Disclosed is a charger for a smart ring that includes a charger island disposed to the charger and configured to receive the smart ring. The charger island has a plurality of transmit antennas located in or on the charger island. When activated, a transmit antenna is configured to couple, via a Near Field Communication (NFC) chip/circuit, with a receive antenna on the smart ring for charging thereof. The active transmit antenna is based on an orientation of the smart ring on the charger island where the charging is performed regardless of alignment between the ring and the charger island. A conductive sheet can be included between the plurality of transmit antennas and an interior of the charger island in order to isolate the plurality of transmit antennas from one another.