Adaptively tunable antennas and method of operation therefore
First Claim
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1. An apparatus, comprising:
- a tunable antenna including a variable reactance network connected to said antenna; and
a closed loop control system adapted to sense the RF voltage across said variable reactance network and adjust the reactance of said network to maximize the RF voltage.
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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.
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Citations
24 Claims
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1. An apparatus, comprising:
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a tunable antenna including a variable reactance network connected to said antenna; and
a closed loop control system adapted to sense the RF voltage across said variable reactance network and adjust the reactance of said network to maximize the RF voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method, comprising:
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improving the efficiency of an antenna system by sensing the RF voltage present on a variable reactance network within said antenna system;
controlling the bias signal presented to said variable reactance network; and
maximizing the RF voltage present on the variable reactance network. - View Dependent Claims (12, 13, 14)
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15. An adaptively tuned antenna, comprising
a variable reactance network connected to said antenna; -
an RF detector to sense the voltage on the antenna;
a controller that monitors said RF voltage and supplies control signals to a driver circuit; and
wherein said driver circuit converts said control signals to bias signals for said variable reactance network. - View Dependent Claims (16, 17, 18)
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19. A machine-accessible medium that provides instructions, which when accessed, cause a machine to perform operations comprising:
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improving the efficiency of an antenna system by sensing the RF voltage present on a variable reactance network within said antenna system;
controlling the bias signal presented to said variable reactance network; and
maximizing the RF voltage present on the variable reactance network. - View Dependent Claims (20, 21, 22)
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23. A method, comprising:
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improving the radiated harmonic distortion of a transmitting antenna system by sensing the RF voltage present on a variable reactance network within said antenna system;
controlling the bias signal presented to said variable reactance network; and
maximizing the RF voltage present on the variable reactance network.
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24. A method, comprising:
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improving the DC power consumption of a transceiver system by sensing the RF voltage present on a variable reactance network within the transceiver'"'"'s antenna system;
controlling the bias signal presented to said variable reactance network; and
maximizing the RF voltage present on the variable reactance network.
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Specification