Yagi Uda Antenna with Integrated Balun for WLAN Application
For Wireless Local Area Networks (WLANs) communication standards, frequencies of 2.4GHz and 5GHz have been widely used. A large number of Access Points (APs) is needed inside high buildings, due to the presence of shadowing areas, to achieve ubiquitous coverage of WLAN systems. An AP is commonly attached on the wall or ceiling to provide coverage in a specified area. Therefore, the antenna for WLAN AP requires not only dual band operation but also an insignificant back-radiation. For dual-band applications, several antennas including the printed dipole antennas, or slot-monopole antenna were reported.