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    • 5. 发明授权
    • System for reducing multipath fade of RF signals in a wireless data application
    • 用于在无线数据应用中减少RF信号的多径衰落的系统
    • US06778844B2
    • 2004-08-17
    • US09770542
    • 2001-01-26
    • Charles D. Hood, III
    • Charles D. Hood, III
    • H04M100
    • H01Q1/2258H01Q1/22H01Q3/06H01Q3/24H04B7/0408
    • In a wireless LAN, a technique for mitigating the effects of signal fading that results from multipath propagation. The wireless LAN includes a number of portable clients that, in one embodiment, may be notebook computers. An access point, or hub, couples the clients to a wired network and/or to each other. Multipath effects are mitigated in one embodiment by continually varying the radiation pattern of a transmitting antenna system associated with the access point. In one embodiment, the radiation pattern of a receiving antenna system is continually varied. Numerous approaches are provided to continually vary the radiation pattern of the respective antenna system, including, but not limited to, switching between two or more antennas in an array, adjusting the physical positioning of a single or multiple antennas, adjusting the effective length of the antenna, and adjusting the respective gain and/or phase of each of one or more of the signals coupled to antennas in an array.
    • 在无线局域网中,减轻由多径传播引起的信号衰落的影响的技术。 无线LAN包括在一个实施例中可以是笔记本电脑的多个便携式客户端。 接入点或集线器将客户端耦合到有线网络和/或彼此。 在一个实施例中,通过连续地改变与接入点相关联的发射天线系统的辐射模式来减轻多径效应。 在一个实施例中,接收天线系统的辐射图是不断变化的。 提供了许多方法以连续地改变相应天线系统的辐射图,包括但不限于在阵列中的两个或多个天线之间切换,调整单个或多个天线的物理定位,调整有效长度 天线,并且调整耦合到阵列中的天线的一个或多个信号中的每一个的相应增益和/或相位。
    • 7. 发明授权
    • Apparatus for non-disruptively interconnecting perpheral device modules
with a host device
    • 用于不间断地将主设备模块与主机设备互连的设备
    • US5625238A
    • 1997-04-29
    • US383394
    • 1995-02-03
    • Roger W. AdyCharles D. Hood, IIIWilliam R. Groves
    • Roger W. AdyCharles D. Hood, IIIWilliam R. Groves
    • G06F13/40G06F13/00
    • G06F13/4081
    • The apparatus permits non-disruptive addition and removal of PCMCIA modules from a host device. The host device includes a signal bus connected to mating pins of the card header. The card header has a three-sided frame into which a module is inserted. A switch disposed on an edge of the header is responsive to insertion and de-insertion of the module. The length of the mating pins vary where selected mating pins of the card header have a first length for detecting substantially complete insertion and partial de-insertion of the module, and pins of a second length for applying bus signals to the module. Pins of a third length facilitate applying electrical power to the module. The computer is responsive to the switch and the mating pins such that the signal bus is deactivated to prevent corruption of the bus signals when the switch detects insertion of the module. The signal bus remains deactivated until the module is in communication with pins of a first length, whereupon the signal bus is then reactivated. This prevents electrical transients from reaching the bus. Additionally, the signal bus is deactivated upon partial de-insertion of the module when the module is no longer in communication with pins of first length. The signal bus remains deactivated until the switch detects complete de-insertion of the module, whereupon the signal bus is then reactivated.
    • 该设备允许从主机设备不间断地添加和删除PCMCIA模块。 主机设备包括连接到卡片头的配合销的信号总线。 卡片头具有插入模块的三面框架。 设置在标题的边缘上的开关响应于模块的插入和解除插入。 匹配引脚的长度变化,其中卡片头的选定的配合引脚具有用于检测模块的基本上完全插入和部分去插入的第一长度,以及用于将总线信号施加到模块的第二长度的引脚。 第三长度的引脚有助于向模块施加电力。 计算机响应于开关和配合销,使得信号总线被停用以防止当开关检测到模块的插入时总线信号的损坏。 信号总线保持禁用,直到模块与第一长度的引脚通信,然后信号总线被重新激活。 这可以防止电气瞬变到达总线。 此外,当模块不再与第一长度的引脚通信时,信号总线在模块的部分解除插入时被去激活。 信号总线保持禁用,直到交换机检测到模块完全取消插入,然后重新激活信号总线。