On the design of inscribed triangle non‐concentric circular fractal antenna

This article presents the new ultra‐wideband fractal antenna with CPW‐fed.The fractal antenna has been fabricated on substrate εr = 4.3 mm and thickness h = 1.53 mm with 15‐mm radius. This antenna inscribed triangles in non‐concentric circles with varied radius offers the excellent bandwidth around 13.54 GHz (span from 1.335 to 14.88 GHz) corresponding to 167% impedance bandwidth at S11 < −10 dB. The first resonant frequency of fractal antenna shifted to 1.51 GHz by the application of fractal geometry in comparison to solid circular disc monopole first resonant frequency 2.215 GHz. This indicates the size reduction of the antenna. The experimental radiation patterns of the antenna are nearly omni directional. The proposed antenna is useful for mobile communication and UWB communication system.