Wireless near field communication device and power transmitter and a method for wirelessly transmitting operating power to another device
First Claim
1. A combined near field communication and wireless power transmitter device, comprising:
- a first antenna connected to an antenna tuning network and capable of coupling wirelessly to one or more second antennae in the near field of the first antenna with coupling characteristics,means for communicating wirelessly using said first antenna with a near field communication device in a near field communication mode, andmeans for transmitting wirelessly power using said first antenna to another electronic device in the vicinity of the first antenna in a power transmission mode,wherein, said power transmission mode, the antenna tuning network is configured to change its input impedance if there is a change in said coupling characteristics.
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Abstract
The invention relates to a combined near field communication and wireless power transmitter device comprising a first antenna coupled to antenna tuning network and capable of coupling to one or more second antennae in the near field of the first antenna with coupling characteristics, means for communicating wirelessly using said first antenna with a near field communication device in a near field communication mode, and means for transmitting wirelessly power using said first antenna to another device in the vicinity of the first antenna in a power transmission mode. In power transmission mode, the antenna tuning network operates in resonance and has an initial input impedance which is configured to change if there is a change in the coupling characteristics during power transmission, for example charging. The invention also relates to a method of transmitting power to a mobile device for example for charging purposes.
15 Citations
21 Claims
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1. A combined near field communication and wireless power transmitter device, comprising:
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a first antenna connected to an antenna tuning network and capable of coupling wirelessly to one or more second antennae in the near field of the first antenna with coupling characteristics, means for communicating wirelessly using said first antenna with a near field communication device in a near field communication mode, and means for transmitting wirelessly power using said first antenna to another electronic device in the vicinity of the first antenna in a power transmission mode, wherein, said power transmission mode, the antenna tuning network is configured to change its input impedance if there is a change in said coupling characteristics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of transmitting power to an electronic device with a transmitter device capable of near field communication in an NFC communication mode and wireless power transmission in a power transmission mode through a single first antenna coupled to an antenna tuning network having an input impedance, said method comprising:
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using said transmitter device in an NFC communication mode, switching the transmitter device to a power transmission mode for transmitting power to the electronic device having a second antenna coupled with the first antenna with coupling characteristics and tuned into resonance with the first antenna, and varying the input impedance of the antenna tuning network of the transmitter device if the coupling characteristics of the first and second antenna change during said power transmission. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification