Communication device with conductive housing and antenna element therein

A communication device with an upper cover and a lower cover, comprising:

• a conductive housing, comprising a first conductive surface and a second conductive surface, wherein the first conductive surface is disposed on a surface of the upper cover, the second conductive surface is disposed on a surface of the lower cover, the first conductive surface and the second conductive surface are coupled to each other, and a first edge of the first conductive surface is adjacent to a second edge of the second conductive surface;
• and
• an antenna element, disposed substantially between the first edge and the second edge, wherein the antenna element is excited to form a first band and a second band, and the antenna element comprises:
• a ground element, coupled to the second conductive surface;
• a first radiating element, excited to generate at least one resonant mode in the second band, wherein one end of the first radiating element is coupled to a signal source;
• and
• a second radiating element, wherein one end of the second radiating element is coupled to the signal source and to the first radiating element, and the other end of the second radiating element is a grounding end coupled to the ground element such that the antenna element provides a closed resonant path excited to generate at least one resonant mode in the first band.