Antenna tuning for wireless links

A method for tuning an antenna, comprising:

• generating, by one or more processors, a first antenna performance metric for a communication link between an antenna and a first device when the antenna is tuned according to one or more first tuning parameters, the first antenna performance metric based on an impedance metric for the antenna and a signal strength metric for the communication link, wherein the impedance metric is a measured parameter representing a reflection coefficient;
• updating, by one or more processors, a tuning configuration for the antenna according to one or more second tuning parameters by providing the one or more second tuning parameters to one or more aperture tuners;
• generating, by one or more processors, a second antenna performance metric for the communication link based on an impedance metric for the antenna and a signal strength metric for the communication link when the antenna is tuned according to the updated tuning configuration;
• determining, by one or more processors, whether the first antenna performance metric is higher than the second antenna performance metric;
• and
• reverting, by the one or more processors in response to determining that the first antenna performance metric is higher than the second antenna performance metric, the tuning configuration for the antenna according to the one or more first tuning parameters;
• wherein, in generating the first and second antenna performance metrics, the first and second antenna performance metrics are respectively computed based on a sum of weighted values for the impedance metric and the signal strength metric that are weighted according to predetermined weights.

A wearable device, comprising:

• an impedance tuner;
• an aperture tuner;
• an antenna;
• and
• one or more processors configured to:
• generate a first antenna performance metric for a communication link between an antenna and a first device when the antenna is tuned according to one or more first tuning parameters, the first antenna performance metric based on an impedance metric for the antenna and a signal strength metric for the communication link, wherein the impedance metric is a measured parameter representing a reflection coefficient;
• update a tuning configuration for the antenna according to one or more second tuning parameters by providing the one or more second tuning parameters to the one or more aperture tuners;
• generate a second antenna performance metric for the communication link based on an impedance metric for the antenna and a signal strength metric for the communication link when the antenna is tuned according to the updated tuning configuration;
• determine whether the first antenna performance metric is higher than the second antenna performance metric;
• and
• revert, in response to determining that the first antenna performance metric is higher than the second antenna performance metric, the tuning configuration for the antenna according to the one or more first tuning parameters;
• wherein, in generating the first and second antenna performance metrics, the one or more processors are configured to respectively compute the first and second antenna performance metrics based on a sum of weighted values for the impedance metric and the signal strength metric that are weighted according to predetermined weights.