A switchable four-sector shaped-beam antenna for MM-wave wireless LANs

The paper presents a four-sector shaped-beam antenna suitable for base station (BS) antennas in the 60 GHz band. This antenna has a plateau configuration whose four side walls have four linearly arranged patch array antenna, respectively. Each trapezoidal facet consisting of four linearly arranged patch array antennas excites a shaped beam in the elevation plane in order to cover from a small depression angle to the nadir, considering the radiation pattern of the developed remote terminal antennas. In order to suppress unwanted multipath delayed waves, they excite right-handed circularly polarised waves.