Antenna structure and wireless communication device using the same

A wireless communication device comprising:

• an antenna structure comprising:
• a plurality of first antenna units;
• and
• a plurality of second antenna units, each of the second antenna units is positioned adjacent the first antenna units, each of the first antenna units and each of the second antenna units is restricted to emit a radio beam in a single polarization direction, the first antenna unit emits radio waves in a first polarization direction, the second antenna unit emits radio waves in a second polarization direction;
• wherein the first polarization direction is perpendicular to the second polarization direction;
• wherein each of the first antenna unit comprises a first antenna, each of the first antennas comprises a main body, and a first end of the main body portion defines two notches configured for increasing a bandwidth of the first antenna.