

公开(公告)号：US5652589A

公开(公告)日：1997-07-29

申请号：US554677

申请日：1995-11-07

申请人： Hideaki Ono ,  Jou Kojima

发明人： Hideaki Ono ,  Jou Kojima

IPC分类号： G01S7/02 ,  G01S13/00 ,  G01S13/34 ,  G01S13/42 ,  G01S13/60 ,  G01S13/87 ,  G01S13/93 ,  G01S13/08

CPC分类号： G01S13/345 ,  G01S13/003 ,  G01S13/42 ,  G01S13/87 ,  G01S2013/9375

摘要： An FM-CW multibeam radar apparatus includes a plurality of antennas designed to serve both for beam transmission and receiving are arranged in such a manner that radiated beams overlap in part with each other. For sensing a short-distance-away target, a beam is transmitted by means of one of the antennas and a reflected beam is received by a separate adjacent one of the antennas to thereby obtain a beat signal. For sensing a long-distance-away target, one and the same beam transmitter-receiver is used. Upon sensing the short-distance-away target, the per-unit-time amount of change of the frequency of a frequency modulated transmitted signal is set to be larger than that for sensing the long-distance-away target so that a beat signal becomes higher, whereby the distance resolution is improved.

摘要翻译： FM-CW多波束雷达装置包括被设计成用于波束传输和接收的多个天线，其布置成使得辐射波束彼此部分重叠。 为了感测短距离目标，通过天线中的一个发射波束，并且由天线中的单独的相邻天线接收反射波束，从而获得拍频信号。 为了感测远距离目标，使用同一个波束发射机 - 接收机。 在感测短距离目标时，频率调制发射信号的每单位时间的频率变化量被设置为大于用于感测远距离目标的频率的变化量，使得拍频信号变为 更高，从而提高了距离分辨率。

公开(公告)号：US6034642A

公开(公告)日：2000-03-07

申请号：US961518

申请日：1997-10-30

申请人： Jou Kojima ,  Ken-I-Chi Tohya ,  Naoto Yamamoto

发明人： Jou Kojima ,  Ken-I-Chi Tohya ,  Naoto Yamamoto

IPC分类号： H01Q3/16 ,  G01S7/02 ,  G01S7/03 ,  G01S13/93 ,  H01Q3/20 ,  H01Q19/06

CPC分类号： H01Q3/20 ,  G01S13/931 ,  G01S2013/9353 ,  G01S2013/9375 ,  G01S2013/9389

摘要： An antenna apparatus for use as in an automobile collision warning system has a primary radiator for radiating a high-frequency radio wave beam, a reflecting member for reflecting the radio wave beam, an actuating mechanism for actuating the reflecting member, and a lens such as a dielectric lens for converging the radio wave beam reflected by the reflecting member to reduce an angle of divergence of the radio wave beam.

摘要翻译： 用于汽车碰撞警告系统的天线装置具有用于照射高频无线电波束的初级辐射器，用于反射无线电波束的反射部件，用于致动反射部件的致动机构，以及诸如 用于会聚由反射构件反射的无线电波束的介电透镜，以减小无线电波束的发散角。