CN104698452A - 车辆的雷达系统和用于测量该雷达系统中的方位角的方法 - Google Patents

车辆的雷达系统和用于测量该雷达系统中的方位角的方法 Download PDF

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CN104698452A
CN104698452A CN201410281373.0A CN201410281373A CN104698452A CN 104698452 A CN104698452 A CN 104698452A CN 201410281373 A CN201410281373 A CN 201410281373A CN 104698452 A CN104698452 A CN 104698452A
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sidelobe suppression
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崔种焕
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Halla Creedong Electronics Co ltd
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Mando Corp
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88Radar or analogous systems specially adapted for specific applications
    • G01S13/93Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2626Arrangements specific to the transmitter only
    • H04L27/26265Arrangements for sidelobes suppression specially adapted to multicarrier systems, e.g. spectral precoding
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06Systems determining position data of a target
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06Systems determining position data of a target
    • G01S13/42Simultaneous measurement of distance and other co-ordinates
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50Systems of measurement based on relative movement of target
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    • G01S13/56Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/14Systems for determining direction or deviation from predetermined direction
    • G01S3/28Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics
    • G01S3/32Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics derived from different combinations of signals from separate antennas, e.g. comparing sum with difference
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28Details of pulse systems
    • G01S7/2813Means providing a modification of the radiation pattern for cancelling noise, clutter or interfering signals, e.g. side lobe suppression, side lobe blanking, null-steering arrays
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/35Details of non-pulse systems
    • G01S7/352Receivers
    • G01S7/354Extracting wanted echo-signals
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/40Means for monitoring or calibrating
    • G01S7/4004Means for monitoring or calibrating of parts of a radar system
    • G01S7/4021Means for monitoring or calibrating of parts of a radar system of receivers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/27Adaptation for use in or on movable bodies
    • H01Q1/32Adaptation for use in or on road or rail vehicles
    • H01Q1/3208Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
    • H01Q1/3233Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/20Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/206Microstrip transmission line antennas
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00Antenna arrays or systems
    • H01Q21/06Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061Two dimensional planar arrays
    • H01Q21/065Patch antenna array
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H01Q3/2611Means for null steering; Adaptive interference nulling
    • H01Q3/2629Combination of a main antenna unit with an auxiliary antenna unit
    • H01Q3/2635Combination of a main antenna unit with an auxiliary antenna unit the auxiliary unit being composed of a plurality of antennas
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88Radar or analogous systems specially adapted for specific applications
    • G01S13/93Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9321Velocity regulation, e.g. cruise control

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Abstract

本发明提供了一种用于车辆的雷达系统和用于测量该雷达系统中的方位角的方法,所述系统和方法能够通过阻截从不存在车辆的地面或者在仰角方向上输入的错误信号来增加目标物感测和追踪的可靠性。一种用于阻截从地面或仰角方向上输入的错误信号的系统包括:两个或更多个主接收天线;单个旁瓣抑制天线;以及雷达,其被配置为比较从所述主接收天线接收的主接收信号的幅值与从所述旁瓣抑制天线接收的旁瓣抑制接收信号的幅值,并当所述主接收信号的幅值大于所述旁瓣抑制接收信号的幅值时,通过采用接收到的所述主接收信号来测量目标物的方位角。

Description

车辆的雷达系统和用于测量该雷达系统中的方位角的方法
相关申请的交叉引用
本申请要求2013年12月9日在韩国知识产权局提交的第10-2013-0152413号韩国专利申请的优先权,该申请的全部内容以引用方式并入本文。
技术领域
本发明涉及车辆的雷达系统和用于测量该雷达系统中的方位角的方法,更具体地,涉及通过阻截从不存在车辆的地面或者在仰角方向上输入的错误信号来增加目标物感测和追踪的可靠性的车辆的雷达系统和用于测量该雷达系统中的方位角的方法。
背景技术
随着车辆智能化,现有车辆安装有各种车辆控制系统,例如用于感测车道偏离的自适应巡航控制(ACC)系统、用于感测车辆后方车道的变道辅助(LCA)系统、用于前方检测和避碰的STOP&GO系统、用于停车控制的停车辅助系统、用于感测后方道路以检测进入相邻车道的车辆并且执行碰撞警报避碰的变道辅助(LCA)/盲点检测(BSD)/预防追尾(RPC)系统等。
这样的各种车辆控制系统包括可检测目标物的雷达。
雷达可通过向空间辐射特定频率的电磁信号并且收集弱回声信号来得到反射目标物的信息,例如距离、角度和速度。
作为一个示例,韩国专利申请公开第10-2011-0126939号(2011年11月24日公开,名称为“INTEGRATED RADAR SYSTEM ANDVEHICLE CONTROL SYSTEM”)中公开了采用这种雷达的车辆控制系统。
具体地,由于车辆的雷达系统在存在各种结构以及车辆的环境中进行操作,因此必须准确地将主信号与错误信号区分开。
然而,由于车辆的传统雷达系统只计算方位方向的接收信号的角度,并不计算垂直方向上的角度,因此传统的雷达系统不能将主信号和仰角方向的错误信号区分开。
另外,过去,因诸如产品的成本和尺寸的限制规格,没有测量仰角,波束图案被设计成保持除了感测范围(主光束)之外的区域中的低旁瓣电平。
因此,主信号会受到被地反射的信号或自身车辆车轮信号、或当穿过隧道时被顶蓬反射的信号影响,有可能将出现错误感测。
引用列表
专利文献
名称为“INTEGRATED RADAR SYSTEM AND VEHICLECONTROL SYSTEM”的韩国专利申请公开第10-2011-0126939号(2011年11月24日)
发明内容
本发明的一方面涉及能够通过阻截从不存在车辆的地面或者在仰角方向上输入的错误信号来增加目标物感测和追踪可靠性的车辆的雷达系统和用于测量该雷达系统中的方位角的方法。
根据本发明的实施方案,一种用于阻截从地面或仰角方向上输入的错误信号的系统,所述系统包括:两个或更多个主接收天线;单个旁瓣抑制天线(side lobe suppression antenna);雷达,其被配置为比较从所述主接收天线接收的主接收信号的幅值与从所述旁瓣抑制天线接收的旁瓣抑制接收信号的幅值,并且当所述主接收信号的幅值大于所述旁瓣抑制接收信号的幅值时,通过使用接收到的所述主接收信号来测量目标物的方位角。
所述主接收天线可包括相位延迟单元,所述相位延迟单元被安装在线路的中心,以将第一相位和第二相位调节成相同相位,所述旁瓣抑制天线可包括垂直连接部分,所述垂直连接部分被安装在线路的中心,以将第一相位和第二相位之间的相位差调节成180度。
所述雷达可包括:接收单元,其被配置为从所述主接收天线和所述旁瓣抑制天线接收从所述目标物反射并返回的主接收信号和旁瓣抑制接收信号;确定单元,其被配置为比较由所述接收单元接收的所述主接收信号的幅值和所述旁瓣抑制接收信号的幅值,并且确定所述主接收信号的幅值是否大于所述旁瓣抑制接收信号的幅值;方位角测量单元,其被配置为当所述确定单元确定所述主接收信号的幅值较大时,通过使用在所述主接收信号和所述旁瓣抑制接收信号之间的交点内的主接收信号来测量对应目标物的方位角。
所述确定单元可确定在所述交点处所述主接收信号的幅值是否大于所述旁瓣抑制接收信号的幅值。
根据本发明的另一个实施方案,一种用于测量在用于阻截从地面或仰角方向上输入的错误信号的系统中的方位角的方法,所述方法包括:从两个或更多个主接收天线接收从目标物反射并返回的主接收信号;从单个旁瓣抑制接收天线接收从目标物反射并返回的旁瓣抑制接收信号;比较从所述主接收天线接收的所述主接收信号的幅值与从所述旁瓣抑制天线接收的所述旁瓣抑制接收信号的幅值,并且当所述主接收信号的幅值大于所述旁瓣抑制接收信号的幅值时,通过使用接收到的所述主接收信号来测量目标物的方位角。
测量目标物的方位角的步骤可包括:确定所述主接收信号和所述旁瓣抑制接收信号之间的交点;确定在所确定的所述交点处所述主接收信号的幅值是否大于所述旁瓣抑制接收信号的幅值;当确定所述主接收信号的幅值较大时,通过使用所述交点内的所述主接收信号来测量对应目标物的方位角。
附图说明
图1是用于描述根据本发明的实施方案的车辆的雷达系统的示图。
图2是用于描述图1中示出的雷达的框图。
图3是根据本发明的实施方案的用于描述用于测量车辆的雷达系统中的方位角的方法的操作流程图。
图4是示出从图1中示出的主接收天线接收的主接收信号的曲线图。
图5是示出从图1中示出的旁瓣抑制天线接收的旁瓣抑制接收信号的曲线图。
图6是示出图4和图5中示出的接收信号之间的交点的曲线图。
具体实施方式
接下来,将在下文中参照附图详细地描述本发明的优选实施方案。
图1是用于描述根据本发明的实施方案的车辆的雷达系统的示图,图2是用于描述图1中示出的雷达的框图。
参照图1,根据本发明的实施方案的车辆的雷达系统包括两个或更多个主接收天线10、旁瓣抑制天线20和雷达30。雷达30从主接收天线10和旁瓣抑制天线20接收从目标物反射并返回的信号,并且通过使用接收到的信号来测量目标物的方位角。
主接收天线10接收在光束被辐射到发送天线(未示出)之后返回的回声信号,也就是说,从目标物反射并返回的信号。这里,可使用两个或三个接收天线作为主接收天线10。
多个贴片天线(未示出)被安装在主接收天线10中。该多个贴片天线通过线路连接。相位延迟单元11设置在线路的中心。相位延迟单元11可参照线路的中心将第一相位和第二相位调节成相同相位。被调节成相同相位的主接收信号被输出到雷达30。
旁瓣抑制天线20是具有比主接收天线10的波束图案更高级别的波束图案的天线。旁瓣抑制天线20可阻截主接收天线10的波束图案的旁瓣。旁瓣抑制天线20包括线路中心的垂直连接部分21而非相位延迟单元11。垂直连接部分21是用于将第一相位和第二相位之间的相位差调节成180度的线路。
第一相位和第二相位之间的相位差被调节成180度的旁瓣抑制接收信号被输出到雷达30。
雷达30电连接到主接收天线10和旁瓣抑制天线20。
参照图2,雷达30包括接收单元31、确定单元32和方位角测量单元33。
接收单元31分别从主接收天线10和旁瓣抑制天线20接收主接收信号和旁瓣抑制接收信号。
确定单元32比较主接收信号的幅值与旁瓣抑制接收信号的幅值并且确定主接收信号的幅值是否大于旁瓣抑制接收信号的幅值。此时,当在主接收信号和旁瓣抑制接收信号之间的交点所限定的区域中主接收信号的幅值大于旁瓣抑制接收信号的幅值时,确定单元32确定对应信号是正常接收信号。另一方面,旁瓣抑制接收信号的幅值大于主接收信号的幅值时,确定单元32确定对应信号是异常接收信号。
当确定单元32确定信号是正常接收信号时,方位角测量单元33通过使用交点内的上述区域来测量目标物的方位角。也就是说,由于从目标物反射并返回的信号根据方向具有不同的相位差,所以方位角测量单元33反过来通过使用相位差来计算方位角。使用以下的等式1来计算方位角Θ。
   (等式1)
其中,c是光常数,是相位差,d是天线间的距离,fT是频率。
以下,将参照图3描述用于测量如上构造的车辆的雷达系统中的方位角的方法。
图3是根据本发明的实施方案的用于描述用于测量车辆的雷达系统中的方位角的方法的操作流程图。
参照图3,雷达30从两个或更多个主接收天线10和旁瓣抑制天线20接收相对于从发送天线(未示出)发送到目标物的发送信号的接收信号(S11)。图4示出通过主接收天线10接收的接收信号,图5是通过旁瓣抑制天线20接收的接收信号。
雷达30比较接收到的这两个信号的幅值并且确定从主接收天线10接收的主接收信号的幅值是否大于从旁瓣抑制天线20接收的旁瓣抑制接收信号的幅值(S13)。此时,通过确定在由主接收信号和旁瓣抑制接收信号之间的交点所限定的区域中主接收信号的幅值是否大于旁瓣抑制接收信号的幅值来执行确定步骤。
当在步骤S13中确定主接收信号的幅值小于旁瓣抑制接收信号的幅值时,雷达30确定步骤S11中接收的主接收信号是异常接收信号(S17)。
当在步骤S13中确定主接收信号的幅值大于旁瓣抑制接收信号的幅值时,雷达30确定步骤S11中接收的主接收信号是正常接收信号,并且测量位于由交点限定的感测区中的目标物的方位角(S15)。
参照图6,雷达30可以确定主接收信号和旁瓣抑制接收信号之间的交点,并且通过使用由确定的焦点限定的区域中的主接收信号来测量方位角。在图6中,位于交点左侧的接收信号是从地面接收的接收信号,位于交点右侧的接收信号是在仰角方向上接收的接收信号。
如此,雷达30可确定只有交点内的区域是感测区并且阻截来自地面或仰角方向上的错误信号,从而提高感测可靠性。
根据本发明的实施方案,可以通过阻截从不存在车辆的地面或者仰角方向上输入的错误信号来提高目标物感测和追踪可靠性。
另外,根据本发明的实施方案,可以通过在两个或更多个接收天线中额外安装单个旁瓣抑制天线的结构来接收目标物的旁瓣抑制接收信号。
根据本发明的实施方案,容易将包括垂直连接部分的旁瓣抑制天线设置在传统接收天线中被去除相位延迟单元的位置处,以将第一相位和第二相位之间的相位差调节成180度。
虽然已经参照特定实施方案描述了本发明的实施方案,但本领域的技术人员应该清楚,可在不脱离如后面的权利要求书限定的本发明的精神和范围的情况下,进行各种改变和修改。
对附图标记的描述
10:主接收天线     20:旁瓣抑制天线
30:雷达           31:接收单元
32:确定单元       33:方位角测量单元

Claims (6)

1.一种用于阻截从地面或仰角方向上输入的错误信号的系统,所述系统包括:
两个或更多个主接收天线;
单个旁瓣抑制天线;以及
雷达,其被配置为比较从所述主接收天线接收的主接收信号的幅值与从所述旁瓣抑制天线接收的旁瓣抑制接收信号的幅值,并当所述主接收信号的幅值大于所述旁瓣抑制接收信号的幅值时,通过采用接收到的所述主接收信号来测量目标物的方位角。
2.根据权利要求1所述的系统,其中
所述主接收天线包括相位延迟单元,所述相位延迟单元被安装在线路的中心,以将第一相位和第二相位调节到相同相位,
所述旁瓣抑制天线包括垂直连接部分,所述垂直连接部分被安装在线路的中心,以将第一相位和第二相位之间的相位差调节到180度。
3.根据权利要求1所述的系统,其中所述雷达包括:
接收单元,其被配置为从所述主接收天线和所述旁瓣抑制天线接收从所述目标物反射并返回的主接收信号和旁瓣抑制接收信号;
确定单元,其被配置为比较由所述接收单元接收的所述主接收信号的幅值和所述旁瓣抑制接收信号的幅值,并且确定所述主接收信号的幅值是否大于所述旁瓣抑制接收信号的幅值;以及
方位角测量单元,其被配置为当所述确定单元确定所述主接收信号的所述幅值较大时,通过采用在所述主接收信号和所述旁瓣抑制接收信号之间的交点内的主接收信号来测量对应于目标物的方位角。
4.根据权利要求3所述的系统,其中所述确定单元确定在所述交点处所述主接收信号的所述幅值是否大于所述旁瓣抑制接收信号的所述幅值。
5.一种用于测量在用于阻截从地面或仰角方向上输入的错误信号的系统中的方位角的方法,所述方法包括:
从两个或更多个主接收天线接收从目标物反射并返回的主接收信号;
从单个旁瓣抑制接收天线接收从所述目标物反射并返回的旁瓣抑制接收信号;
比较从所述主接收天线接收的所述主接收信号的幅值与从所述旁瓣抑制天线接收的所述旁瓣抑制接收信号的幅值,并且当所述主接收信号的所述幅值大于所述旁瓣抑制接收信号的所述幅值时,通过使用接收到的所述主接收信号来测量所述目标物的方位角。
6.根据权利要求5所述的方法,其中测量所述目标物的所述方位角的所述步骤包括:
确定所述主接收信号和所述旁瓣抑制接收信号之间的交点;
确定在所确定的所述交点处所述主接收信号的幅值是否大于所述旁瓣抑制接收信号的幅值;
当确定所述主接收信号的幅值较大时,通过采用所述交点内的所述主接收信号来测量对应目标物的所述方位角。
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