Multi-frequency antenna

The invention relates to a multi-frequency antenna, which comprises a first radiating body, a feed-in piece, a first grounding piece, a second radiating body, a bridging piece and a second grounding piece, and is characterized in that the first radiating body is made of a metal plate; the feed-in element is electrically connected with the first radiator and is used for feeding in a signal; the first grounding piece is electrically connected with the first radiator; the second radiator is made of a metal plate, the second radiator surrounds the periphery of the first radiator, and a gap is formed between the first radiator and the second radiator; the jumper is electrically connected with the first radiator and the second radiator; the second grounding member is electrically connected with the second radiator. Therefore, the multi-frequency antenna is suitable for transmitting signals of a plurality of frequency bands. 一种多频天线，包含一第一辐射体、一馈入件、一第一接地件、一第二辐射体、一跨接件与一第二接地件，其中，第一辐射体为一金属板材所制成；馈入件电性连接第一辐射体，馈入件供馈入讯号；第一接地件