Method and apparatus for adaptive impedance matching
First Claim
1. An apparatus, comprising:
- an RF matching network comprising one or more variable reactive elements, wherein the RF matching network has an RF input port coupled to a transmitter producing an RF signal supplied to the RF input port, and wherein the RF matching network comprises an RF output port coupled to an antenna; and
an RF voltage detector that receives a signal from the RF output port of the RF matching network, wherein the RF voltage detector detects an RF voltage magnitude representative of the signal produced by the RF output port of the RF matching network,wherein said RF matching network modifies signal power transferred the RF input port to the RF output port according to one or more bias signals applied to the one or more variable reactive elements to vary a variable impedance of the RF matching network,wherein the one or more variable reactive elements are coupled to a circuit that maps one or more control signals to the one or more bias signals, and wherein the one or more control signals are generated by a controller according to a mode of operation of a communication device and the RF voltage magnitude.
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Abstract
A system that incorporates teachings of the present disclosure may include, for example, an apparatus having an RF matching network including one or more variable reactive elements, where the RF matching network has a first port coupled to a transceiver and second port coupled to an antenna. The RF matching network can modify signal power transferred between the first port and the second port according to one or more bias signals applied to the one or more variable reactive elements to vary a variable impedance of the RF matching network. The one or more variable reactive elements are coupled to a circuit that maps one or more control signals to the one or more bias signals, and wherein the one or more control signals are generated by a controller according to a mode of operation of a communication device. Additional embodiments are disclosed.
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Citations
20 Claims
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1. An apparatus, comprising:
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an RF matching network comprising one or more variable reactive elements, wherein the RF matching network has an RF input port coupled to a transmitter producing an RF signal supplied to the RF input port, and wherein the RF matching network comprises an RF output port coupled to an antenna; and an RF voltage detector that receives a signal from the RF output port of the RF matching network, wherein the RF voltage detector detects an RF voltage magnitude representative of the signal produced by the RF output port of the RF matching network, wherein said RF matching network modifies signal power transferred the RF input port to the RF output port according to one or more bias signals applied to the one or more variable reactive elements to vary a variable impedance of the RF matching network, wherein the one or more variable reactive elements are coupled to a circuit that maps one or more control signals to the one or more bias signals, and wherein the one or more control signals are generated by a controller according to a mode of operation of a communication device and the RF voltage magnitude. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A matching network, comprising:
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a variable reactive element coupled to an RF input port and an RF output port, wherein the RF input port is coupled to a transmitter producing an RF signal supplied to the RF input port and the RF output port is coupled to an antenna of a device; and an RF voltage detector coupled to the RF output port for detecting an RF voltage magnitude associated with a signal produced by the RF output port of the RF matching network, wherein the variable reactive element is adapted to change power transferred between the RF input port and the RF output port responsive to a control signal generated by a controller that is mapped by a circuit to adjust a reactance of the variable reactive element according to a mode of operation of the device and the RF voltage magnitude. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A non-transitory machine-readable storage medium, comprising computer instructions, wherein responsive to a processor executing the computer instructions, the processor performs operations comprising:
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determining a mode of operation of a device; receiving RF voltage magnitude data an RF detector, wherein a transmitter produces an RF signal supplied to an RF input port of a matching network, wherein the matching network comprises an RF output port coupled to an antenna, and wherein the RF detector detects the RF voltage magnitude data at the RF output port of the matching network; generating according to the mode of operation and the RF voltage magnitude data a control signal that is mapped by a circuit to a bias signal; and outputting the bias signal to the matching network to modify a reactance therein that causes a change in power transferred from the RF input port to the RF output port of the matching network. - View Dependent Claims (19, 20)
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Specification