An antenna module is provided. The antenna module includes two directional antennae which are back to back set and a converter. The converter realizes the conversion between the omni antenna mode and the directional antenna mode by switching on the two directional antennae simultaneously or switching on one of the directional antennae. The other example of the antenna module includes a horizontal polarization antenna and a vertical polarization antenna and a converter. The converter realizes the conversion between the horizontal polarization antenna mode and the vertical polarization antenna mode by switching on the horizontal polarization antenna or the vertical polarization antenna.
