MULTI-MODE COMMUNICATION SYSTEM FOR A MOBILE PHONE
First Claim
1. A multi-mode communication system for a mobile phone, comprising:
- a plurality of antennas;
a plurality of matching networks, each matching network connected to a respective one of said plurality of antennas;
a plurality of near field devices, each near field device connected to a respective one of said plurality of matching networks, each pair of near field device and its associated matching network operative to either load modulate its antenna or generate an active magnetic field via its antenna;
a plurality of switches, with one of said switches positioned between each of said matching networks and its respective antenna, anda controller for controlling the switched state of said plurality of switches such that one or more of said near field devices and their respective matching networks are selectively coupled to their respective antennas.
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Abstract
A multi-mode communication system for a mobile phone includes a plurality of antennas, a plurality of matching networks, each matching network connected to a respective one of said plurality of antennas, a plurality of near field devices, each near field device connected to a respective one of said plurality of matching networks, each pair of near field device and its associated matching network operative to either load modulate its antenna or generate an active magnetic field via its antenna, a plurality of switches, with one of said switches positioned between each of said matching networks and its respective antenna, and a controller for controlling the switched state of said plurality of switches such that one or more of said near field devices and their respective matching networks are selectively coupled to their respective antennas.
114 Citations
15 Claims
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1. A multi-mode communication system for a mobile phone, comprising:
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a plurality of antennas; a plurality of matching networks, each matching network connected to a respective one of said plurality of antennas; a plurality of near field devices, each near field device connected to a respective one of said plurality of matching networks, each pair of near field device and its associated matching network operative to either load modulate its antenna or generate an active magnetic field via its antenna; a plurality of switches, with one of said switches positioned between each of said matching networks and its respective antenna, and a controller for controlling the switched state of said plurality of switches such that one or more of said near field devices and their respective matching networks are selectively coupled to their respective antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A multi-mode communication system for a mobile phone, comprising:
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first and second antennas; a matching network connected to said first antenna; a resonant capacitor connected to said second antenna; a first near field device connected to said matching network; a second near field device comprising a secure element connected to said resonant capacitor; a first switch connected between said matching network and said first antenna; a second switch connected between said resonant capacitor and said second antenna; and a controller for controlling the switched state of said first and second switches such that only one of said near field devices is selectively coupled to its respective antenna at any given time. - View Dependent Claims (13, 14)
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15. A method for operating a multi-mode mobile communication system to provide near field functionality for a mobile phone, wherein said system includes a plurality of near field devices coupled to respective matching networks that are each connected to a separate antenna through a switch, comprising:
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determining a mode of operation for said system; selectively controlling the state of each said switch so that said mode of operation is enabled; and detecting when to end said mode of operation.
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Specification