公开(公告)号：US4007437A

公开(公告)日：1977-02-08

申请号：US606045

申请日：1975-08-20

申请人： Maurice Ward Widener

发明人： Maurice Ward Widener

IPC分类号： G01S1/54 ,  G01S1/72

CPC分类号： G01S1/54 ,  G01S1/72

摘要： A method of creating a highly directional acoustic beam that can be swept er the water near the entrance of a harbor or channel location. The information provided to a boat operator as a result of the acoustic beam includes the operator's absolute bearing from the acoustic source. The nonlinear acoustic beam has a narrow beamwidth and is produced by small transducers that can be rotated in a selected scanning motion to provide a sequence of acoustic signals easily recognizable by the unaided human air of the boat operator who is cognizant of the acoustic sequence.

摘要翻译： 一种创建可以在靠近港口或通道位置的入口附近的水面上扫过的高度定向的声束的方法。 作为声束结果提供给船舶操作员的信息包括操作者从声源的绝对方位。 非线性声束具有窄的波束宽度，并且由小的换能器产生，该换能器可以以选定的扫描运动旋转，以提供容易识别船舶操作员的无声的人类空气的声学序列序列，该序列识别声学序列。

公开(公告)号：US3999182A

公开(公告)日：1976-12-21

申请号：US547525

申请日：1975-02-06

申请人： Alvin W. Moeller ,  Lucas G. Paskalakis ,  Wilfried G. Jaeckle, deceased ,  by Margarete Gesina Jaeckle ,  by Volkmar Gerhard Jaeckle, heirs

发明人： Alvin W. Moeller ,  Lucas G. Paskalakis ,  Wilfried G. Jaeckle, deceased ,  by Margarete Gesina Jaeckle ,  by Volkmar Gerhard Jaeckle, heirs

IPC分类号： H01Q3/38 ,  G01S1/54 ,  H01Q3/26 ,  H01Q3/34

CPC分类号： G01S1/54 ,  H01Q3/26 ,  H01Q3/34

摘要： An antenna and scanning means therefor particularly useful in an aircraft landing system operating in the microwave frequency range. The antenna is of the line phased array type which includes digitally controlled phase shifters for each of the radiating elements of the array. The beam formed by the antenna is steered by incrementing the phase shift applied at each of the array radiating elements by an amount of phase which is dependent in part upon the position of the radiating element in the array. Phase increments sufficient to shift the beam position by one coarse step (0.1.degree.) are applied to symmetrically located radiating element pairs, pair by pair, until all elements have been incremented. The beam is thereby caused to move through one coarse step in a number of fine steps equaling the number of pairs of elements in the array. An additional feature of the scanning means is the application of phase increment to the array elements in a pseudo-random sequence.

摘要翻译： 一种天线和扫描装置，其特别适用于在微波频率范围内工作的飞机着陆系统。 该天线是线相控阵列类型，其包括用于阵列的每个辐射元件的数字控制移相器。 由天线形成的波束通过将在每个阵列辐射元件处施加的相移递增一部分取决于辐射元件在阵列中的位置的相位的量来转向。 相位增量足以将光束位置移动一个粗略步长（0.1°），一对一对地施加到对称定位的辐射元件对上，直到所有元素都被递增。 由此使得光束以等于阵列中的元件对的数量的许多精细步骤移动通过一个粗略步骤。 扫描装置的附加特征是以伪随机序列向阵列元件施加相位增量。

公开(公告)号：US3911437A

公开(公告)日：1975-10-07

申请号：US43539074

申请日：1974-01-21

申请人： RAYTHEON CO

发明人： PLOUSSIOUS GEORGE

IPC分类号： G01S1/02 ,  G01S1/54 ,  G01S1/56 ,  G01S19/48 ,  G01S1/44

CPC分类号： G01S1/56 ,  G01S1/02 ,  G01S1/54

摘要： An aircraft instrument landing system is disclosed wherein elevation angle measurements of an aircraft are derived by providing, in such system, a means for inhibiting an elevation swept beam of radiation from sweeping through ''''low'''' angles where significant multipath transmission is expected. Means are provided to vary the power in the transmitted beam of radiation in a predetermined manner as the beam is inhibited from sweeping. As a result the radiation received by the low flying aircraft is shaped in a way related to the shape of the received radiation expected without multipath transmission. Such arrangement enables the same aircraft receiver and processor to determine the elevation angles of both ''''high'''' and low flying aircraft without appreciable error.

摘要翻译： 公开了一种飞行器仪表着陆系统，其中飞行器的仰角测量是通过在这种系统中提供一种用于禁止升高扫描的辐射束从预期显着的多径传输的“低”角度扫过的装置得出的。 提供了装置，以便当光束被禁止扫描时以预定的方式改变所发射的辐射束中的功率。 结果，由低飞行飞机所接收的辐射以与未经多路径传输的接收辐射的形状相关的方式成形。 这种布置使得相同的飞机接收机和处理器能够确定“高”和低飞行飞行器的仰角，而没有明显的误差。