A DUAL BAND FRACTAL SLOT ANTENNA LOADED WITH JERUSALEM CROSSES FOR WIRELESS AND WIMAX COMMUNICATIONS
Mohammad Sadegh Sedghi, Mohammad Naser‐Moghadasi, Ferdows B. Zarrabi · Progress In Electromagnetics Research Letters · 2016
In this paper, a combination of the Jerusalem cross (JC) as a fractal load and fractal Minkowski slot antenna for dual-band application is investigated.The prototype slot antenna has a Minkowski fractal formation with four Jerusalem cross (JC) loads to achieve dual-band application with compact size to improve the bandwidth.A T-shaped feed line is implemented in the final modeled antenna.The fabricated antenna has a bi-directional pattern with sufficient bandwidth at 2.4-3.1 GHz and 5.1-5.9GHz with VSWR < 2 for Wi-Fi, WiMAX, Bluetooth application as well as an IEEE WLAN protocol with a gain of 5-6 dBi, respectively.The size of the prototype patch antenna is 40×40 mm 2 , and the antenna is designed and fabricated on an FR-4 low cost substrate with ε r = 4.4 and thickness of 1.6 mm.It is simulated by HFSS full wave software.In addition, the VSWR, pattern and axial ratio of experimental results are presented and compared with simulation models.As a result, improvements of the Jerusalem cross compared with conventional cross have been achieved with some parameter tuning to improve the bandwidth.