A quad-band hybrid fractal antenna for wireless applications

Abstract

Hybrid fractal multiband antenna is designed using Koch and meander geometry and its characteristics are investigated. The proposed antenna helps to achieve multiband behavior due to its multiple resonance characteristics. It has planar structure, compact size and suitable for wireless applications. IFS approach has been used to obtain the hybrid structure using MATLAB and scripting method of HFSS. Perturbation of basic structure is done to achieve quad-band behavior. Proposed antenna resonates at four different frequencies including Bluetooth (2.12-2.95 GHz), WLAN (4.82-5.95 GHz), 4.07 GHz and 7.3 GHz. It is a low cost antenna designed on easily available FR4 substrate. It exhibits nearly omnidirectional radiation pattern and VSWR ≤ 2 for all resonating frequencies.