Antenna module

An antenna module, comprising:

• a metal housing having accommodating space;
• and a circuit board accommodated in the accommodating space, wherein the metal housing comprises a metal back cover and a metal side wall, the metal side wall comprises a side wall main body and a first radiator extending from an end of the side wall main body, a second radiator extending from another end of the side wall main body which is spaced with and arranged opposite to the first radiator, and a third radiator provided between the first radiator and the second radiator, the third radiator forms a first fracture and a second fracture respectively with the first radiator and the second radiator, the first radiator, the second radiator and the third radiator are respectively spaced with the metal back cover to form a coupling gap, a headroom region is formed between the third radiator and the circuit board, a grounding circuit and a feeding circuit are extended from the third radiator and are electrically connected with the circuit board, respectively;
• and
• wherein the coupling gap is provided on the metal side wall, the radio frequency switch comprises a first position, a second position, a third position and a fourth position, when the radio frequency switch is turned to the first position, a capacitance with a capacitance value of 0 pF is connected in the grounding circuit, when the radio frequency switch is turned to the second position, a capacitance with a capacitance value of 0.3 pF is connected in the grounding circuit when the radio frequency switch is turned to the third position, a capacitance with a capacitance value of 0.8 pF is connected in the grounding circuit when the radio frequency switch is turned to the fourth position, an inductance with an inductance value of 3 nH is connected in the grounding circuit.