Patent ID: 7394429

Claim:
A wireless communication device for transmitting multiple electromagnetic waves within a frequency band wherein the frequency band comprises multiple frequency channels, comprising: a shell having a first shielding surface and a second shielding surface for shielding electromagnetic waves, wherein the first shielding surface is substantially parallel to the second shielding surface, and a third shielding surface and a fourth shielding surface; a wireless communication module including a first communication unit, a second communication unit, a third communication unit and a fourth communication unit; and an antenna module connected to the wireless communication module, the antenna module having a first antenna unit disposed outside the first shielding surface, a second antenna unit disposed outside the second shielding surface, a third antenna unit disposed outside of the third shielding surface and a fourth antenna unit disposed outside of the fourth shielding surface; wherein the first antenna unit connects to the first communication unit for transmitting a first electromagnetic wave, the second antenna unit connects to the second antenna unit for transmitting a second electromagnetic wave, the polarity direction of the first electromagnetic wave and the polarity direction of the second electromagnetic wave are substantially perpendicular, the first electromagnetic wave and the second electromagnetic wave are of the same frequency channel, the third shielding surface is substantially parallel to the fourth shielding surface, the third antenna unit connects to the third communication unit for transmitting a third electromagnetic wave and the fourth antenna unit connects to the fourth antenna unit for transmitting a fourth electromagnetic wave, and the polarity direction of the third electromagnetic wave and the polarity direction of the fourth electromagnetic wave are substantially perpendicular.