Adaptive impedance matching apparatus, system and method with improved dynamic range
First Claim
1. A mobile communication device, comprising:
- an antenna;
a matching network having an output coupled with the antenna, wherein the matching network comprises one or more variable reactive elements;
a memory to store computer instructions; and
a controller coupled with the memory and the matching network, wherein the controller, responsive to executing the computer instructions, performs operations comprising;
obtaining a voltage at the output of the matching network, wherein the voltage is obtained using a voltage detector;
determining whether to adjust the matching network according to the voltage that is obtained; and
responsive to a determination to adjust the matching network, adapting the matching network to increase the voltage at the output of the matching network that is coupled to the antenna, wherein the adapting mitigates undesired matching impedances in the matching network by varying the one or more variable reactive elements.
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Accused Products
Abstract
An embodiment of the present invention provides an apparatus, comprising'"'"' an RF matching network connected to at least one RF input port and at least one RF output port and 5 including one or more voltage or current controlled variable reactive elements; a voltage detector connected to the at least one RF output port via a variable voltage divider to determine the voltage at the at least one RF output port and provide voltage information to a controller that controls a bias driving circuit which provides voltage or current bias to the RF matching network; a variable voltage divider connected to the voltage detector and implemented using a 10 multi-pole RF switch to select one of a plurality of different resistance ratios to improve the dynamic range of the apparatus; and wherein the RF matching network is adapted to maximize RF power transferred from the at least one RF input port to the at least one RF output port by varying the voltage or current to the voltage or current controlled variable reactive elements to maximize the RF voltage at the at least one RF output port.
554 Citations
20 Claims
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1. A mobile communication device, comprising:
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an antenna; a matching network having an output coupled with the antenna, wherein the matching network comprises one or more variable reactive elements; a memory to store computer instructions; and a controller coupled with the memory and the matching network, wherein the controller, responsive to executing the computer instructions, performs operations comprising; obtaining a voltage at the output of the matching network, wherein the voltage is obtained using a voltage detector; determining whether to adjust the matching network according to the voltage that is obtained; and responsive to a determination to adjust the matching network, adapting the matching network to increase the voltage at the output of the matching network that is coupled to the antenna, wherein the adapting mitigates undesired matching impedances in the matching network by varying the one or more variable reactive elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A non-transitory computer-readable storage device including computer instructions which, when executed by a processor of a mobile communication device, cause the processor to perform operations comprising:
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obtaining a voltage at an output of a matching network of the mobile communication device, wherein the voltage is obtained using a voltage detector, and wherein the output of the matching network is coupled to an antenna of the mobile communication device; determining whether to adjust the matching network according to the voltage that is obtained; and responsive to a determination to adjust the matching network, adapting the matching network to increase the voltage at the output of the matching network that is coupled to the antenna, wherein the adapting mitigates undesired matching impedances in the matching network by varying one or more variable reactive elements of the matching network. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method, comprising:
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obtaining, by a processing system including a processor, a voltage at an output of a matching network that is coupled to an antenna, wherein the voltage is obtained using a voltage detector; determining whether to adjust the matching network according to the voltage that is obtained; and responsive to a determination to adjust the matching network, adapting, by the processing system, the matching network to increase the voltage at the output of the matching network that is coupled to the antenna, wherein the adapting mitigates undesired matching impedances in the matching network by varying one or more variable reactive elements of the matching network. - View Dependent Claims (18, 19, 20)
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Specification