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    • 2. 发明申请
    • Transmit antenna multiplexing for vehicular passive entry systems
    • 用于车辆被动进入系统的发射天线复用
    • US20060279467A1
    • 2006-12-14
    • US11127560
    • 2005-05-12
    • Thomas LeMenseRiad GhabraQingfeng Tang
    • Thomas LeMenseRiad GhabraQingfeng Tang
    • H01Q1/32
    • H01Q1/3241H01Q1/3266H01Q1/3291H01Q21/28
    • An antenna coupler for a wireless communication system in a vehicle couples a transmit signal source to a plurality of antennas arranged within the vehicle. A first saturable reactor has a first load winding and a first control winding wound on a first saturable core, the first load winding coupling the signal source to a first antenna. A first current source is coupled to the first control winding for providing a selected current to the first control winding. A second saturable reactor has a second load winding and a second control winding wound on a second saturable core, the second load winding coupling the signal source to a second antenna. A second current source is coupled to the second control winding for providing a selected current to the second control winding. A controller is coupled to the first and second current sources for commanding the first and second selected currents to selectably attenuate or non-attenuate a transmit signal from the transmit signal source to each respective antenna.
    • 用于车辆中的无线通信系统的天线耦合器将发送信号源耦合到布置在车辆内的多个天线。 第一饱和电抗器具有卷绕在第一可饱和磁芯上的第一负载绕组和第一控制绕组,第一负载绕组将信号源耦合到第一天线。 第一电流源耦合到第一控制绕组,用于向第一控制绕组提供所选择的电流。 第二饱和电抗器具有缠绕在第二饱和磁芯上的第二负载绕组和第二控制绕组,所述第二负载线圈将信号源耦合到第二天线。 第二电流源耦合到第二控制绕组,用于向第二控制绕组提供所选择的电流。 控制器耦合到第一和第二电流源,用于命令第一和第二选定电流可选地衰减或非衰减从发射信号源到每个相应天线的发射信号。
    • 7. 发明授权
    • Remote keyless entry system with two-way long range communication
    • 遥控无钥匙进入系统,双向远程通讯
    • US08026793B2
    • 2011-09-27
    • US10960657
    • 2004-10-07
    • Yi LuoRiad GhabraQingfeng Tang
    • Yi LuoRiad GhabraQingfeng Tang
    • H04Q1/00
    • B60R25/24G07C9/00309G07C2009/00793G07C2209/62H04B1/04
    • Vehicle information (e.g., status information, calibratable parameters, or diagnostic data) is transmitted from a base station mounted in a vehicle to a portable RKE fob via a radio-frequency signal within a specified average field strength limit. A multi-byte vehicle message is formed and then coded into a multi-bit coded message. The multi-bit coded message is framed into a plurality of packets. The radio-frequency signal is wirelessly transmitted from the base station with a plurality of spaced packet windows having a predetermined duty cycle, each packet window including a respective one of the plurality of packets. The radio-frequency signal within each of the packet windows has a predetermined field strength greater than the average field strength limit and a substantially zero field strength between the packet windows. The predetermined duty cycle results in an actual average field strength for transmitting all of the packets not exceeding the average field strength limit.
    • 车辆信息(例如,状态信息,可校准参数或诊断数据)经由指定平均场强限度内的射频信号从安装在车辆中的基站发送到便携式RKE FOB。 形成多字节车辆消息,然后编码成多位编码消息。 多比特编码消息被构成多个分组。 射频信号是从具有预定占空比的多个间隔分组窗口从基站无线发送的,每个分组窗口包括多个分组中的相应一个分组。 每个分组窗口内的射频信号具有大于平均场强限度的预定场强和分组窗口之间基本为零的场强。 预定的占空比导致实际的平均场强,用于传送不超过平均场强极限的所有分组。