Patent ID: 8723739

Claim:
A multi-frequency antenna, comprising: a substrate; an antenna portion being deposited on the substrate and located in one side of the substrate, the antenna portion comprising a low-frequency radiation antenna and a high-frequency radiation antenna, the low-frequency radiation antenna including a first connecting arm, a long arm, a second connecting arm and a short arm, the long arm having a front end connected to a top of the first connecting arm and a rear end connected to an upper end of the second connecting arm, the second connecting arm having a lower end connected to the short arm, the second connecting arm being aligned with the first connecting arm, the short arm being aligned with the long arm, the high-frequency radiation antenna including a matching arm, a third connecting arm, a first coupler, a second coupler, a short-circuit member and a grounding arm, the matching arm having a rear end connected to a bottom of the first connecting arm, the third connecting arm having a lower end connected to a front end of the matching arm, the first coupler being connected to an upper end of the third connecting arm and aligned with the matching arm, the second coupler being deposited between a top of the substrate and the first coupler, the short-circuit member having an upper end connected to the second coupler, the short-circuit member having a lower end connected to the grounding arm, and the grounding arm being deposited between a bottom of the substrate and the matching arm; and a radiator being deposited on the top of the substrate and facing the long arm of low-frequency radiation antenna and the second coupler of the high-frequency radiation antenna in the antenna portion, and the radiator being connected to the second coupler of the high-frequency radiation antenna.