利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

30 条记录 (耗时 0.013 秒)

    Efficient wideband waveform generation and signal processing design for an active multi-beam ESA digital radar system
    1.
    发明授权
    Efficient wideband waveform generation and signal processing design for an active multi-beam ESA digital radar system 失效
    用于有源多波束ESA数字雷达系统的高效宽带波形生成和信号处理设计

    公开(公告)号：US06778137B2

    公开(公告)日：2004-08-17

    申请号：US10106335

    申请日：2002-03-26

    申请人： Kapriel V. Krikorian ,  Robert A. Rosen

    发明人： Kapriel V. Krikorian ,  Robert A. Rosen

    IPC分类号： H01Q324

    CPC分类号： H01Q25/00 ,  G01S7/282 ,  G01S13/426 ,  H01Q3/26

    摘要： An efficient digital wideband waveform generation and signal processing system for multi-beam electronically scanned antenna array (ESA) radar systems. The digital waveform generator (50) first produces a series of waveform phase angles corresponding to the phase angles of a common signal to be transmitted by the ESA. Then, for each antenna element, the waveform phase angles are adjusted to steer the beam by adding a time delay and a phase adjustment. A digital signal is then produced for each antenna element by applying a cosine function to the adjusted phase angles. In the illustrative embodiment, this is accomplished using a cosine look-up table (14). Each digital cosine wave is then stored in a serial memory buffer (16A to 16L) in preparation for conversion to digital. Each of digital signals is passed through a digital to analog converter (18A to 18L) and an RF filter (20A to 20L) at each antenna element. The resulting analog signals are each amplified by a power amplifier (22A to 22L), and then sent through a wideband circulator (24A to 24L) to an antenna element (26A to 26L). On receive, at each antenna element (26A to 26L), a wideband linear amplifier (30A to 30L) and an RF filter (32A to 32L) provide rejection of out of band signals while providing amplification and signal conditioning for the following analog to digital converter (34A to 34L). The resulting digital signals (one for each element) are sent through the (36A to 36L) which separate each digital signal into N frequency channels. A digital beam formation unit (38A to 38N) for each frequency channel then forms multiple digital simultaneous beams by combining like frequency channels from each antenna element with an added phase adjustment.

    摘要翻译： 一种用于多光束电子扫描天线阵列（ESA）雷达系统的高效数字宽带波形生成和信号处理系统。 数字波形发生器（50）首先产生一系列与由ESA发射的公共信号的相位角对应的波形相位角。 然后，对于每个天线元件，调整波形相位角以通过添加时间延迟和相位调整来引导波束。 然后通过对调整后的相位角应用余弦函数，为每个天线元件产生数字信号。 在说明性实施例中，这是使用余弦查找表（14）来实现的。 然后将每个数字余弦波存储在串行存储器缓冲器（16A至16L）中，以准备转换为数字。 每个数字信号通过数模转换器（18A至18L）和每个天线元件处的RF滤波器（20A至20L）。 所得到的模拟信号各自由功率放大器（22A至22L）放大，然后通过宽带环行器（24A至24L）发送到天线元件（26A至26L）。 在接收时，在每个天线元件（26A至26L）处，宽带线性放大器（30A至30L）和RF滤波器（32A至32L）提供带外信号的抑制，同时为随后的模数转换器提供放大和信号调节 转换器（34A至34L）。 所得到的数字信号（每个元件一个）通过（36A至36L）发送，其将每个数字信号分成N个频率信道。 每个频道的数字波束形成单元（38A至38N）然后通过组合来自每个天线元件的类似的频率信道和相加的相位调整来形成多个数字同时波束。

    Phased array antenna system generating multiple beams having a common phase center
    2.
    发明授权
    Phased array antenna system generating multiple beams having a common phase center 失效
    相控阵天线系统产生具有公共相位中心的多个波束

    公开(公告)号：US06597312B1

    公开(公告)日：2003-07-22

    申请号：US10058336

    申请日：2002-01-30

    申请人： Peter D. Hrycak

    发明人： Peter D. Hrycak

    IPC分类号： H01Q324

    CPC分类号： H01Q3/30 ,  H01Q25/00

    摘要： An electronically scanned phased array antenna system which utilizes phase-only control in the generation of multiple beams simultaneously and having a coincident or common phase center so that the entire aperture is used to radiate available RF energy, thus using all of the RF power that the aperture can radiate.

    摘要翻译： 一种电子扫描的相控阵天线系统，其利用相位控制同时产生多个波束并具有重合或共同的相位中心，使得整个孔径被用于辐射可用的RF能量，从而使用所有的RF功率 光圈可以辐射。

    Compensation of faulty elements in array antennas
    3.
    发明授权
    Compensation of faulty elements in array antennas 有权
    阵列天线中故障元件的补偿

    公开(公告)号：US06339398B1

    公开(公告)日：2002-01-15

    申请号：US09539449

    申请日：2000-03-30

    申请人： Jonatan Redvik ,  Bengt Inge Svensson

    发明人： Jonatan Redvik ,  Bengt Inge Svensson

    IPC分类号： H01Q324

    CPC分类号： H01Q3/267

    摘要： A method and a system are disclosed compensating for failed elements in an antenna array. The method assumes that at least the amplitude and, in most cases, the phase of, at least, some of the individual elements can be controlled to some extent. If one or more of the antenna array radiating elements are failed, at least some remaining elements are used to correct for this. The amplitude and phase radiation pattern of one of the failed elements is then synthesized using K of the remaining elements. The resulting excitation from this synthesis is superimposed on the failed array excitation at the positions of the K remaining elements. This procedure can be repeated for all the failed elements using the principle of superposition. A system utilizing the present method controls via a control unit a T/R module the phase and amplitude of each operating antenna array radiator

    摘要翻译： 公开了一种补偿天线阵列中的故障元件的方法和系统。 该方法假设至少可以在一定程度上控制至少一些单个元件的振幅和大多数情况下的相位。 如果天线阵列辐射元件中的一个或多个发生故障，则使用至少一些剩余元件来校正这一点。 然后使用剩余元素的K合成一个故障元件的幅度和相位辐射图。 从该合成得到的激发叠加在K个剩余元素的位置上的失效阵列激发上。 可以使用叠加原理对所有故障元素重复此过程。 利用本方法的系统通过控制单元控制T / R模块，每个操作天线阵列辐射器的相位和幅度

    Ferroelectric/paraelectric/composite material loaded phased array network
    5.
    发明授权
    Ferroelectric/paraelectric/composite material loaded phased array network 失效
    铁电/顺电/复合材料加载相控阵

    公开(公告)号：US06456236B1

    公开(公告)日：2002-09-24

    申请号：US09841147

    申请日：2001-04-24

    申请人： Bryan L. Hauck ,  James B. West

    发明人： Bryan L. Hauck ,  James B. West

    IPC分类号： H01Q324

    CPC分类号： H01Q3/44

    摘要： The present invention is directed generally to phased array antennas. The invention allows for the realization of a low-cost, ferroelectric material loaded feed manifold for phase shifting an antenna. This type of architecture can take many forms, with the preferred embodiment being waveguide. In an embodiment of the present invention, the Ferroelectric/Paralectric/Composite material loaded feed manifold described herein may solve the space/weight problem by integrating the material into the traditional waveguide feed manifold. A feed structure suitable for receiving and routing electromagnetic energy may include a subassembly including material suitable for shifting phase of electromagnetic radiation when an electrical field is applied. Material having a dielectric constant at least one of equal to and greater than the phase shifting material may also be included.

    摘要翻译： 本发明一般涉及相控阵天线。 本发明允许实现用于相移天线的低成本铁电材料负载进料歧管。 这种类型的架构可以采取许多形式，优选实施例是波导。 在本发明的一个实施例中，本文所述的铁电/旁路/复合材料加载进料歧管可以通过将材料集成到传统的波导进料歧管中来解决空间/重量问题。 适于接收和布置电磁能的馈送结构可以包括子组件，其包括适用于在施加电场时移动电磁辐射相位的材料。 还可以包括具有等于或大于相移材料中的至少一个介电常数的材料。

    Antenna device for transmitting and/or receiving RF waves
    6.
    发明授权
    Antenna device for transmitting and/or receiving RF waves 有权
    用于发射和/或接收RF波的天线装置

    公开(公告)号：US06392610B1

    公开(公告)日：2002-05-21

    申请号：US09712131

    申请日：2000-11-15

    申请人： Christian Braun ,  Olov Edvardsson ,  Leif Eriksson ,  Liu Donghui

    发明人： Christian Braun ,  Olov Edvardsson ,  Leif Eriksson ,  Liu Donghui

    IPC分类号： H01Q324

    CPC分类号： H01Q9/26 ,  H01Q1/243 ,  H01Q1/38 ,  H01Q3/24 ,  H01Q9/28

    摘要： An antenna device for transmitting and/or receiving RF waves connectable to a radio communication device and including a radiating structure with at least two switchable antenna elements. At least one switching element, arranged in a central switching unit, selectively connects and disconnects the at least two switchable antenna elements. The at least two antenna elements can be individually switched between different coupling states by the central switching unit. The central switching unit has a control port for reception of control signals enabling the central switching unit to effect a centralized switching of said at least two switchable antenna elements.

    摘要翻译： 一种用于发送和/或接收可连接到无线电通信设备并且包括具有至少两个可切换天线元件的辐射结构的RF波的天线设备。 布置在中央交换单元中的至少一个开关元件选择性地连接和断开至少两个可切换天线元件。 至少两个天线元件可以由中央交换单元在不同的耦合状态之间单独切换。 中央交换单元具有用于接收控制信号的控制端口，使得中央交换单元能够实现所述至少两个可切换天线元件的集中式切换。

    Compact, wide-band, integrated active module for radar and communication systems
    7.
    发明授权
    Compact, wide-band, integrated active module for radar and communication systems 有权
    紧凑，宽带，集成的雷达和通信系统有源模块

    公开(公告)号：US06714169B1

    公开(公告)日：2004-03-30

    申请号：US10309497

    申请日：2002-12-04

    申请人： Loc B. Chau ,  Kuan M. Lee ,  John S. Williams

    发明人： Loc B. Chau ,  Kuan M. Lee ,  John S. Williams

    IPC分类号： H01Q324

    CPC分类号： H01Q21/061 ,  G01S7/032 ,  H01Q23/00

    摘要： An integrated module for an active antenna assembly is disclosed. The integrated module is switchable between a receive mode and a transmit mode and includes active components and a dual input wideband balun. The active components includes amplifiers and micro electro-mechanical system (MEMS) switches. The integrated module is adapted for positioning directly behind a radiator of an antenna array.

    摘要翻译： 公开了一种用于有源天线组件的集成模块。 集成模块可在接收模式和发送模式之间切换，并包括有源组件和双输入宽带平衡 - 不平衡变压器。 有源器件包括放大器和微机电系统（MEMS）开关。 集成模块适于直接定位在天线阵列的辐射器的后面。

    Active antenna roof top system and method
    8.
    发明授权
    Active antenna roof top system and method 有权
    主动天线屋顶系统及方法

    公开(公告)号：US06710742B1

    公开(公告)日：2004-03-23

    申请号：US10002518

    申请日：2001-10-23

    申请人： Sheldon K. Meredith

    发明人： Sheldon K. Meredith

    IPC分类号： H01Q324

    CPC分类号： H01Q3/28

    摘要： Disclosed are systems and methods for providing amplitude or power adjustment of a plurality of corresponding signals by shifting power among various outputs associated with the corresponding signals. Accordingly, power steering circuitry of the present invention is provided in a signal path to accept input signals and distribute the power of the input signal among output signals. A preferred embodiment of the power steering circuitry of the present invention provides a multiple stage configuration wherein a first stage operates to shift power and select a power bias among subsets of the outputs while a subsequent stage or stages provide further granularity with respect to shifting of power among the outputs. According to a preferred embodiment, power shifters include an arrangement of back-to-back hybrid combiners having phase adjusting circuitry disposed there between. Accordingly, a preferred embodiment of the power steering circuitry of the present invention provides a matrix of back-to-back hybrid combiners to provide desired steering of signal power.

    摘要翻译： 公开了通过在与相应信号相关联的各种输出之间移动功率来提供多个对应信号的幅度或功率调整的系统和方法。 因此，本发明的动力转向电路被提供在信号路径中以接受输入信号并在输出信号之间分配输入信号的功率。 本发明的动力转向电路的优选实施例提供多级配置，其中第一级操作以移位功率并在输出的子集中选择功率偏置，而随后的级或级在功率变换方面提供进一步的粒度 的产出。 根据优选实施例，功率转换器包括背对背混合组合器的布置，其中设置有相位调整电路。 因此，本发明的动力转向电路的优选实施例提供背对背混合组合器的矩阵，以提供期望的信号功率转向。