Adaptively tunable antennas incorporating an external probe to monitor radiated power
First Claim
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1. A method comprising:
- obtaining an RF voltage present on an RF field probe that is located in proximity to an antenna of a communication device, wherein the RF voltage is generated based on radiated power of the antenna, and wherein the RF voltage is sensed by an RF detector of the communication device;
utilizing a processor for generating control signals based on the obtained RF voltage; and
providing the control signals to a driver circuit for conversion into bias voltages that are used by a variable reactance network of the communication device for tuning the antenna via applying the bias voltages to at least one variable capacitor of the variable reactance network to adjust a capacitance of the at least one variable capacitor.
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Abstract
An embodiment of the present invention an apparatus, comprising an apparatus, comprising an adaptively-tuned antenna including a variable reactance network connected to the antenna, an RF field probe located near the antenna, an RF detector to sense voltage from the field probe, a controller that monitors the RF voltage and supplies control signals to a driver circuit and wherein the driver circuit converts the control signals to bias signals for the variable reactance network.
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Citations
20 Claims
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1. A method comprising:
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obtaining an RF voltage present on an RF field probe that is located in proximity to an antenna of a communication device, wherein the RF voltage is generated based on radiated power of the antenna, and wherein the RF voltage is sensed by an RF detector of the communication device; utilizing a processor for generating control signals based on the obtained RF voltage; and providing the control signals to a driver circuit for conversion into bias voltages that are used by a variable reactance network of the communication device for tuning the antenna via applying the bias voltages to at least one variable capacitor of the variable reactance network to adjust a capacitance of the at least one variable capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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obtaining an RF voltage present on an RF field probe that is located in proximity to an antenna of a communication device, wherein the RF voltage is generated based on radiated power of the antenna, and wherein the RF voltage is sensed by art RF detector of the communication device; generating, by a processor, control signals in an iterative process based on the obtained RF voltage; and providing the control signals to a driver circuit for conversion into bias voltages that are used by a variable reactance network of the communication device for tuning the antenna via applying the bias voltages to at least one variable capacitor of the variable reactance network to adjust a capacitance of the at least one variable capacitor. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method comprising:
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obtaining an RF voltage present on an RF field probe that is located in proximity to an antenna of a communication device, wherein the RF voltage is generated based on radiated power of the antenna, and wherein the RF voltage is sensed by an RF detector of the communication device; generating, by a processor, control signals based on the obtained RF voltage; and providing the control signals to a driver circuit for conversion into bias voltages that are used by a variable reactance network of the communication device for tuning the antenna via applying the bias voltages to at least one variable capacitor of the variable reactance network to adjust a capacitance of the at least one variable capacitor wherein the capacitance of the at least one variable capacitor is adjusted differently for transmit and receive modes of the communication device. - View Dependent Claims (17, 18, 19, 20)
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Specification