公开(公告)号：US4021808A

公开(公告)日：1977-05-03

申请号：US627160

申请日：1975-10-30

申请人： Brendan J. Spratt

发明人： Brendan J. Spratt

IPC分类号： G01S13/10 ,  G01S1/54 ,  G01S1/56 ,  G01S5/02

CPC分类号： G01S1/56

摘要： A beam scanning through a receiver is detected at the receiver deriving a threshold level from the peak of the received beam, the threshold being used to detect the received beam envelope as delayed by an analog delay circuit.

摘要翻译： 在接收机处检测到通过接收机的波束扫描，从接收波束的峰值导出阈值电平，该阈值用于检测由模拟延迟电路延迟的接收波束包络。

公开(公告)号：US3887926A

公开(公告)日：1975-06-03

申请号：US41552373

申请日：1973-11-14

申请人： SINGER CO

发明人： SCHWARTZ LEONARD ,  CHIN EDWARD G H

IPC分类号： G01S1/54 ,  H01Q3/24 ,  H01Q19/10 ,  H01Q21/22 ,  H01Q3/26

CPC分类号： H01Q3/242 ,  G01S1/54 ,  H01Q19/102 ,  H01Q21/22

摘要： A landing system antenna in which a plurality of antenna elements arranged in a circular pattern are sequentially energized to project a scanning planar beam with fine scanning control maintained by controlling the phase in a plurality of small steps.

摘要翻译： 以圆形图案布置多个天线元件的层叠系统天线依次通电，以通过以多个小步骤控制相位而保持精细的扫描控制投射扫描平面光束。

公开(公告)号：US3858215A

公开(公告)日：1974-12-31

申请号：US29597172

申请日：1972-10-10

申请人： MARCONI CO LTD

发明人： MILLER W ,  WELLS E

IPC分类号： G01S1/60 ,  G01S1/02 ,  G01S1/54 ,  G01S1/08

CPC分类号： G01S1/02

摘要： A microwave transmission system suitable for use as an aircraft landing system consists of a linear array of radiators each of which radiates the same carrier signal. The carrier signal is modulated with a triangular frequency constant amplitude modulation; the application of the modulation being progressively delayed for the different radiators in the linear array. This produces a radiated pattern consisting of frequency spokes; each spoke having a unique frequency and being radiated in a unique direction. By noting the frequency of a received signal an aircraft can determine its angular position relative to the transmitter.

摘要翻译： 适用于飞机着陆系统的微波传输系统由辐射器的线性阵列组成，每个辐射器辐射相同的载波信号。 载波信号用三角频率恒定调制调制; 线性阵列中不同辐射器的调制的应用逐渐延迟。 这产生由频率辐条组成的辐射图案; 每个辐条具有独特的频率，并以独特的方向辐射。 通过注意接收到的信号的频率，飞机可以确定其相对于发射机的角位置。

公开(公告)号：US3757337A

公开(公告)日：1973-09-04

申请号：US3757337D

申请日：1970-09-11

申请人： LITCHFORD G

发明人： LITCHFORD G

IPC分类号： G01S1/54 ,  G01S1/44

CPC分类号： G01S1/54

摘要： Precision guidance of aircraft throughout a great volume of positions, and with spectrum economy, is achieved with coordinated scanning of coarse and fine coverage localizer antennas and coarse and fine glide-path antennas. The scan coordination is predetermined for sequential traversals of the useful scan sectors, microwave transmission through the several antennas being effected in the sequence of the scans. Each such transmission includes modulation not only in accordance with the antenna scan angle but also with the direction of movement in the scan sector. The aircraft receiver means detects the aircraft position by the detected modulation and/or reception timing of each directionally transmitted beam. General position is determinable from reception of the wide-angle (coarse) scanning beams. Precise guidance in the vicinity of a predetermined lowangle glide path is derivable from the beams transmitted through the narrow scan antennas.

摘要翻译： 通过协调扫描粗略和精细的覆盖定位天线以及粗略和精细的滑翔天线，实现飞机在大量位置和频谱经济性方面的精确指导。 扫描协调对于有用的扫描扇区的顺序遍历是预定的，通过几个天线的微波传输是按扫描顺序实现的。 每个这样的传输包括不仅根据天线扫描角度而且与扫描扇区中的移动方向相关的调制。 飞机接收机装置通过检测到的每个定向发射的波束的调制和/或接收定时来检测飞机的位置。 从广角（粗）扫描光束的接收可以确定一般位置。 在预定的低角度滑行路径附近的精确引导可从通过窄扫描天线传输的波束导出。

公开(公告)号：US3748590A

公开(公告)日：1973-07-24

申请号：US3748590D

申请日：1972-04-14

申请人： SINGER CO

发明人： GRAY J

IPC分类号： G01R23/02 ,  G01R23/173 ,  G01S1/54 ,  G01S1/60 ,  G01S13/50 ,  H03L7/02 ,  H03L7/06 ,  H03L7/087 ,  H03B3/10

CPC分类号： H03L7/087

摘要： A frequency tracker in which the input frequency to be tracked is first heterodyned by a pair of signals, in phase quadrature, at a first reference frequency thereby producing a pair of filtered signals, in phase quadrature, proportional to the difference in frequency between the input and reference frequency. The time derivative is taken of each of these filtered signals. The outputs of each of the differentiators are multiplied together with the filtered output of the opposite channel, with the multiplied outputs combined to form a signal proportional to the input power and the difference in frequency between the input and reference frequency. The combined outputs are integrated to provide an error signal, proportional to the frequency difference, which is periodically applied to the reference frequency oscillator to adjust its frequency so that it is more closely aligned with the input frequency.

摘要翻译： 要跟踪的输入频率首先以相位正交的第一参考频率的一对信号外差的频率跟踪器，从而产生与输入之间的频率差成比例的相位正交的一对滤波信号 和参考频率。 对这些滤波信号中的每一个采取时间导数。 每个微分器的输出与相反通道的滤波输出相乘，其中相乘的输出被组合以形成与输入功率成正比的信号和输入和参考频率之间的频率差。 组合的输出被集成以提供与频率差成比例的误差信号，其周期性地施加到参考频率振荡器以调整其频率，使得其与输入频率更紧密地对准。

公开(公告)号：US3714657A

公开(公告)日：1973-01-30

申请号：US3714657D

申请日：1970-06-25

申请人： LAITRAM CORP

发明人： LAPEYRE J

IPC分类号： G01C3/00 ,  G01S1/70 ,  G01S11/12 ,  G01S1/54

CPC分类号： G01S11/12 ,  G01C3/00 ,  G01S1/70

摘要： A method and apparatus for providing a position location based on transmission of substantially parallel, collimated, coherent signal beams from a reference position, the beams being rotated in fixed parallel relation to one another about the reference position. The determination of the distance of the receiving position from the reference position, or the determination of the azimuth of the receiving position from a predetermined reference direction through the reference position, or both, is determined according to incremental angular rotation of the beams independently of the angular velocity of rotation.

公开(公告)号：US3349399A

公开(公告)日：1967-10-24

申请号：US52946166

申请日：1966-02-23

申请人： INT STANDARD ELECTRIC CORP

发明人： MANFRED BOHM

IPC分类号： B64F1/18 ,  G01S1/02 ,  G01S1/54 ,  G01S1/58

CPC分类号： G01S1/58 ,  B64F1/18 ,  G01S1/02 ,  G01S1/54

公开(公告)号：US3202994A

公开(公告)日：1965-08-24

申请号：US21255462

申请日：1962-07-26

申请人： CSF

发明人： PAUL FOMBONNE

IPC分类号： G01S1/02 ,  G01S1/54 ,  G01S1/60

CPC分类号： G01S1/60 ,  G01S1/02 ,  G01S1/54