Invention Grant
US08934837B2 Mobile wireless communications device including NFC antenna matching control circuit and associated methods
有权
移动无线通信设备包括NFC天线匹配控制电路及相关方法
- Patent Title: Mobile wireless communications device including NFC antenna matching control circuit and associated methods
- Patent Title (中): 移动无线通信设备包括NFC天线匹配控制电路及相关方法
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Application No.: US13733487Application Date: 2013-01-03
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Publication No.: US08934837B2Publication Date: 2015-01-13
- Inventor: Lizhong Zhu , Libo Zhu , Robert Michael Philip Gondosch , Craig Stuart MacKenzie
- Applicant: Research In Motion Limited
- Applicant Address: CA Waterloo, Ontario
- Assignee: BlackBerry Limited
- Current Assignee: BlackBerry Limited
- Current Assignee Address: CA Waterloo, Ontario
- Agency: Allen, Dyer, Doppelt, Milbrath & Gilchrist, P.A.
- Main IPC: H04B5/00
- IPC: H04B5/00 ; H04B5/02
Abstract:
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.
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