公开(公告)号：US3938159A

公开(公告)日：1976-02-10

申请号：US506830

申请日：1974-09-17

申请人： James S. Ajioka ,  Kenneth L. Schaffer

发明人： James S. Ajioka ,  Kenneth L. Schaffer

IPC分类号： H01Q5/00 ,  H01Q5/45 ,  H01Q13/02 ,  H01Q19/08 ,  H01Q15/24

CPC分类号： H01Q19/08 ,  H01Q13/0225 ,  H01Q5/45

摘要： A dual frequency band horn-type antenna feed is described which has primary application to optimally illuminate a parabolic cylindrical reflector operating simultaneously at high power in both of the two bands. The principle of the invention is applicable to any two frequency bands regardless of their frequency separation including coincidence as a limiting case. The basic requirement of such a feed is that it must be as directive as possible within constraint of the feed aperture size in the plane of the cylinder axis because the cylindrical reflector does not collimate the beam in this plane and it must be relatively nondirective in the plane of the parabola for efficient illumination of the reflector. This requirement requires the phase front in the directive plane to be controlled within a small fraction of a wavelength at both frequencies.

摘要翻译： 描述了一种双频带喇叭型天线馈电，其主要应用是最佳地照亮两个频带中的两个高功率同时工作的抛物​​面圆筒形反射器。 本发明的原理可应用于任何两个频带，而不管其频率间隔如何，包括重合作为限制性情况。 这种进料的基本要求是在圆筒轴平面内的进料孔径尺寸的约束下，它必须是尽可能的指导，因为圆柱形反射器不会在该平面内准直光束，并且在该平面中它必须是相对非定向的 抛物线的平面，用于有效地照射反射体。 该要求要求在两个频率下将指向平面中的相位前沿控制在波长的一小部分内。

公开(公告)号：US5874915A

公开(公告)日：1999-02-23

申请号：US907569

申请日：1997-08-08

申请人： Jar J. Lee ,  Ruey S. Chu ,  Kenneth L. Schaffer

发明人： Jar J. Lee ,  Ruey S. Chu ,  Kenneth L. Schaffer

IPC分类号： H01Q3/24 ,  H01Q21/06 ,  H01Q21/20 ,  H01Q3/22

CPC分类号： H01Q3/242 ,  H01Q21/067 ,  H01Q21/205 ,  H01Q3/247

摘要： A wideband electronically scanned cylindrical array includes an array of end-fire radiating elements, the elements arranged in a first plurality of columns, the columns arranged radially about a center axis of the array. A beamforming network is connected to the array of radiating elements. The beamforming network includes a power divider circuit for dividing an input RF drive signal into a second plurality of drive signals, and a matrix of electronically controlled transfer switches. A true time delay network comprising a third plurality of delay lines couples respective ones of the drive signals to the matrix of transfer switches. A third plurality of transmit amplifiers is coupled to the matrix of transfer switches, each amplifier for amplifying a respective one of the drive signals. The beamforming network further includes apparatus for coupling the amplified drive signals to selected ones of the columns of radiating elements. A beamforming controller is connected to the coupling apparatus and the matrix of transfer switches for selecting sectors of the columns of radiating elements to be driven by the drive signals to form a desired beam. The columns of radiating elements are arranged in a circularly symmetric fashion about the axis in the disclosed embodiment.

摘要翻译： 宽带电子扫描的圆柱形阵列包括端射辐射元件的阵列，所述阵列布置在第一多个列中，所述列围绕阵列的中心轴径向排列。 波束成形网络连接到辐射元件阵列。 波束成形网络包括用于将输入RF驱动信号分成第二多个驱动信号的功率分配器电路和电子控制的转换开关的矩阵。 包括第三多个延迟线的真实时间延迟网络将相应的驱动信号耦合到传送开关的矩阵。 第三多个发射放大器耦合到转换开关的矩阵，每个放大器用于放大相应的一个驱动信号。 波束形成网络还包括用于将放大的驱动信号耦合到选定的辐射元件列的装置。 波束成形控制器连接到耦合装置和转移开关矩阵，用于选择由驱动信号驱动的辐射元件的列的扇区以形成期望的波束。 在所公开的实施例中，辐射元件的列以关于轴的圆对称方式布置。