Broadband multi-frequency dual-loop antenna increasing the impedance bandwidth and the radiation effect of the antenna

A broadband multi-frequency dual-loop antenna includes a first loop antenna with a first operating band and a second loop antenna with a second operating band, wherein the first loop antenna and the second loop antenna are connected in parallel to form an antenna array. A first ground line and a second ground line are respectively provided in the middle parts of the first loop antenna and the second loop antenna and disposed opposite to each other. The broadband multi-frequency dual-loop antenna further includes a feed cable having a central conductor and an outer conductor respectively welded to the feeding point and the ground point of the loop antenna. Therefore, a multi-frequency antenna is so small that it does not occupy the space of electronic device and has high working frequencies, thereby effectively increasing the impedance bandwidth and the radiation effect of the antenna.