Antenna structure and wireless communication device using same

A wireless communication device comprising:

• an antenna structure, the antenna structure comprising:
• a metal housing, the metal housing comprising a front frame, a backboard, and a side frame, the side frame being between the front frame and the backboard;
• wherein the side frame defines a slot, the front frame defines a groove and a gap, the groove and the gap both in communication with the slot and extend to cut across the front frame;
• wherein the metal housing is divided into at least an antenna section by the slot, the groove, and the gap;
• and wherein the antenna section comprises a first section and a second section perpendicular to the first section;
• a first resonance portion;
• a second resonance portion;
• an extending portion;
• and
• a signal feed source;
• wherein the first resonance portion, the second resonance portion, and the extending portion are spaced apart from each other and are at a receiving space defined from the first section and the second section to the groove and the gap;
• wherein the first resonance portion is directly and electrically connected to the antenna section or is spaced apart and electrically coupled to the antenna section;
• wherein the second resonance portion is electrically connected to the antenna section;
• wherein the extending portion is directly and electrically connected to the antenna section or is spaced apart and electrically coupled to the antenna section;
• and
• wherein one of the first resonance portion and the second resonance portion is electrically connected to the signal feed source, and the other one of the first resonance portion and the second resonance portion is grounded.