In this example, a compact Ku-band antenna array is demonstrated for use in mobile device applications. The antenna is tuned for 12.5 GHz operation and contains a 4x4 array of elements which each consist of a set of patch antennas oriented and phased to produce a circularly-polarized far field pattern. The antenna array has peak gain over 20.7 dBi with sidelobes less than 8 dBi and a 3 dB beamwidth of about 15 degrees.
