Broadband internal antenna using electromagnetic coupling supporting improved impedance matching

Disclosed is an internal antenna using electromagnetic coupling supporting improved impedance matching. The disclosed antenna comprises: a first electrically conductive member of which one terminal is electrically connected to an electrical power point; a second electrically conductive member which is electrically connected to the earth at a predetermined distance from the first electrically conductive member; an emitter which extends from the second electrically conductive member; and an earthing plate which is coupled to the other terminal of the first electrically conductive member. The disclosed antenna has the advantage that impedance matching characteristics can be improved while ensuring appropriate broadband characteristics and multi-band characteristics.