Triple frequency circular patch antenna

An enhanced but simple triple band circular ring patch antenna with a new slotting technique is presented, which is most suitable for X-band, Ku-band and K-band applications. This compact micro strip antenna is obtained by inserting small rectangular strip in a circular ring patch antenna. The antenna has been designed and simulated on an FR4 substrate with dielectric constant of 4.4 and thickness of 2mm. The design is analysed by Finite Element Method based HFSS Simulator Software (version 14.0), The simulated return losses obtained are −35.80dB, −42.39dB, and −44.98dB at 8.96 GHz, 14.44 GHz, 18.97 GHz respectively. Therefore, this antenna can be applicable for X-band, Ku-band and K-band applications respectively.