Diversity antenna for UNII access point
    2.
    发明授权
    Diversity antenna for UNII access point 有权
    UNII接入点的分集天线

    公开(公告)号:US06781544B2

    公开(公告)日:2004-08-24

    申请号:US10091164

    申请日:2002-03-04

    IPC分类号: H01Q2100

    摘要: A combination of near omni-directional antennas and internal patch antennas, all built into an access point in accordance with FCC requirements. Typically a printed antenna array is used for the near omni-directional antenna, and the internal patch antenna is a TM10 mode stacked patch antenna. A mechanical detect switch changes antenna types automatically, depending on the rotation state of the antenna system. Alternately, a configuration utility enables a user to select the antenna type for the access point when it is installed in the field. This arrangement gives the UNII access point flexibility to be mounted in various orientations and match the characteristics of the antenna to the installation requirements.

    摘要翻译: 靠近全向天线和内部贴片天线的组合,全部内置于接入点,符合FCC要求。 通常,印刷天线阵列用于近端全向天线,内部贴片天线是TM10模式堆叠贴片天线。 机械检测开关根据天线系统的旋转状态自动更改天线类型。 或者,配置实用程序使用户能够在安装在现场时为接入点选择天线类型。 这种安排使UNII接入点的灵活性能够以各种方向安装,并将天线的特性与安装要求相匹配。

    Saw-based FSK modulating circuit
    3.
    发明授权
    Saw-based FSK modulating circuit 失效
    基于锯片的FSK调制电路

    公开(公告)号:US5367537A

    公开(公告)日:1994-11-22

    申请号:US65336

    申请日:1993-05-24

    申请人: Fred J. Anderson

    发明人: Fred J. Anderson

    IPC分类号: B60R25/00 G07C9/00 H04L27/12

    摘要: A frequency shift keying modulating circuit produces a first frequency according to a surface acoustic wave transducer natural resonant frequency and a second frequency according to the surface acoustic wave in combination with a reactive element. The frequency selected is determined by the state of a PIN switching diode in parallel with the reactive element.

    摘要翻译: 频移键控调制电路根据声表面波换能器自然谐振频率和与反应元件结合的声表面波的第二频率产生第一频率。 选择的频率由PIN开关二极管与无功元件并联的状态决定。

    Adaptive AM audio processor
    5.
    发明授权
    Adaptive AM audio processor 失效
    自适应AM音频处理器

    公开(公告)号:US4866779A

    公开(公告)日:1989-09-12

    申请号:US218636

    申请日:1988-07-13

    IPC分类号: H03G5/24 H04H1/00 H04H20/49

    CPC分类号: H04H20/49 H03G5/24

    摘要: An audio processor for adaptively rejecting undesired noise and interference in an audio input which includes a variable Q, 10 kHz switched capacitor notch filter. The Q of the notch filter is varied by a control loop responsive to the 10 kHz content of the audio signal. The notch filter includes a summer section that is clocked at a predetermined frequency, and an integrator section which is clocked at a multiple of the predetermined frequency in order to prevent center frequency variation with changes in Q of the notch filter.

    摘要翻译: 一种音频处理器,用于自适应地拒绝包括可变Q,10kHz开关电容器陷波滤波器的音频输入中的不期望的噪声和干扰。 通过响应于音频信号的10kHz内容的控制环来改变陷波滤波器的Q。 陷波滤波器包括以预定频率计时的加法器部分和以预定频率的倍数计时的积分器部分,以便防止随着陷波滤波器Q的变化的中心频率变化。

    Start of packet detection for multiple receiver combining and multiple input multiple output radio receivers
    6.
    发明授权
    Start of packet detection for multiple receiver combining and multiple input multiple output radio receivers 有权
    多个接收机组合和多输入多输出无线电接收机的分组检测开始

    公开(公告)号:US07809020B2

    公开(公告)日:2010-10-05

    申请号:US11757878

    申请日:2007-06-04

    IPC分类号: H04J3/06

    CPC分类号: H04W24/00

    摘要: A method and an apparatus for detecting the start-of-packet in a wireless receiver operating in a packetized wireless network. One method embodiment includes calculating a plurality of start of packet (SOP) indicators, each for one or more of a plurality of receive chains in the receiver; determining one or more linear combinations of respective pluralities of the calculated SOP indicators to form one or more combined SOP indicators; comparing each of a plurality of SOP indicators or combined SOP indicators, including at least one of the combined SOP indicators to a respective threshold to form one or more respective SOP events; and, in the case there is more than one SOP event, determining a logic function of the SOP events to form a SOP decision event.

    摘要翻译: 一种在分组化无线网络中操作的无线接收机中检测分组开始的方法和装置。 一种方法实施例包括:计算多个开始分组(SOP)指示符,每个指示符针对接收机中的多个接收链中的一个或多个; 确定相应多个所计算的SOP指示符的一个或多个线性组合以形成一个或多个组合的SOP指示符; 将包括组合的SOP指示符中的至少一个的多个SOP指示符或组合的SOP指示符中的每一个相对应的阈值相比较以形成一个或多个相应的SOP事件; 并且在存在多于一个SOP事件的情况下,确定SOP事件的逻辑功能以形成SOP决定事件。

    Stacked patch antenna
    9.
    发明授权
    Stacked patch antenna 有权
    堆叠贴片天线

    公开(公告)号:US06759986B1

    公开(公告)日:2004-07-06

    申请号:US10146609

    申请日:2002-05-15

    IPC分类号: H01Q138

    CPC分类号: H01Q9/0414

    摘要: A stacked patch antenna is disclosed which includes a first antenna element and a second antenna element for cooperating with the first antenna element. These antenna elements are preferably a passive parasitic element in combination with a driven element. A flexible substrate is provided having first and second opposing surfaces, each respectively in contact with the first and second antenna elements. The flexible substrate preferably has a desired dielectric property to provide a desired capacitance between the antenna elements. One or both of the antenna elements are formed on the respective opposing surface. The antenna element is preferably formed by printing.

    摘要翻译: 公开了一种堆叠贴片天线,其包括用于与第一天线元件配合的第一天线元件和第二天线元件。 这些天线元件优选地是与被驱动元件组合的无源寄生元件。 提供了柔性基板,其具有分别与第一和第二天线元件接触的第一和第二相对表面。 柔性基板优选地具有期望的介电特性,以在天线元件之间提供期望的电容。 一个或两个天线元件形成在相应的相对表面上。 天线元件优选通过印刷形成。

    Low power UHF data transceiver
    10.
    发明授权
    Low power UHF data transceiver 失效
    低功率UHF数据收发器

    公开(公告)号:US5146613A

    公开(公告)日:1992-09-08

    申请号:US614488

    申请日:1990-11-16

    申请人: Fred J. Anderson

    发明人: Fred J. Anderson

    CPC分类号: H04B1/30 H04B1/403

    摘要: A transceiver has an RF oscillator stage shared by the receiving and transmitting modes. The RF oscillator has a feedback loop incorporating a SAW delay line. A switching arrangement selectively couples the antenna to the transmission circuit and optionally couples the antenna to the receiving circuit. The RF oscillator stage is isolated from switching perturbations by small capacitors at the input and at the output of the oscillator.