A multi-frequency antenna (100) comprises a radiating patch (20) having a first radiating body operating in lower frequency band and a second radiating body operating in higher frequency band; a grounding patch (10) spaced apart from the radiating patch; a connecting element (30) electrically connecting the first radiating body, the second radiating body, and the grounding patch; a feeding line (5) comprising an inner conductor and an outer conductor. The first radiating body comprises a first radiating element and a second radiating element extending from the first radiating element. The second radiating body comprises the first radiating element and a third radiating element extending from the first radiating element. The radiating patch also comprises a fourth radiating element extending from an end of the connecting element and a coupling element extending from the grounding patch. The inner conductor electrically connects to a joint of the fourth radiating element and the connecting element. The outer conductor electrically connects to the grounding patch.