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    Direction finder with bearing sense determination
    31.
    发明授权
    Direction finder with bearing sense determination 失效
    具有轴承感知确定的方向探测器

    公开(公告)号：US3795001A

    公开(公告)日：1974-02-26

    申请号：US3795001D

    申请日：1972-05-08

    申请人： INT STANDARD ELECTRIC CORP

    发明人： POPPE D ,  ODEGAAR G

    IPC分类号： G01S3/06 ,  G01S3/14 ,  G01S3/12

    CPC分类号： G01S3/06 ,  G01S3/065 ,  G01S3/143

    摘要： A dual orthogonal loop antenna direction finding system having corresponding dual receiver channels and a reference (sense) antenna. The equipment is programmed through at least ''''Updating, '''' ''''Bearing,'''' ''''Sense'''' and ''''Display'''' modes in which receiver channels are phase and gain equalized, bearing readings are taken without regard to ambiguities, and corrected readings are displayed respectively. Bearing readings are stored before display until corrected by a process including relative bearing angle calculation against more than one reference vector.

    摘要翻译： 具有对应的双重接收机通道和参考（感测）天线的双正交环形天线方向发现系统。 设备通过至少“更新”，“轴承”，“感应”和“显示”模式进行编程，其中接收机通道是相位和均衡的，承载读数不考虑模糊度，并且校正读数分别显示。 在显示之前存储轴承读数，直到通过包括针对多于一个参考矢量的相对承载角计算的过程来校正。

    Method and apparatus for crystal controlled automatic direction finder
    32.
    发明授权
    Method and apparatus for crystal controlled automatic direction finder 失效
    晶体控制自动方向探测器的方法与装置

    公开(公告)号：US3564548A

    公开(公告)日：1971-02-16

    申请号：US3564548D

    申请日：1968-06-10

    申请人： KING RADIO CORP

    发明人： GRILLOT RONALD E ,  FARRAR JAMES G

    IPC分类号： G01S3/06 ,  H03G1/00 ,  H03L7/183 ,  G01S3/42

    CPC分类号： H03G1/0017 ,  G01S3/065 ,  H03L7/183

    摘要： A CRYSTAL CONTROLLED ADF (AUTOMATIC DIRECTION FINDER) UTILIZES A STABILIZED MASTER OSCILLATOR (SMO) AND A SINGLE REFERENCE CRYSTAL TO PROVIDE DIGITAL FREQUENCY SELECTION IN PRESELECTED INCREMENTS OF ANY DESIRED FREQUENCY WITHIN THE TUNING RANGE OF THE ADF. A REFERENCE FREQUENCY IS DERIVED FORM THE SINGLE REFERENCE CRYSTAL AND IS USED AS A COMPARISON FOR A NEWLY SELECTED FREQUENCLY. A VOLTAGE CONTROLLED OSCILLATOR (VCO) IS TUNED BY A CARACTOR DIODE FROM A PORTION OF THE SMO CIRCUIT. THE OUTPUT OF THE VCO IS FED TO A VARIABLE FREQUENCY DIVIDER WHICH DIVIDES THE VCO FREQUENCY. A FREQUENCY DISCRIMINATOR BRINGS THE VCO FREQUENCY CLOSE TO THE REFERENCE FREQUENCY AND A PHASE DETECTOR PROVIDES THE ADDITIONAL FINE CONTROL THAT BRINGS THE VCO TO THE EXACT SELECTED FREQUENCY WITHIN THE LIMITS OF THE CRYSTAL REFERENCE.