公开(公告)号：US5164734A

公开(公告)日：1992-11-17

申请号：US774040

申请日：1991-10-07

Applicant: Duane G. Fredericks ,  Herbert W. Rosebrock

Inventor： Duane G. Fredericks ,  Herbert W. Rosebrock

IPC: G01S7/40 ,  G01S13/76 ,  G01S13/78 ,  G01S13/91 ,  H01Q3/26

CPC classification number: G01S7/4052 ,  G01S13/767 ,  G01S13/78 ,  G01S13/913 ,  H01Q3/2682 ,  G01S2007/4095

Abstract: An active radar target device is disclosed. This device contains a means receiving a radar signal, a means for decreasing the frequency of the radar signal received, at least one means for delaying the reduced frequency radar signal, means for increasing the frequency of the delayed signal, and means of modulating the delayed signal. The modulated and delayed signal is transmitted to an antenna, from which it may be radiated to a radar detector.

Abstract translation: 公开了一种主动雷达目标装置。 该装置包括接收雷达信号的装置，用于降低接收的雷达信号的频率的装置，用于延迟降频雷达信号的装置，用于增加延迟信号的频率的装置，以及调制延迟的信号的装置 信号。 调制和延迟的信号被发送到天线，从天线可以将其辐射到雷达检测器。

公开(公告)号：US4972192A

公开(公告)日：1990-11-20

申请号：US431939

申请日：1989-11-06

Applicant: Joesph A. Bruder

Inventor： Joesph A. Bruder

IPC: G01S7/40 ,  G01S13/50

CPC classification number: G01S13/50 ,  G01S7/4052 ,  G01S2007/4095

Abstract: A constant amplitude Doppler producing radar reflector for simulating a moving target. A plurality of dihedral reflectors having equal radar cross sections are rotated axially at equal rotational speeds. The dihedral reflectors are separated laterally and in the direction towards the illuminating radar by a distance which keeps the radar returns from the two reflectors in phase quadrature. With the radar cross sections of the reflectors being equal, the return signals to a linearly polarized radar maintains constant amplitude as the dihedral reflectors rotate.

Abstract translation: 用于模拟移动目标的恒定幅度多普勒产生雷达反射器。 具有相等雷达横截面的多个二面反射器以相等的转速轴向旋转。 二面反射器横向和朝着照明雷达的方向分开一段距离，使得雷达从相位正交的两个反射器返回。 由于反射器的雷达横截面相等，因此当二面反射器旋转时，向线性偏振雷达的返回信号保持恒定的振幅。

公开(公告)号：US4625209A

公开(公告)日：1986-11-25

申请号：US624846

申请日：1984-06-26

Applicant: Gene W. Lawrence ,  Thomas L. Davis

Inventor： Gene W. Lawrence ,  Thomas L. Davis

IPC: G01S7/40

CPC classification number: G01S7/4052 ,  G01S2007/4095

Abstract: The testing of radar systems is enhanced with the use of clutter generator that simulates realistic terrain echo returns which are provided in real-time. A fast array processor is used in combination with a Fourier Transform processor to produce a complex digital output having time, frequency and magnitude information corresponding to the composite echos from thousands of points. A digital-to-analog converter filters the output and a single-sideband mixer converts the digital output to a radio frequency signal.

Abstract translation: 雷达系统的测试通过使用模拟实时提供的实际地形回波返回的杂波发生器来增强。 快速阵列处理器与傅立叶变换处理器组合使用以产生具有对应于来自数千个点的复合回波的时间，频率和幅度信息的复数数字输出。 数模转换器对输出进行滤波，单边带混频器将数字输出转换为射频信号。

公开(公告)号：US4521780A

公开(公告)日：1985-06-04

申请号：US312800

申请日：1981-10-19

Applicant: Fritz K. Preikschat

Inventor： Fritz K. Preikschat

IPC: G01S7/40

CPC classification number: G01S7/4052 ,  G01S2007/4086

Abstract: The target simulation system includes a reflector 18 located within a closed and shielded room 10. An array 30 of transmitting elements is located within an opening 22 of the room so that the array is centered at a first focal point F.sub.1 of an ellipsoidal reflecting surface 18A of the reflector, and a receiving element of the target seeker 34 to be tested is located within an opening 24 so that the receiving element is centered at a second focal point F.sub.2 of the ellipsoidal reflecting surface. Phased array control system 32 causes the array to simultaneously and independently transmit a plurality of beams of radiation toward the reflector and each transmitted beam results in a corresponding reflected beam whose beam axis passes through the second focal point of the array so that each reflected beam simulates radiation coming from a distinct target. In the case where the radiation is electromagnetic radiation in the MMW range, the phased array control system (FIGS. 2 and 3) performs all phasing and modulation that is required for the steering and focusing of each beam and for the simulation of target range, target characteristics and target seeker characteristics at an intermediate frequency.

Abstract translation: 目标模拟系统包括位于封闭和屏蔽的房间10内的反射器18.发射元件的阵列30位于房间的开口22内，使得阵列在椭圆反射表面18A的第一焦点F1处居中 并且待测试的目标探测器34的接收元件位于开口24内，使得接收元件在椭圆面反射表面的第二焦点F2处居中。 相控阵列控制系统32使得阵列同时且独立地向反射器发送多个辐射束，并且每个发射的光束产生相应的反射光束，其束轴穿过阵列的第二焦点，使得每个反射光束模拟 来自不同目标的辐射。 在辐射是MMW范围内的电磁辐射的情况下，相控阵控制系统（图2和3）执行每个光束的转向和聚焦所需的所有定相和调制，并且用于模拟目标范围， 目标特征和目标探针特征在中频。

公开(公告)号：US4450447A

公开(公告)日：1984-05-22

申请号：US284287

申请日：1981-07-17

Applicant: Howard A. Zebker ,  Daniel N. Held ,  Richard M. Goldstein ,  Thomas C. Bickler

Inventor： Howard A. Zebker ,  Daniel N. Held ,  Richard M. Goldstein ,  Thomas C. Bickler

IPC: G01S7/40

CPC classification number: G01S7/4052 ,  G01S2007/4095

Abstract: A synthetic aperture radar (SAR) target simulator for simulating the radar return, or echo, from a target seen by a SAR antenna mounted on a platform moving with respect to the target includes a first-in first-out memory (26) which has digital information clocked in at a rate related to the frequency of a transmitted radar signal and digital information clocked out with a fixed delay defining range between the SAR and the simulated target, and at a rate related to the frequency of the return signal. An rf input signal having a frequency similar to that utilized by a synthetic aperture array radar is mixed with a local oscillator (16) signal to provide a first baseband signal having a frequency considerably lower than that of the rf input signal. The first baseband signal is converted to a plurality of digital words which are clocked into the memory (26) at a rate related to the frequency of the local oscillator (16). A synthesizer (34) is locked to the local oscillator (16) and provides an output signal having a nominal frequency equal to that of the local oscillator ( 16), but altered in accordance with range changes between the SAR and the simulated target, as well as in accordance with Doppler information associated with return signals from the target.

Abstract translation: 用于模拟从安装在相对于目标移动的平台上的SAR天线所看到的目标的雷达返回或回波的合成孔径雷达（SAR）目标模拟器包括先进先出存储器（26），其具有 以与发射的雷达信号的频率相关的速率和以SAR和模拟目标之间的固定延迟定义范围计时的数字信息以与返回信号的频率相关的速率计时的数字信息。 具有与合成孔径阵列雷达所使用的频率相似的频率的RF输入信号与本地振荡器（16）信号混合，以提供具有比rf输入信号的频率显着更低的频率的第一基带信号。 第一基带信号被转换成以与本地振荡器（16）的频率相关的速率计时到存储器（26）中的多个数字字。 合成器（34）被锁定到本地振荡器（16）并且提供具有等于本地振荡器（16）的额定频率的输出信号，但是根据SAR和模拟目标之间的范围变化而改变，如 以及根据与来自目标的返回信号相关联的多普勒信息。

公开(公告)号：US4423418A

公开(公告)日：1983-12-27

申请号：US274862

申请日：1981-06-18

Applicant: Lester S. Pearlman

Inventor： Lester S. Pearlman

IPC: G01S7/40 ,  G09B9/54

CPC classification number: G01S7/4052 ,  G09B9/54 ,  G01S2007/4095

Abstract: A technique for simulating various signals, such as from radar emitters, in a broad frequency spectrum by generating at any given instant only those of the signals that affect a receiver which is tuned to a particular bandwidth. As the receiver is tuned to a new bandwidth, the simulating system responds by quickly generating any signal or signals that exist in the new bandwidth.

Abstract translation: 一种用于通过在任何给定时刻仅通过影响被调谐到特定带宽的接收机的信号中的那些来模拟来自雷达发射器的各种信号，例如来自雷达发射器的技术。 随着接收机被调谐到新的带宽，仿真系统通过快速生成存在于新带宽中的任何信号或信号来进行响应。

公开(公告)号：US4319247A

公开(公告)日：1982-03-09

申请号：US88061

申请日：1979-10-24

Applicant: Kenneth A. J. Warren

Inventor： Kenneth A. J. Warren

IPC: G01S7/40

CPC classification number: G01S7/4052 ,  G01S7/40 ,  G01S2007/4065

Abstract: When existing radar systems fail to detect a target the operator may be unsure whether this is because of some failure in the apparatus or because there is in fact no target there.The invention deals with this problem by providing a testing device for simulating targets at different ranges. The testing device includes a small aerial arranged to sample a transmitted pulse. This sample is fed to a circuit which imposes successive delays on the sample and feeds it back to the aerial at successive different times.The successive delays are produced by a delay line and a feed-back loop containing an amplifier. The circuit also includes a frequency shifter which simulates a Doppler shift.

Abstract translation: 当现有雷达系统未能检测到目标时，操作员可能不确定这是否是由于设备中的某些故障，或者实际上没有目标。 本发明通过提供用于模拟不同范围的目标的测试装置来处理该问题。 测试装置包括一个小型天线，用于对传输的脉冲进行采样。 该样品被馈送到电路，其在样品上施加连续的延迟并在连续的不同时间将其馈送回天线。 连续的延迟由延迟线和包含放大器的反馈回路产生。 该电路还包括一个模拟多普勒频移的移相器。

公开(公告)号：US4115771A

公开(公告)日：1978-09-19

申请号：US797675

申请日：1977-05-17

Applicant: George B. Litchford

Inventor： George B. Litchford

IPC: G01S5/12 ,  G01S7/40 ,  G01S13/00 ,  G01S13/78 ,  G01S9/56

CPC classification number: G01S7/40 ,  G01S13/003 ,  G01S13/781 ,  G01S7/4052 ,  G01S2007/4082 ,  G01S5/12

Abstract: A virtual secondary surveillance radar (SSR) is provided at any desired location within the coverage area of an actual SSR by receiving the interrogations from the actual SSR and the transponder replies thereto. The received signals are processed to yield information as to the positions of the transponders with respect to the desired location, simulating the performance of an actual SSR at that location.BACKGROUND

Abstract translation: 通过接收来自实际SSR和应答器对其的回复的询问，在实际SSR的覆盖区域内的任何所需位置处提供虚拟二次监视雷达（SSR）。 接收的信号被处理以产生关于应答器相对于期望位置的位置的信息，模拟在该位置处的实际SSR的性能。

公开(公告)号：US4049953A

公开(公告)日：1977-09-20

申请号：US699820

申请日：1976-06-24

Applicant: Albert B. Evans, Jr.

Inventor： Albert B. Evans, Jr.

IPC: G01S7/36 ,  G01S7/40 ,  G01S13/12 ,  G01S13/22 ,  G01S7/30 ,  G06F15/20

CPC classification number: G01S13/225 ,  G01S13/12 ,  G01S7/36 ,  G01S7/4052 ,  G01S2007/4082

Abstract: A complex pulse repetition frequency generator for producing a pulse repeion frequency (PRF) signal having programmable stagger intervals. The device consists of a clock for selecting one of a series of standard clock pulses which are used to increment a counter. A comparator compares the accumlated clock pulses with a stagger data output signal produced by a data memory source. When the outputs are equal, the comparator produces a PRF output pulse. Two data memory bands are provided; a random access memory in which stagger data can be programmed by a series of switches, and a preprogrammed read-only memory. Address counters are used with each memory unit and provide capability for addressing selected memory locations from the data memory sources. A pulse width generator allows the operator to vary the pulse width and utilizes an injection lock oscillator to prevent jitter whenever a standard clock pulse is used which is not an even multiple of a hundred nanoseconds.

Abstract translation: 一种用于产生具有可编程交错间隔的脉冲重复频率（PRF）信号的复合脉冲重复频率发生器。 该器件由用于选择用于增加计数器的一系列标准时钟脉冲之一的时钟组成。 比较器将累积的时钟脉冲与由数据存储器源产生的交错数据输出信号进行比较。 当输出相等时，比较器产生PRF输出脉冲。 提供两个数据存储带; 一个随机存取存储器，其中可以通过一系列开关来编程交错数据，以及一个预编程的只读存储器。 地址计数器与每个存储器单元一起使用，并提供从数据存储器源寻址所选存储器位置的能力。 脉冲发生器允许操作者改变脉冲宽度，并且使用注入锁定振荡器以在使用不是百纳秒的偶数倍的标准时钟脉冲时防止抖动。

公开(公告)号：US4005424A

公开(公告)日：1977-01-25

申请号：US625392

申请日：1975-10-24

Applicant: Richard W. Fetter

Inventor： Richard W. Fetter

IPC: G01S7/40

CPC classification number: G01S7/4052 ,  G01S2007/4082

Abstract: A waveform generator particularly suited for the simulation of Doppler ra returns from precipitation is provided. Also, waveform pattern selected capability is provided and spectral shapes such as Gaussian distributions, symmetrical and asymmetrical bimodal spectral shapes or flat spectra can be chosen and generated. The device is portable and capable of being used in the field.

Abstract translation: 提供了一种特别适合模拟多普勒雷达回波的波形发生器。 此外，提供波形图案选择能力，并且可以选择和生成诸如高斯分布，对称和不对称双峰光谱形状或平面光谱的光谱形状。 该设备是便携式的，能够在现场使用。