公开(公告)号：US3875569A

公开(公告)日：1975-04-01

申请号：US46796674

申请日：1974-05-08

申请人： HUGHES AIRCRAFT CO

发明人： HILL RICHARD M ,  KRAMER DAVID A ,  MAKINO ROY H

IPC分类号： G01S7/28 ,  G01S7/292 ,  G01S9/02

CPC分类号： G01S7/2813 ,  G01S7/2921

摘要： In an airborne radar system of the type including a main high gain narrow beamwidth antenna and a guard low gain wide beamwidth antenna with main and guard receiver channels, a detection system based on separately thresholding the outputs of both channels and their ratio. Mainlobe target detection is assumed to occur only when either the output of the main channel exceeds a main threshold level and the output of the guard channel does not exceed a guard threshold level or when the outputs of the two channels exceed their respective thresholds and the ratio (or the difference) of the outputs from the two channels exceed a ratio threshold level. The main and guard threshold levels are generated as a function of the background noise levels in the two channels.

摘要翻译： 在包括主高增益窄波束宽带天线和具有主和保护接收机信道的保卫低增益宽波束宽带天线的机载雷达系统中，基于对两个信道的输出及其比率进行单独阈值处理的检测系统。 假设主瓣目标检测仅在主信道的输出超过主阈值电平且保护信道的输出不超过保护阈值电平时或者当两个信道的输出超过它们各自的阈值且比率 来自两个通道的输出的（或差）超过比率阈值水平。 作为两个通道中的背景噪声电平的函数产生主和保护阈值电平。

公开(公告)号：US3866219A

公开(公告)日：1975-02-11

申请号：US37685873

申请日：1973-07-05

申请人： HUGHES AIRCRAFT CO

发明人： KRAMER DAVID A ,  LAVAS GEORGE P

IPC分类号： G01S1/02 ,  G01S13/10 ,  G01S13/68 ,  G01S19/35 ,  G01S9/02 ,  G01S7/28

CPC分类号： G01S13/68 ,  G01S1/02 ,  G01S13/106

摘要： In an acquisition radar system of the type in which the antenna scans in a multiple-bar raster scan pattern, signals of different sets of characteristics, e.g., different PRF''s, are transmitted on adjacent bars. The elevation bar spacing is chosen to be less than 0.5 X theta b where theta b is the antenna 3dB elevation beamwidth so that any target within the pattern is illuminated by the signals of the different PRF''s.

摘要翻译： 在天线以多条光栅扫描图案扫描的类型的采集雷达系统中，在相邻的条上传输不同特征集合的信号，例如不同的PRF。 升降杆间距选择为小于0.5 xθb，其中θb是天线3dB仰角波束宽度，使得图案中的任何目标被不同PRF的信号照亮。