公开(公告)号：US08934837B2

公开(公告)日：2015-01-13

申请号：US13733487

申请日：2013-01-03

申请人： Research In Motion Limited

发明人： Lizhong Zhu ,  Libo Zhu ,  Robert Michael Philip Gondosch ,  Craig Stuart MacKenzie

IPC分类号： H04B5/00 ,  H04B5/02

CPC分类号： H04B5/0012 ,  H04B5/0025 ,  H04B5/0031 ,  H04B5/0037 ,  H04B5/0081 ,  H04B5/0087 ,  H04B5/02

摘要： A mobile wireless communications device includes a near-field communications (NFC) transceiver, NFC antennas and an NFC control circuit. The NFC transceiver generates a received signal strength based on a received signal from an adjacent NFC device. The NFC control circuit includes an antenna switch circuit coupled between the NFC transceiver and the NFC antennas. A capacitance sensing circuit is coupled to the NFC antennas to determine capacitance values thereof. A processor operates the antenna switch circuit based upon the received signal strength and the capacitance values.

摘要翻译： 移动无线通信设备包括近场通信（NFC）收发器，NFC天线和NFC控制电路。 NFC收发器基于来自相邻NFC设备的接收信号产生接收信号强度。 NFC控制电路包括耦合在NFC收发器和NFC天线之间的天线开关电路。 电容感测电路耦合到NFC天线以确定其电容值。 处理器基于接收到的信号强度和电容值来操作天线开关电路。