Example foldable electronic devices are provided. An example foldable electronic device includes an antenna apparatus including a first radiator, a second radiator, a first feeding circuit, a second feeding circuit, and a first tuning circuit. A length of the second radiator between a third open end and a second open end is greater than a length of the first radiator between a ground end and a first open end. When the electronic device is in a folded state, projections of the first open end and the second open end at least partially overlap, and a projection of the ground end is located between a first ground point and the second open end. The first tuning circuit is configured to adjust a second operating frequency band to be the same as or adjacent to a first operating frequency band.