Stacked patch antennas appropriate for remotely piloted aircraft applications

Two low cost stacked patch antennas designs operating at the Wi-Fi 2.4GHz frequency band for remotely piloted aircraft applications are presented in this study. The one is a stacked circular patch antenna with notches presenting 7dB gain, 380MHz bandwidth and circular polarization, while the second one is a stacked 4 element linear patch array with 14.2dB gain and 260MHz bandwidth, capable of beam-forming, appropriate for large distances. The array is integrated to a 1:4 Wilkinson power divider used as feeding network operating also in 2.4GHz frequency band, providing 370MHz bandwidth.