System and method for tuning an antenna in a wireless communication device
First Claim
Patent Images
1. A wireless communication element, comprising:
- a receive path configured to receive a first wireless communication signal and convert the first wireless communication signal into a first digital signal based at least on an oscillator signal;
a transmit path configured to convert a second digital signal into a second wireless communication signal based at least on the oscillator signal;
an antenna coupled to the receive path and the transmit path and configured to transmit the second wireless communication signal;
an antenna tuner coupled to the transmit path and the antenna;
one or more environment sensors; and
a control path coupled to the antenna and the antenna tuner, the control path configured to;
receive one or more environment parameter signals from the one or more environment sensors, the one or more environment parameter signals indicative of an environment of the wireless communication element;
determine if an entry exists in a memory of the wireless communication element associated with the one or more environment parameter signals;
upon a determination that the entry does not exist, the control path further configured to;
sense an incident power transmitted to the antenna, and a reflected power reflected from the antenna;
determine a complex reflection coefficient based on the incident power and the reflected power;
calibrate an antenna tuner setting such that a determined error value, indicative of an estimated return loss for an antenna load, is less than a threshold error value, the determined error value based on a directivity value and a square of the reflection coefficient; and
store the entry in the memory, the entry associating the one or more environment parameter settings with the antenna tuner setting; and
upon a determination that the entry does exist, the control path further configured to;
determine the antenna tuner setting associated with the one or more environment parameter signals based on the entry; and
based on the antenna tuner setting, communicate one or more control signals to the antenna tuner for controlling an impedance of the antenna tuner.
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Abstract
In accordance with the present disclosure, method may include receiving one or more environment parameter signals indicative of an environment of a wireless communication element. The method may also include communicating one or more control signals to an antenna tuner of the wireless communication element for controlling an impedance of the antenna tuner based on the one or more environment parameter signals.
35 Citations
15 Claims
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1. A wireless communication element, comprising:
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a receive path configured to receive a first wireless communication signal and convert the first wireless communication signal into a first digital signal based at least on an oscillator signal; a transmit path configured to convert a second digital signal into a second wireless communication signal based at least on the oscillator signal; an antenna coupled to the receive path and the transmit path and configured to transmit the second wireless communication signal; an antenna tuner coupled to the transmit path and the antenna; one or more environment sensors; and a control path coupled to the antenna and the antenna tuner, the control path configured to; receive one or more environment parameter signals from the one or more environment sensors, the one or more environment parameter signals indicative of an environment of the wireless communication element; determine if an entry exists in a memory of the wireless communication element associated with the one or more environment parameter signals; upon a determination that the entry does not exist, the control path further configured to; sense an incident power transmitted to the antenna, and a reflected power reflected from the antenna; determine a complex reflection coefficient based on the incident power and the reflected power; calibrate an antenna tuner setting such that a determined error value, indicative of an estimated return loss for an antenna load, is less than a threshold error value, the determined error value based on a directivity value and a square of the reflection coefficient; and store the entry in the memory, the entry associating the one or more environment parameter settings with the antenna tuner setting; and upon a determination that the entry does exist, the control path further configured to; determine the antenna tuner setting associated with the one or more environment parameter signals based on the entry; and based on the antenna tuner setting, communicate one or more control signals to the antenna tuner for controlling an impedance of the antenna tuner. - View Dependent Claims (2, 3, 4, 5, 12, 13, 14, 15)
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6. A control path for control of an antenna tuner, comprising:
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a control module coupled to an antenna tuner, the control module configured to; receive one or more environment parameter signals from one or more environment sensors, the one or more environment parameter signals indicative of an environment of a wireless communication element; and a memory communicatively coupled to the control module, the memory configured to store one or more entries, each entry associating an antenna tuner setting for the antenna tuner to one or more environment parameter signals; the control module is further configured to determine if an entry exists in the memory associated with the one or more environment parameter signals; upon a determination that the entry does not exist, the control module further configured to; sense an incident power transmitted to the antenna, and a reflected power reflected from the antenna; determine a complex reflection coefficient based on the incident power and the reflected power; calibrate an antenna tuner setting such that a determined error value, indicative of an estimated return loss for an antenna load, is less than a threshold error value, the determined error value based on a directivity value and a square of the reflection coefficient; and store the entry in the memory, the entry associating the one or more environment parameter settings with the antenna tuner setting; and upon a determination that the entry does exist, the control module further configured to; determine the antenna tuner setting associated with the one or more environment parameter signals based on the entry; and based on the antenna tuner setting, communicate one or more control signals to the antenna tuner for controlling an impedance of the antenna tuner. - View Dependent Claims (7, 8, 9, 10)
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11. A method performed by a wireless communication element, comprising:
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receiving one or more environment parameter signals from one or more environment sensors, the one or more environment parameter signals indicative of an environment of a wireless communication element; determining if an entry exists in a memory of the wireless communication element, the entry associated with the one or more environment parameter signals; upon determining that the entry does not exist; sensing an incident power transmitted to the antenna and a reflected power reflected from the antenna; determining a complex reflection coefficient based on the incident power and the reflected power; calibrating an antenna tuner setting such that a determined error value, indicative of an estimated return loss for an antenna load, is less than a threshold error value, the determined error value based on a directivity value and a square of the reflection coefficient; and storing an entry in the memory, the entry associating the one or more environment parameter settings with an antenna tuner setting associated with the calibration of the antenna tuner; upon determining that the entry does exist; determining the antenna tuner setting associated with the one or more environment parameter signals based on the entry; and based on the antenna tuner setting, communicating one or more control signals to an antenna tuner of the wireless communication element for controlling an impedance of the antenna tuner.
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Specification