Adaptively tunable antennas and method of operation therefore
First Claim
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1. A non-transitory machine-accessible medium that provides instructions, which when accessed, cause a machine to perform operations comprising:
- increasing an efficiency of an antenna system by sensing a radio frequency (RF) voltage present on a variable reactance network embedded in an antenna of said antenna system;
controlling a bias signal presented to said variable reactance network based on the sensing of the RF voltage; and
increasing the RF voltage present on the variable reactance network using an algorithm implemented on a digital processor, wherein the algorithm is an iterative process repeating the sensing of the RF voltage and the controlling of the bias signal based on the sensing of the RF voltage,wherein the digital processor operates in a mobile phone, wherein the digital processor initially obtains a default bias signal from a look-up table stored in a memory of the mobile phone, and wherein the default bias signal is adjusted based on the iterative process.
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Abstract
An embodiment of the present invention is an apparatus, comprising a tunable antenna including a variable reactance network connected to the antenna a closed loop control system adapted to sense the RF voltage across the variable reactance network and adjust the reactance of the network to maximize the RF voltage. The variable reactance network may comprise a parallel capacitance or a series capacitance. Further, the variable reactance networks may be connected to the antenna, which may be a patch antenna, a monopole antenna, or a slot antenna.
296 Citations
17 Claims
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1. A non-transitory machine-accessible medium that provides instructions, which when accessed, cause a machine to perform operations comprising:
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increasing an efficiency of an antenna system by sensing a radio frequency (RF) voltage present on a variable reactance network embedded in an antenna of said antenna system; controlling a bias signal presented to said variable reactance network based on the sensing of the RF voltage; and increasing the RF voltage present on the variable reactance network using an algorithm implemented on a digital processor, wherein the algorithm is an iterative process repeating the sensing of the RF voltage and the controlling of the bias signal based on the sensing of the RF voltage, wherein the digital processor operates in a mobile phone, wherein the digital processor initially obtains a default bias signal from a look-up table stored in a memory of the mobile phone, and wherein the default bias signal is adjusted based on the iterative process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method, comprising:
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reducing a radiated harmonic distortion of a transmitting antenna system by sensing a radio frequency (RF) voltage present on a variable reactance network within said antenna system; controlling a bias signal presented to said variable reactance network based on the sensing of the RF voltage; and adjusting the RF voltage present on the variable reactance network using an algorithm implemented on a digital processor, wherein the algorithm is an iterative process repeating the sensing of the RF voltage and the controlling of the bias signal based on the sensing of the RF voltage, wherein the variable reactance network comprises at least one of one or more variable capacitors or one or more variable inductors, wherein the digital processor operates in a mobile phone, wherein the digital processor initially obtains a default bias signal from a look-up table stored in a memory of the mobile phone, and wherein the default bias signal is adjusted based on the iterative process. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method, comprising:
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reducing a direct current (DC) power consumption of a transceiver system by sensing a radio frequency (RF) voltage present on a variable reactance network within the transceiver'"'"'s antenna system; controlling a bias signal presented to said variable reactance network based on the sensing of the RF voltage; and adjusting the RF voltage present on the variable reactance network using an algorithm implemented on a digital processor, wherein the algorithm is an iterative process repeating the sensing of the RF voltage and the controlling of the bias signal based on the sensing of the RF voltage, wherein the variable reactance network comprises at least one of one or more variable capacitors or one or more variable inductors, wherein the digital processor operates in a mobile phone, wherein the digital processor initially obtains a default bias signal from a look-up table stored in a memory of the mobile phone, and wherein the default bias signal is adjusted based on the iterative process. - View Dependent Claims (16, 17)
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Specification