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    Antenna array pattern distortion mitigation
    5.
    发明申请
    Antenna array pattern distortion mitigation 有权

    公开(公告)号：US20060223587A1

    公开(公告)日：2006-10-05

    申请号：US11182236

    申请日：2005-07-15

    申请人： Ivan Fernandez-Corbaton ,  Ahmad Jalali ,  Ernest Ozaki ,  Harris Simon ,  Sherman Gregory

    发明人： Ivan Fernandez-Corbaton ,  Ahmad Jalali ,  Ernest Ozaki ,  Harris Simon ,  Sherman Gregory

    IPC分类号： H04M1/00

    CPC分类号： H01Q25/00

    摘要： At least one feature provides a way to perform point-to-multipoint transmissions using adaptive or directional antennas while reducing antenna pattern distortion. Generally, rather than transmitting the same waveform to two or more receivers, an information-bearing signal is transformed into different decorrelated waveforms and each decorrelated waveform is transmitted to a different receiver. In one implementation, an information-bearing signal is transformed into two decorrelated signals such that their crosscorrelation, or autocorrelation of the information-bearing signal, is zero or very small. Such decorrelation may be achieved by sending a first signal to a first receiver while sending a second signal, having a radio frequency spectrum that is the spectrally inverted version of the first signal, to a second receiver. In another implementation, a first signal is transmitted to a first receiver and is also transmitted to a second receiver with a time delay.

    Methods and apparatus for beam steering using steerable beam antennas with switched parasitic elements
    6.
    发明授权
    Methods and apparatus for beam steering using steerable beam antennas with switched parasitic elements 有权
    使用具有切换寄生元件的可转向波束天线的波束转向的方法和装置

    公开(公告)号：US08421684B2

    公开(公告)日：2013-04-16

    申请号：US12571667

    申请日：2009-10-01

    申请人： Noam Livneh ,  Raphael Katsner ,  Ernest Ozaki ,  Vered Bar Bracha ,  Mohammad A. Tassoudji

    发明人： Noam Livneh ,  Raphael Katsner ,  Ernest Ozaki ,  Vered Bar Bracha ,  Mohammad A. Tassoudji

    IPC分类号： H01Q1/24

    CPC分类号： H01Q3/247 ,  H01Q3/26 ,  H01Q3/446 ,  H01Q9/18 ,  H01Q9/32 ,  H01Q19/32 ,  H01Q21/293

    摘要： An antenna is described. The antenna includes a planar circular structure. The antenna also includes a radiating element located at the center of the planar circular structure. The antenna further includes one or more parasitic elements located on a contour around the radiating element. The parasitic elements are aligned in parallel direction with the radiating element. The parasitic elements protrude from the planar circular structure. The antenna includes switches separating each of the one or more parasitic elements from ground. A switch in a first position creates a short between a parasitic element and ground. A switch in a second position creates an open circuit between the parasitic element and ground.

    摘要翻译： 描述天线。 天线包括平面圆形结构。 天线还包括位于平面圆形结构的中心处的辐射元件。 天线还包括位于辐射元件周围轮廓上的一个或多个寄生元件。 这些寄生元件与辐射元件平行排列。 寄生元件从平面圆形结构突出。 天线包括将一个或多个寄生元件中的每一个与地分开的开关。 第一位置的开关在寄生元件和地之间产生短路。 处于第二位置的开关在寄生元件和地之间产生开路。