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    • 21. 发明申请
    • Digital control architecture for a tunable impedance surface
    • 用于可调阻抗表面的数字控制架构
    • US20080284674A1
    • 2008-11-20
    • US11803752
    • 2007-05-15
    • Paul R. HerzDaniel F. Sievenpiper
    • Paul R. HerzDaniel F. Sievenpiper
    • H01Q15/00H01Q3/00
    • H01Q21/065H01Q21/29
    • A digitally controlled tunable impedance surface. The tunable impedance surface is of the type having a two dimensional array of conducting plates disposed adjacent a dielectric medium; a ground plane spaced from the two dimensional array of conducting plates, the dielectric medium occurring at least between and separating the two dimensional array of conducting plates and the ground plane; and conductors coupling alternating ones of the conducting plates to the ground plane. A plurality of voltage controlled capacitors are coupled between adjacent plates in the two dimensional array of conducting plates and an array of digital to analog converters are disposed preferably on or near the ground plane. Each digital to analog converter has analog output voltage pads coupled to selected ones of adjacent conducting plates and has at least a digital input for receiving digital words representing at least in part analog voltages to be applied to the selected ones of the adjacent conducting plates. The digital to analog converter may also have a digital output for serially coupled the received digital data words to downstream connected digital to analog converters.
    • 数字控制可调阻抗表面。 可调阻抗表面是具有邻近电介质设置的导电板的二维阵列的类型; 与导电板的二维阵列间隔开的接地平面,电介质至少在导电板和接地平面的二维阵列之间分离; 以及将导电板中的交替导体耦合到接地平面的导体。 多个压控电容器耦合在导电板的二维阵列中的相邻板之间,并且数模转换器阵列优选地设置在接地平面上或附近。 每个数模转换器具有耦合到所选择的相邻导电板的模拟输出电压焊盘,并且至少具有数字输入,用于接收表示至少部分模拟电压的数字字,以将其应用于所选择的相邻导电板。 数模转换器还可以具有用于将接收的数字数据字串行耦合到下游连接的数模转换器的数字输出。
    • 28. 发明授权
    • Multiband tunable impedance surface
    • 多频段可调阻抗表面
    • US08212739B2
    • 2012-07-03
    • US11803775
    • 2007-05-15
    • Daniel F. Sievenpiper
    • Daniel F. Sievenpiper
    • H01Q15/02
    • H01Q15/0066H01Q1/288H01Q3/46
    • A tunable impedance surface capable of steering a multiband radio frequency beam in two different, independently band-wise controllable directions. The tunable surface has a ground plane and a plurality of first conductive elements disposed in a first array a first distance therefrom, the first distance being less than a wavelength of a lower frequency band of the multiband radio frequency beam. A first capacitor arrangement controllably varies capacitance between selected ones of the first conductive elements. A plurality of second conductive elements are disposed in a second array a second distance from the plurality of first conductive elements, the second distance being less than a wavelength of a higher frequency band of the multiband radio frequency beam, the plurality of first conductive elements serving as a ground plane for the plurality of second conductive elements. A second capacitor arrangement controllably varies capacitance between selected ones of the second conductive elements.
    • 一个可调阻抗表面,能够在两个不同的独立带状可控方向上转向多频段射频波束。 可调表面具有接地平面和从第一距离设置在第一阵列中的多个第一导电元件,第一距离小于多频带射频波束的较低频带的波长。 第一电容器布置可控地改变所选择的第一导电元件之间的电容。 多个第二导电元件设置在距离多个第一导电元件第二距离的第二阵列中,第二距离小于多波段射频波束的较高频带的波长,多个第一导电元件用于 作为多个第二导电元件的接地平面。 第二电容器布置可控地改变所选择的第二导电元件之间的电容。