Dipole antenna

A dipole antenna comprising:

• an elongate substrate;
• a first conductive piece on the substrate, the first conductive piece including a main part, a straight part extending from one end of the main part along a lengthwise direction of the elongate substrate, and a bent part extending from and located at a lateral side of the main part, a free end of the straight part defining a feeding point, the main part being adapted for controlling a current resonant path in a 5 GHz frequency band while the bent part being adapted for controlling a current resonant path in a 2.4 GHz frequency band;
• a second conductive piece on the substrate and separated from the first conductive piece, the second conductive piece including a bent portion, two U-shaped portions, and a ground portion connected between the bent portion and the two U-shaped portions;
• and
• a third conductive piece on the substrate and separated from the first conductive piece and the second conductive piece;
• wherein
• the main part of the first conductive piece includes a connecting portion connected to the straight part, a meander portion connected at one end thereof to the connecting portion, and an end portion connected to an opposite end of the meander portion;
• and
• the straight part of the first conductive piece is disposed between the two U-shaped portions of the second conductive piece.