Mobile device and antenna structure

A mobile device, comprising:

• a dielectric substrate, comprising a first protruded portion;
• a metal layer, lying on the dielectric substrate, and comprising an upper element and a main element, wherein the upper element is separated from the main element by a first region;
• a metal housing, being substantially a hollow structure, and having a first slit and a second slit, wherein the dielectric substrate and the metal layer are disposed inside the metal housing, and a first projection of the first slit with respect to the dielectric substrate at least partially overlaps the first region, and a second projection of the second slit with respect to the dielectric substrate at least partially overlaps the first protruded portion;
• a first nonconductive partition, at least partially disposed in the first slit of the metal housing;
• a second nonconductive partition, at least partially disposed in the second slit of the metal housing;
• a first connection element, disposed on the first protruded portion of the dielectric substrate, wherein a signal source is electrically coupled through the first connection element to the metal housing;
• and
• a second connection element, wherein the metal housing is electrically coupled through the second connection element to the main element of the metal layer,
• wherein the mobile device is capable of operating in multiple bands.