A multiband wide slotted antenna with Hilbert fractal slot on rectangular patch

A multiband wide slotted antenna with Hilbert fractal slot on rectangular patch is presented. By using a wide slotted structure, a Hilbert fractal slot with 1^st iterations in rectangular patch and microstrip fed line used as additional resonators producing multi-resonant frequencies for covering the wireless communication operations are developed. The results show good multiband operation with -10 dB impedance bandwidths of 22.22%, 17.22% and 9.58% at the frequency range of 0.87 - 0.96 GHz, 1.710 - 1.88 GHz, and 2.4 - 2.485 GHz, respectively. Finally, the presented antenna can operate and cover the applications of GSM, DCS, and Wireless Local Area Network WLAN IEEE802.11 b/g. Moreover, the antenna gains at operating frequencies of 0.9 GHz, 1.8 GHz, and 2.4 GHz are 2.84, 2.14, and 1.37 dBi, respectively. Especially, the antenna radiation patterns are almost the bi-directional at all of operating frequencies.