Tunable antenna system
First Claim
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1. A tunable antenna system comprising:
- an antenna structure, including an internal trace coupled to a first arm of a plurality of antenna arms, wherein the internal trace passes under a second arm of the plurality of antenna arms;
a dynamic capacitive loading device, having an achievable dynamic capacitive device tuning range, coupled to the internal trace of the antenna structure, wherein the dynamic capacitive loading device has a variable capacitive load that depends upon voltage from a voltage source provided on a voltage input of the dynamic capacitive loading device;
a performance quantification engine coupled to the dynamic capacitive loading device, wherein, in operation, the performance quantification engine performs first stage tuning one or more times using a first performance metric of a plurality of performance metrics then uses a second performance metric of the plurality of performance metrics to accomplish second stage tuning, wherein the first stage tuning has lower complexity than the second stage tuning;
wherein, in operation, voltage provided by the voltage source is adjusted from a first setting that is within the achievable dynamic capacitive device tuning range through a set of second settings that are within the achievable dynamic capacitive device tuning range to a third setting that is within the achievable dynamic capacitive device tuning range in accordance with the first or second performance metric to tune the antenna.
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Abstract
A technique for tuning an antenna may include one or more of the following: working against a ground plane, utilizing the third dimension by alternating layers on a substrate, integrating an inductive short stub in the substrate to improve port matching, and making a tuning port available for capacitive loading and resonance modification.
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Citations
18 Claims
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1. A tunable antenna system comprising:
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an antenna structure, including an internal trace coupled to a first arm of a plurality of antenna arms, wherein the internal trace passes under a second arm of the plurality of antenna arms; a dynamic capacitive loading device, having an achievable dynamic capacitive device tuning range, coupled to the internal trace of the antenna structure, wherein the dynamic capacitive loading device has a variable capacitive load that depends upon voltage from a voltage source provided on a voltage input of the dynamic capacitive loading device; a performance quantification engine coupled to the dynamic capacitive loading device, wherein, in operation, the performance quantification engine performs first stage tuning one or more times using a first performance metric of a plurality of performance metrics then uses a second performance metric of the plurality of performance metrics to accomplish second stage tuning, wherein the first stage tuning has lower complexity than the second stage tuning; wherein, in operation, voltage provided by the voltage source is adjusted from a first setting that is within the achievable dynamic capacitive device tuning range through a set of second settings that are within the achievable dynamic capacitive device tuning range to a third setting that is within the achievable dynamic capacitive device tuning range in accordance with the first or second performance metric to tune the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method comprising:
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performing a first tuning stage, including; setting a tuning voltage to an initial value, wherein tuning voltage impacts antenna performance; quantifying performance metric data associated with one or more signals, wherein performance metric data is associated with the antenna performance and the one or more signals; estimating, using the performance metric data, a tuning voltage that would improve the antenna performance; varying tuning voltage in accordance with the estimated tuning voltage to improve the antenna performance; performing a second tuning stage, including; quantifying second performance metric data associated with one or more different performance metrics; estimating, using the performance metric data, a second tuning voltage that would improve the antenna performance; varying tuning voltage in accordance with the estimated second tuning voltage to improve the antenna performance. - View Dependent Claims (14, 15)
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16. A system comprising:
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a radio receiver; a performance quantification engine coupled to the radio receiver; a tuning voltage calculator coupled to the performance quantification engine; wherein, in operation; the radio receiver receives a signal from an antenna;
the radio receiver sends performance metric data from the signal to the performance quantification engine;the performance quantification engine provides a performance control signal derived from the performance metric data to the tuning voltage calculator during a first stage tuning; the tuning voltage calculator estimates a tuning voltage that, when provided to a dynamic capacitive loading device coupled to the antenna, would improve performance of the antenna during the first stage tuning; the performance quantification engine provides a second performance control signal derived from the performance metric data to the tuning voltage calculator during a second stage tuning; the tuning voltage calculator estimates a second tuning voltage that, when provided to the dynamic capacitive loading device coupled to the antenna, would improve performance of the antenna during the second stage tuning. - View Dependent Claims (17, 18)
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Specification