Method and apparatus for adaptive impedance matching
First Claim
1. A communication device, comprising:
- a transceiver;
an antenna;
an RF matching network comprising a plurality of variable reactive elements, wherein the RF matching network has RF ports coupled to the transceiver and coupled to the antenna; and
a controller coupled with the RF matching network, wherein the controller determines a signal parameter associated with at least one of the RF ports of the RF matching network, wherein the controller generates a plurality of control signals for independently controlling the plurality of variable reactive elements based on the signal parameter,wherein the plurality of control signals is generated by the controller based on a mode of operation of the communication device, andwherein the RF matching network modifies signal power transferred between the RF ports according to the plurality of control signals applied to the plurality of variable reactive elements to vary a variable impedance of the RF matching network.
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Abstract
A system that incorporates teachings of the present disclosure may include, for example, an adaptive impedance matching network having an RF matching network coupled to at least one RF input port and at least one RF output port and comprising one or more controllable variable reactive elements. The RF matching network can be adapted to reduce a level of reflected power transferred from said at least one input port by varying signals applied to said controllable variable reactive elements. The one or more controllable variable reactive elements can be coupled to a circuit adapted to map one or more control signals that are output from a controller to a signal range that is compatible with said one or more controllable variable reactive elements. Additional embodiments are disclosed.
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Citations
20 Claims
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1. A communication device, comprising:
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a transceiver; an antenna; an RF matching network comprising a plurality of variable reactive elements, wherein the RF matching network has RF ports coupled to the transceiver and coupled to the antenna; and a controller coupled with the RF matching network, wherein the controller determines a signal parameter associated with at least one of the RF ports of the RF matching network, wherein the controller generates a plurality of control signals for independently controlling the plurality of variable reactive elements based on the signal parameter, wherein the plurality of control signals is generated by the controller based on a mode of operation of the communication device, and wherein the RF matching network modifies signal power transferred between the RF ports according to the plurality of control signals applied to the plurality of variable reactive elements to vary a variable impedance of the RF matching network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A communication device, comprising:
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a transceiver; an antenna; an RF matching network comprising a plurality of variable reactive elements, wherein the RF matching network has RF ports coupled to the transceiver and coupled to the antenna; and a controller coupled with the RF matching network that determines a voltage magnitude associated with at least one of the RF ports, wherein the controller generates a plurality of control signals for independently controlling the plurality of variable reactive elements based on the voltage magnitude and based on a mode of operation of the communication device, and wherein the RF matching network modifies signal power transferred between the RF ports according to the plurality of control signals applied to the plurality of variable reactive elements to vary a variable impedance of the RF matching network. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A communication device, comprising:
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a transceiver; an antenna; an RF matching network comprising a plurality of voltage tunable dielectric capacitors, wherein the RF matching network has RF ports coupled to the transceiver and coupled to the antenna; and a controller coupled with the RF matching network that determines a signal parameter associated with at least one of the RF ports, wherein the controller generates a plurality of control signals for independently controlling the plurality of voltage tunable dielectric capacitors based on the signal parameter and based on an operating frequency of the communication device, wherein the plurality of control signals is generated by the controller based on a mode of operation of the communication device, and wherein the RF matching network modifies signal power transferred between the RF ports according to the plurality of control signals applied to the plurality of voltage tunable dielectric capacitors to vary a variable impedance of the RF matching network. - View Dependent Claims (19, 20)
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Specification