Dual-band dipole antenna and electronic device

A dual-band dipole antenna, comprising:

• a dielectric carrier comprising a first surface;
• a first radiator and a second radiator disposed in opposite areas of the first surface and having different structural shapes;
• a coupled radiator disposed on the first surface and extending from the second radiator toward the first radiator, wherein there is a coupling slot between the coupled radiator and the first radiator;
• a coaxial cable comprising an inner conductor, a first insulating layer, an outer conductor and a second insulating layer, wherein the first insulating layer covers a portion of a surface of the inner conductor, so that one end of the inner conductor is exposed, and the exposed inner conductor is electrically connected to the second radiator;
• the outer conductor covers a portion of a surface of the first insulating layer;
• the second insulating layer covers a portion of a surface of the outer conductor, so that a portion of the outer conductor is exposed, and the exposed outer conductor is electrically connected to the first radiator;
• and
• a balun line having a serpentine structure and disposed on the first surface, wherein one end of the balun line is connected to the first radiator, and the other end of the balun line is connected to the second radiator;
• wherein the first radiator, the second radiator and the coupled radiator are configured to generate a first resonance mode, a second resonance mode and a third resonance mode.