A wrist-worn electronic device comprises a housing, a printed circuit board, a location determining element, a first electrically conductive element, a second electrically conductive element, and a first loop antenna. The housing includes a side wall formed at least in part from an electrically conductive material and including an isolation portion formed from non-conductive material extending from an upper edge of the side wall to a lower edge of the side wall. The printed circuit board retains a first and second signal terminals. The location determining element receives a first electronic signal from the first signal terminal. The first loop antenna is formed by the first electrically conductive element, the second electrically conductive element, a first portion of a perimeter of the side wall, and a first circumferential portion of the printed circuit board.