Electronic device with adjustable wireless circuitry

An electronic device that wirelessly communicates with external equipment, comprising:

• an antenna having an antenna resonating element, a feed path coupled to the antenna resonating element, and an antenna ground;
• wireless radio-frequency transceiver circuitry that transmits and receives radio-frequency signals through the antenna;
• a tunable component that is interposed on a tuning circuit path that is coupled between the antenna resonating element and the antenna ground, wherein the tunable component tunes the antenna;
• control circuitry that tunes the tunable component to tune the antenna based on information received from the external equipment;
• and
• a coupler that is interposed on the tuning circuit path and coupled to the wireless radio-frequency transceiver circuitry, wherein the control circuitry uses the coupler to gather antenna impedance information on the antenna.

An electronic device that wirelessly communicates with external equipment, comprising:

• an antenna having an antenna resonating element, a feed path coupled to the antenna resonating element, and an antenna ground;
• wireless radio-frequency transceiver circuitry that transmits and receives radio-frequency signals through the antenna;
• control circuitry that tunes the tunable component to tune the antenna based on information received from the external equipment;
• a first coupler that is coupled to a first location on the antenna resonating element;
• and
• a second coupler that is coupled to a second location on the antenna resonating element that is different from the first location, wherein the control circuitry uses the first and second couplers to gather antenna impedance information on the antenna.