Multi-band dipole antenna

A multi-band dipole antenna comprising:

• a substrate;
• a first radiator section disposed on said substrate and having a first grounding end and a first conductor arm that extends from said first grounding end in a first direction;
• a second radiator section disposed on said substrate, spaced apart from said first radiator section, and having a second grounding end and a second conductor arm that extends from said second grounding end in a second direction;
• a first mirroring radiator section symmetrically disposed on said substrate with respect to said first radiator section and spaced apart from said first radiator section, said first radiator section and said first mirroring radiator section having substantially equal lengths, said first mirroring radiator section including a feed-in end that is adjacent to said first grounding end and a first mirroring conductor arm that extends from said feed-in end in a direction opposite to the first direction, said first radiator section cooperating with said first mirroring radiator section to resonate in a first frequency band;
• a balun disposed on said substrate and having a main body, a first connecting end electrically connected to said first mirroring conductor arm, and a third grounding end, said first connecting end and said third grounding end being disposed respectively on opposite ends of said main body;
• and
• a second mirroring radiator section disposed on said substrate and including a second connecting end that is electrically connected to said main body of said balun, and a second mirroring conductor arm that extends from said second connecting end in a direction opposite to the second direction, said second radiator section cooperating with said second mirroring radiator section to resonate in a second frequency band.