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140 条记录 (耗时 0.016 秒)

    Transponder systems
    51.
    发明授权
    Transponder systems 失效
    应答器系统

    公开(公告)号：US4679046A

    公开(公告)日：1987-07-07

    申请号：US810026

    申请日：1985-12-17

    申请人： Stephen P. Curtis ,  Gary V. Jordan

    发明人： Stephen P. Curtis ,  Gary V. Jordan

    IPC分类号： G01S13/75 ,  G01S7/02 ,  G01S13/76 ,  G01S13/79 ,  G06K7/10 ,  H01Q7/00 ,  H01Q21/24 ,  G01S13/80 ,  G08B13/24

    CPC分类号： G06K7/10346 ,  G01S13/762 ,  G01S7/026 ,  G06K7/10316 ,  G08B13/2471 ,  G08B13/2474 ,  G08B13/2477 ,  H01Q21/24 ,  H01Q7/00

    摘要： In a transponder adapted to be attached to an object to be identified, an interrogator for interrogating the transponder utilizes an antenna system including first and second antennae with the first antenna being formed as a loop and the second antenna formed in a figure-8 configuration, and being coplanar with the first antenna. A source of power provides first and second transmission signals to the first and second antennae, respectively. A phase shift is introduced between the first and second transmission signals such that the first and second antennae create an electromagnetic interrogating field in a desired region with the electromagnetic field having a non-zero value at all points within the desired region for activating the transponder regardless of the orientation of the transponder. At least one of the two antennae may be arranged to function as a receiving antenna to receive signals emitted by the transponder.

    摘要翻译： 在适于附接到要识别的对象的转发器中，用于询问应答器的询问器利用包括第一和第二天线的天线系统，其中第一天线形成为环路，第二天线以图8的形式形成， 并与第一个天线共面。 功率源分别向第一和第二天线提供第一和第二传输信号。 在第一和第二传输信号之间引入相移，使得第一和第二天线在期望区域中产生电磁询问场，电磁场在期望区域内的所有点处具有非零值，用于激活应答器 的应答器的方向。 可以将两个天线中的至少一个布置成用作接收天线以接收由应答器发射的信号。

    Video processor for air traffic control beacon system
    52.
    发明授权
    Video processor for air traffic control beacon system 失效
    视频处理器用于空中交通管制信标系统

    公开(公告)号：US4540986A

    公开(公告)日：1985-09-10

    申请号：US425201

    申请日：1982-09-28

    申请人： Frank Byrne

    发明人： Frank Byrne

    IPC分类号： G01S13/76 ,  G01S13/80

    CPC分类号： G01S13/767 ,  G01S13/762

    摘要： A circuit for use in a transponder located in an aircraft or the like for identifying a true side lobe suppression signal being transmitted by a ground located transmitted system. The true side lobe suppression signal includes at least pulses P1 and P2. The circuit causes the transponder to produce a reply signal upon the amplitude of the P1 pulse being a predetermined ratio to said P2 pulse. The circuit includes a pair of transistors with a capacitor connected to the output of the second transistor. The pulses P1 and P.sub.2 are supplied to the base electrode of the first transistor. Pulse P1 turns on the two transistors and charges the capacitor to a predetermined level so that when the second pulse P2 arrives, it does not turn on a transistor when it is equal to or less than the first pulse P1.

    摘要翻译： 一种用于位于飞机等中的应答器的电路，用于识别由位于发射系统的地面发射的真实旁瓣抑制信号。 真正的旁瓣抑制信号至少包括脉冲P1和P2。 当P1脉冲的幅度是与所述P2脉冲的预定比率时，电路使得应答器产生应答信号。 电路包括一对具有连接到第二晶体管的输出端的电容器的晶体管。 脉冲P1和P2被提供给第一晶体管的基极。 脉冲P1打开两个晶体管，并将电容器充电到预定电平，使得当第二个脉冲P2到达时，当晶体管等于或小于第一个脉冲P1时，它不会导通晶体管。

    P-I-N type diode high frequency switch for secondary radar interrogation devices and transponders
    53.
    发明授权
    P-I-N type diode high frequency switch for secondary radar interrogation devices and transponders 失效
    P-I-N型二极管高频开关用于二次雷达询问装置和转发器

    公开(公告)号：US4296414A

    公开(公告)日：1981-10-20

    申请号：US98638

    申请日：1979-11-29

    申请人： Franz Beyer ,  Siegfried Sedlmair

    发明人： Franz Beyer ,  Siegfried Sedlmair

    IPC分类号： G01S13/76 ,  H01P1/15 ,  G01S13/02

    CPC分类号： H01P1/15 ,  G01S13/762

    摘要： A P-I-N type diode high frequency switch in a secondary radar interrogation device working with ISLS and RSLS and consisting of a transmitter, two receivers and two antennas. So as to reduce the high cost for P-I-N type diodes, including driver stages for the transmission and reception separation and to eliminate the necessity of an antenna switching unit, the terminals 19 and 20 of a pair of antennas are directly connected through single lines 23 and 24 to band pass filters 5 and 6 connected to respective receivers 7 and 8 with the band pass filters 5 and 6 blocking the transmission signal and allowing reception of received signals and wherein the electrical lengths of the line and the band pass filter is such that the input impedance corresponding to no-load operation occurs at the corresponding antenna terminal for the transmission frequency. The invention can be used in secondary radar transponders operating with two antenna diversity and the high frequency switch of the invention can be used in both civil secondary radar interrogation devices as well as military IFF interrogation devices as, for example, in ground stations.

    摘要翻译： 二次雷达询问设备中的P-I-N型二极管高频开关，与ISLS和RSLS一起工作，由发射机，两个接收机和两个天线组成。 为了降低PIN型二极管的高成本，包括用于发送和接收间隔的驱动级，并且消除天线切换单元的必要性，一对天线的端子19和20通过单线23和 24连接到相应接收机7和8的带通滤波器5和6，带通滤波器5和6阻塞发送信号并允许接收接收的信号，并且其中线路和带通滤波器的电长度使得 对应于空载操作的输入阻抗发生在相应的天线端子上，用于传输频率。 本发明可用于以两个天线分集工作的二次雷达应答器，本发明的高频开关可用于民用二次雷达询问装置以及军用IFF询问装置，例如在地面站中。

    Radar systems
    55.
    发明授权
    Radar systems 失效
    雷达系统

    公开(公告)号：US4109248A

    公开(公告)日：1978-08-22

    申请号：US608214

    申请日：1975-08-27

    申请人： Philip Neville George Knowles ,  Christopher Pell

    发明人： Philip Neville George Knowles ,  Christopher Pell

    IPC分类号： G01S13/76 ,  G01S9/56

    CPC分类号： G01S13/762 ,  G01S13/46 ,  G01S2013/466

    摘要： A secondary radar system for establishing the position and identity of aircraft etc. on airfields, particularly for controlling their ground movements during bad visibility, comprises a pair of spaced aerials each arranged to successively transmit a particular one of two interrogate pulses, the time relationship between the two pulses being varied such that a predetermined time relationship between the two interrogate pulses obtains at varying distances from said spaced aerials to afford selective interrogation of a transponder receiving the two interrogate pulses, and a third aerial spaced from the pair of spaced aerials for transmitting a further pulse in a second predetermined time relationship with one of the interrogate pulses whereby a selected transponder or transponders receiving said two interrogation pulses in said predetermined time relationship is caused to be suppressed.

    Beacon system employing ramped gain receiver
    56.
    发明授权
    Beacon system employing ramped gain receiver 失效
    信标系统采用斜坡增益接收机

    公开(公告)号：US4100544A

    公开(公告)日：1978-07-11

    申请号：US818376

    申请日：1977-07-25

    申请人： Royal V. Keeran

    发明人： Royal V. Keeran

    IPC分类号： G01S3/32 ,  G01S7/28 ,  G01S13/76 ,  G01S9/22

    CPC分类号： G01S13/762 ,  G01S3/32 ,  G01S7/2813

    摘要： A beacon receiver or IFF system in which the gain of the receiver is time varied to enhance the discrimination between response from transponders located ahead of the interrogator as compared with the responses from transponders in the side or rear lobe regions of the interrogator antenna pattern. The system is employed with a directional antenna and signal processing apparatus giving sum .SIGMA. and difference .DELTA. channels. In accordance with this invention, the gain of the receiver in the sum .SIGMA. channel is increased from the minimum value to a maximum value beginning after the end of interrogation pulse. The difference .DELTA. channel is varied in gain from the time in the beginning after the end of the interrogator pulse but the gain is varied inversely from the maximum level at the beginning of reception to a maximum level at the end of reception.

    摘要翻译： 信标接收机或IFF系统，其中接收机的增益随时间变化，以增强与位于询问器前方的应答器的响应之间的区别，与来自询问器天线图案的侧波瓣区域或后波瓣区域中的应答器的响应相比。 该系统与定向天线和信号处理装置一起使用，提供总和SIGMA和差分DELTA信道。 根据本发明，SIGMA信号中的接收机的增益从询问脉冲结束后开始的最小值增加到最大值。 差分DELTA信道在询问器脉冲结束之后的开始时间的增益中变化，但增益从接收开始时的最大电平与接收结束时的最大电平反向变化。

    Non-main beam reflected iff interrogation rejector
    57.
    发明授权
    Non-main beam reflected iff interrogation rejector 失效
    非主要光束反射IFF INTERFOGRON REJECTOR

    公开(公告)号：US3680090A

    公开(公告)日：1972-07-25

    申请号：US3680090D

    申请日：1970-07-27

    申请人： US NAVY

    发明人： BISHOP WALTON B

    IPC分类号： G01S13/76 ,  G01S9/56

    CPC分类号： G01S13/762

    摘要： A technique of utilizing the measured time between reception of a sidelobe suppression signal and reflected signals of an IFF interrogation to inhibit further responses to succeeding reflected path interrogations.

    摘要翻译： 利用接收旁瓣抑制信号之间的测量时间和IFF询问的反射信号以抑制对后续反射路径询问的进一步响应的技术。