According to one embodiment, a movable antenna includes a holder, an antenna radiator element attached to the holder, a first feed element that is attached to the holder and electromagnetically coupled to the antenna radiator element, a base plate in a facing arrangement with the holder, a second feed element on the base plate and configured to face and overlap at least a portion of the first feedelement, and a mechanism that moves the holder in a longitudinal direction of the second feed element while maintaining an interval between the first and second feed element permitting energy to be transferred between the first and second feed elements.