Antenna tuning on an impedance trajectory
First Claim
1. A communications device comprising:
- at least one radio transceiver;
at least one antenna that has an input impedance which varies in response to changes in operating conditions of the communications device;
an antenna tuner coupled between the at least one radio transceiver and the at least one antenna;
a persistent memory which stores a plurality of pre-established trajectories of antenna tuning states and a corresponding plurality of pre-identified device operating conditions and communications modes; and
an antenna tuner controller connected within a feedback configuration that provides the antenna tuner controller with detected signal levels and determines a current operating condition of the communications device, wherein at least one of said detected signal levels is utilized by the antenna tuner controller to generate antenna tuning states that the antenna tuner controller forwards to the antenna tuner to adjust the at least one detected signal level towards a given value, wherein the generated antenna tuning states represent a sequence of points along a selected, pre-established trajectory of tuning states that corresponds to a particular pre-identified operating condition that best matches the current operating condition.
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Accused Products
Abstract
A method, transceiver integrated circuit (IC), and communications device for generating antenna tuning states derived from a pre-established trajectory of tuning states to adjust a detected signal level towards a preset, given value. A tuning state generation (TSG) controller determines whether a detected signal level matches a given value. If the detected signal level does not match the given value, the TSG controller selects an initial preset tuning state from a pre-established trajectory corresponding to a pre-identified operating condition that best matches a current operating condition. The TSG logic forwards the initial preset tuning state to the antenna tuner to trigger impedance transformation. Following generation of the initial preset tuning state, the controller receives an updated detected signal level. If the updated detected signal level fails to match the given value, the controller generates an incremental tuning state that is interpolated between the initial and a final preset tuning states.
274 Citations
18 Claims
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1. A communications device comprising:
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at least one radio transceiver; at least one antenna that has an input impedance which varies in response to changes in operating conditions of the communications device; an antenna tuner coupled between the at least one radio transceiver and the at least one antenna; a persistent memory which stores a plurality of pre-established trajectories of antenna tuning states and a corresponding plurality of pre-identified device operating conditions and communications modes; and an antenna tuner controller connected within a feedback configuration that provides the antenna tuner controller with detected signal levels and determines a current operating condition of the communications device, wherein at least one of said detected signal levels is utilized by the antenna tuner controller to generate antenna tuning states that the antenna tuner controller forwards to the antenna tuner to adjust the at least one detected signal level towards a given value, wherein the generated antenna tuning states represent a sequence of points along a selected, pre-established trajectory of tuning states that corresponds to a particular pre-identified operating condition that best matches the current operating condition. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A transceiver integrated circuit comprising:
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at least one radio transceiver; an antenna tuner coupled between the at least one radio transceiver and at least one antenna, wherein the at least one antenna has an input impedance which varies in response to changes in operating conditions of communications device; a persistent memory which stores a plurality of pre-established trajectories of antenna tuning states and a corresponding plurality of pre-identified device operating conditions and communications modes; and an antenna tuner controller connected within a feedback configuration that provides the antenna tuner controller with detected signal levels and determines a current operating condition of the communications device, wherein at least one of said detected signal levels is utilized by the antenna tuner controller to generate antenna tuning states that the antenna tuner controller forwards to the antenna tuner to adjust the at least one detected signal level towards a given value, wherein the generated antenna tuning states represent a sequence of points along a selected, pre-established trajectory of tuning states that corresponds to a particular pre-identified operating condition that best matches the current operating condition. - View Dependent Claims (8, 9, 10, 11, 12)
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13. In a transceiver integrated circuit, a method comprising:
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determining at least one detected signal level which indicates a level of power being delivered to at least one antenna; determining a current operating condition of communications device; storing a plurality of pre-established trajectories of tuning states and a corresponding plurality of pre-identified device operating conditions and communications modes; and an antenna tuner controller generating, based on the at least one detected signal level, antenna tuning states to adjust the level of power corresponding to the at least one detected signal level towards a preset, given value, wherein the generated antenna tuning states represent a sequence of points along a selected, pre-established trajectory of tuning states that corresponds to a particular pre-identified operating condition that best matches the current operating condition; further wherein the pre-established trajectory of tuning states comprises (a) an initial preset tuning state and a final preset tuning state and (b) a plurality of other tuning states that are interpolated between the initial and the final preset tuning states. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification