Antenna structure and wireless communication device

An antenna structure applied to a wireless communication device comprising a display unit, the antenna structure comprising:

• a metal housing comprising a metal frame and a metal backplane, the metal frame arranged around an edge of the metal backplane and provided with a slot, a first gap, a second gap, and a third gap, the first gap, the second gap, and the third gap coupled to the slot, and the slot, the first gap, the second gap, and the third gap dividing the metal frame into a radiating portion and a first coupling portion, a portion of the metal frame between the first gap and the third gap forming the radiating portion, and a portion of the metal frame between the second gap and the third gap forming the first coupling portion;
• the metal frame comprising an end portion, a first side portion, and a second side portion, the first side portion and the second side portion respectively coupled at opposite ends of the end portion, the slot defined in the end portion and extending in the direction of the first side portion and the second side portion, the first gap defined in the end portion and located adjacent to the second side portion, the second gap defined in the first side portion and located adjacent to the end portion, the third gap defined between the first gap and the second gap, a portion of the metal frame between the first gap and an end point of the slot located on the second side portion forming a second coupling portion;
• a feeding portion electrically coupled to the radiating portion to feed an electric signal to the radiating portion;
• a first ground portion electrically coupled to the radiating portion to provide ground to the radiating portion;
• and
• a second ground portion, one end of the second ground portion electrically coupled to the second coupling portion, and another end of the second ground portion grounded;
• wherein when the feeding portion feeds an electric current, the electric current flows through the radiating portion toward the third gap, and then is coupled to the first coupling portion through the third gap and excites a first operating mode to generate a radiation signal in a first radiation frequency band;
• when the feeding portion feeds the electric current, the electric current flows through the radiating portion, and then is coupled to the second coupling portion through the first gap, and then is grounded through the second ground portion and excites a second operating mode to generate a radiation signal in a second radiation frequency band;
• and
• a frequency of the first radiation frequency band is lower than a frequency of the second radiation frequency band.