Tire pressure monitoring (TPM) system and method of operating the same
    1.
    发明授权
    Tire pressure monitoring (TPM) system and method of operating the same 有权
    轮胎压力监测(TPM)系统及其运行方法

    公开(公告)号:US07994905B2

    公开(公告)日:2011-08-09

    申请号:US12331484

    申请日:2008-12-10

    CPC classification number: B60C23/0408 B60C23/0433 B60C23/0466

    Abstract: There is provided an exemplary tire pressure monitoring (TPM) system that can use a half-duplex wireless link to communicate between one or more wheel-mounted sensor units and a vehicle-mounted transceiver unit. The half-duplex wireless link enables the sensor units to report sensor readings to the transceiver unit, and it enables the transceiver unit to make configuration changes to the sensor units for improved communication. Some examples of wireless settings that can be modified include modulation settings, data encoding/decoding settings, error correction settings, and transmission power settings.

    Abstract translation: 提供了可以使用半双工无线链路在一个或多个车轮安装的传感器单元和车载收发器单元之间通信的示例性轮胎压力监测(TPM)系统。 半双工无线链路使传感器单元能够将传感器读数报告给收发器单元,并使收发器单元能够对传感器单元进行配置更改,从而改善通信。 可以修改的无线设置的一些示例包括调制设置,数据编码/解码设置,纠错设置和传输功率设置。

    Antenna structures having adjustable radiation characteristics
    2.
    发明授权
    Antenna structures having adjustable radiation characteristics 有权
    具有可调辐射特性的天线结构

    公开(公告)号:US07639207B2

    公开(公告)日:2009-12-29

    申请号:US12207580

    申请日:2008-09-10

    CPC classification number: H01Q9/30 H01Q15/0013

    Abstract: The radiation properties and wave guiding properties of frequency selective surfaces are used in conjunction with closely spaced antenna elements to fabricate antenna structures having adjustable radiation characteristics. The direction, magnitude, and polarization of radiation patterns for such antenna structures can be adjusted by varying the texture or patterning of layers of conducting material forming the frequency selective surfaces. The invention enables the fabrication of low profile antenna structures that can easily be conformed or integrated into complex surfaces without sacrificing antenna performance.

    Abstract translation: 频率选择表面的辐射性质和波导特性与紧密间隔的天线元件结合使用,以制造具有可调辐射特性的天线结构。 可以通过改变形成频率选择表面的导电材料的层的纹理或图案来调节这种天线结构的辐射图案的方向,幅度和极化。 本发明能够制造可以容易地符合或集成到复杂表面中的低轮廓天线结构,而不牺牲天线性能。

    Methods and Simulation Tools for Predicting GPS Performance in the Broad Operating Environment
    3.
    发明申请
    Methods and Simulation Tools for Predicting GPS Performance in the Broad Operating Environment 有权
    在广泛的操作环境中预测GPS性能的方法和仿真工具

    公开(公告)号:US20090243914A1

    公开(公告)日:2009-10-01

    申请号:US12059853

    申请日:2008-03-31

    CPC classification number: G01S19/23 Y02T10/82

    Abstract: To facilitate GPS hardware selection and evaluate performance of vehicle integrated GPS hardware, including various types of GPS antennas and receivers, within different vehicle operating environments, embodiments of the invention are used to provide a simulator which does not require physical GPS hardware to simulate GPS system performance. Preferably, the simulator randomly generates one or more GPS system link budget variables, within predetermined performance bounds, in order to predict GPS system performance in a specific vehicle operating environment for a given antenna radiation pattern and/or GPS receiver. The simulator employs a Monte Carlo technique to evaluate the GPS system performance based on generated pools of link budget variables.

    Abstract translation: 为了便于GPS硬件的选择和评估车载GPS集成GPS硬件(包括各种类型的GPS天线和接收机)在不同车辆操作环境中的性能,本发明的实施例用于提供不需要物理GPS硬件来模拟GPS系统的模拟器 性能。 优选地,模拟器在预定的性能界限内随机地产生一个或多个GPS系统链路预算变量,以便预测用于给定天线辐射图和/或GPS接收机的特定车辆操作环境中的GPS系统性能。 模拟器采用Monte Carlo技术,根据生成的链路预算变量池来评估GPS系统性能。

    Method for fabricating antenna structures having adjustable radiation characteristics
    5.
    发明授权
    Method for fabricating antenna structures having adjustable radiation characteristics 失效
    制造具有可调辐射特性的天线结构的方法

    公开(公告)号:US07429961B2

    公开(公告)日:2008-09-30

    申请号:US11326881

    申请日:2006-01-06

    CPC classification number: H01Q9/30 H01Q15/0013

    Abstract: The radiation properties and wave guiding properties of frequency selective surfaces are used in conjunction with closely spaced antenna elements to fabricate antenna structures having adjustable radiation characteristics. The direction, magnitude, and polarization of radiation patterns for such antenna structures can be adjusted by varying the texture or patterning of layers of conducting material forming the frequency selective surfaces. The invention enables the fabrication of low profile antenna structures that can easily be conformed or integrated into complex surfaces without sacrificing antenna performance.

    Abstract translation: 频率选择表面的辐射性质和波导特性与紧密间隔的天线元件结合使用,以制造具有可调辐射特性的天线结构。 可以通过改变形成频率选择表面的导电材料的层的纹理或图案来调节这种天线结构的辐射图案的方向,幅度和极化。 本发明能够制造可以容易地符合或集成到复杂表面中的低轮廓天线结构,而不牺牲天线性能。

    Channel-adaptive radio modem
    6.
    发明授权
    Channel-adaptive radio modem 失效
    频道自适应无线电调制解调器

    公开(公告)号:US06483814B1

    公开(公告)日:2002-11-19

    申请号:US09383105

    申请日:1999-08-25

    CPC classification number: H04L1/0003 H04B7/26 H04J1/12

    Abstract: The present invention provides an apparatus for and method of determining the nature of the wireless environment which is in use and dynamically selecting appropriate frequency channels for data transmissions which are more likely to accommodate sustained data transmission at high speeds.

    Abstract translation: 本发明提供了一种用于确定正在使用的无线环境的性质的装置和方法,并动态地选择适用于数据传输的频道,这些频率信道更有可能适应高速度的持续数据传输。

    Ultra-high speed light activated microwave switch/modulation using
photoreactive effect
    7.
    发明授权
    Ultra-high speed light activated microwave switch/modulation using photoreactive effect 失效
    超高速光激活微波开关/调制采用光反应效应

    公开(公告)号:US5055810A

    公开(公告)日:1991-10-08

    申请号:US576140

    申请日:1990-08-29

    CPC classification number: H01L31/108 H01P1/15 H04B2210/006

    Abstract: The RF/microwave switch/modulator uses an optically controlled diode 20. The reactance of the diode may be varied by varying the illumination intensity. In this fashion, the photodiode in conjunction with an external circuit can switch or modulate a microwave signal by varying the reactance of the diode using a laser light source or the like. The bias voltage may be varied to electronically tune the diode so that the microwave frequency of operation can be electronically controlled.

    Abstract translation: RF /微波开关/调制器使用光控二极管20.可以通过改变照明强度来改变二极管的电抗。 以这种方式,与外部电路结合的光电二极管可以通过使用激光光源等改变二极管的电抗来切换或调制微波信号。 可以改变偏置电压以电子调谐二极管,使得微波操作频率可以被电子控制。

    Long range bidirectional optical fiber communication link
    8.
    发明授权
    Long range bidirectional optical fiber communication link 失效
    长距离双向光纤通信链路

    公开(公告)号:US5005936A

    公开(公告)日:1991-04-09

    申请号:US527228

    申请日:1990-05-22

    Applicant: Hui-Pin Hsu

    Inventor: Hui-Pin Hsu

    CPC classification number: H04B10/2503

    Abstract: A long-range optical fiber communication link overcoming certain constraints on signal transmission range imposed by fiber-induced loss is disclosed herein. A first embodiment of the communication link (10) of the present invention includes an optical fiber (16) having a first and a second end wherein the attenuation of optical energy passing therethrough at wavelengths included within a transmission window is substantially minimized. The inventive link (10) further includes a first arrangement (22) and (36) for launching a first optical carrier of a first wavelength onto the first end of the fiber (16). Provision is made within the launching arrangement (22) and (36) for impressing a first modulating signal spanning a first frequency spectrum upon the first carrier. The first embodiment also includes a second arrangement (26) and (37) for launching a second optical carrier of a second wavelength onto the second end of the fiber, wherein the second wavelength is included within the transmission window. The second launching arrangement (26) and (37) is further disposed to impress upon the second carrier a second modulating signal spanning a second frequency spectrum segregated from the first spectrum. A first receiver (64) of a first bandwidth encompassing the first frequency spectrum is coupled to the second end of the fiber (16). The first receiver (64) is operative to extract the first modulating signal from the first optical carrier. A second receiver (58) having a second bandwidth encompassing the second frequency spectrum is coupled to the first end of the fiber (16).

    Abstract translation: 本文公开了克服由光纤损耗施加的信号传输范围的某些限制的远距离光纤通信链路。 本发明的通信链路(10)的第一实施例包括具有第一和第二端的光纤(16),其中在包括在传输窗口内的波长处通过其中的光能的衰减基本上被最小化。 本发明的链路(10)还包括用于将第一波长的第一光学载体发射到光纤(16)的第一端上的第一布置(22)和(36)。 在发射装置(22)和(36)内进行用于在第一载波上施加跨越第一频谱的第一调制信号。 第一实施例还包括用于将第二波长的第二光学载体发射到光纤的第二端的第二布置(26)和(37),其中第二波长包括在透射窗内。 第二发射装置(26)和(37)还被布置成在第二载波上印刷跨越从第一光谱分离的第二频谱的第二调制信号。 包含第一频谱的第一带宽的第一接收器(64)耦合到光纤(16)的第二端。 第一接收器(64)可操作以从第一光学载体提取第一调制信号。 具有包含第二频谱的第二带宽的第二接收器(58)耦合到光纤(16)的第一端。

    Low cost short range radar
    9.
    发明授权
    Low cost short range radar 有权
    低成本短程雷达

    公开(公告)号:US07864099B2

    公开(公告)日:2011-01-04

    申请号:US12176787

    申请日:2008-07-21

    CPC classification number: H01Q25/02

    Abstract: A low cost radar system that employs monopulse beamforming to detect objects in the road-way both in elevation and azimuth. In one non-limiting embodiment, a beamforming receiver architecture includes a first beamforming device and a plurality of antennas coupled to the first beamforming device, and a second beamforming device and a plurality of antennas coupled to the second beamforming device. The first and second beamforming devices are oriented 90° relative to each other so that the receive beams provided by the first beamforming device detect objects in azimuth and the receive beams provided by the second beamforming device detect objects in elevation. A first switch is provided to selectively couple the sum pattern signal from the first and second beamforming devices to one output line, and a second switch is provided to selectively couple the difference pattern signals from the first and second beamforming devices to another output line.

    Abstract translation: 一种低成本的雷达系统,采用单脉冲波束形成来检测高程和方位角路面物体。 在一个非限制性实施例中,波束形成接收机架构包括第一波束成形设备和耦合到第一波束成形设备的多个天线以及耦合到第二波束成形设备的第二波束成形设备和多个天线。 第一和第二波束形成装置相对于彼此定向成90°,使得由第一波束形成装置提供的接收波束检测方位角中的物体,并且由第二波束形成装置提供的接收波束检测高程中的物体。 提供第一开关以选择性地将来自第一和第二波束形成装置的和图案信号耦合到一个输出线,并且提供第二开关以选择性地将来自第一和第二波束成形装置的差分图案信号耦合到另一个输出线。

    Metal contact RF MEMS single pole double throw latching switch
    10.
    发明授权
    Metal contact RF MEMS single pole double throw latching switch 失效
    金属接触RF MEMS单刀双掷闭锁开关

    公开(公告)号:US07280015B1

    公开(公告)日:2007-10-09

    申请号:US11006426

    申请日:2004-12-06

    CPC classification number: H01H59/0009 H01H2001/0047 H01H2059/0054

    Abstract: Apparatus for a micro-electro-mechanical switch that provides single pole, double throw switching action. The switch has two input lines and two output lines. The switch has a seesaw cantilever arm with contacts at each end that electrically connect the input lines with the output lines. The cantilever arm is latched into position by frictional forces between structures on the cantilever arm and structures on the substrate in which the cantilever arm is disposed. The state of the switch is changed by applying an electrostatic force at one end of the cantilever arm to overcome the mechanical force holding the other end of the cantilever arm in place.

    Abstract translation: 用于微机电开关的装置,其提供单极双掷切换动作。 开关有两条输入线和两条输出线。 开关具有跷跷板悬臂,每端具有触点,将输入线与输出线电连接。 悬臂由于悬臂上的结构与设置有悬臂的基板上的结构之间的摩擦力而被锁定到位。 通过在悬臂的一端施加静电力来克服将悬臂的另一端保持就位的机械力来改变开关的状态。

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