Abstract: Emerging wireless communication antennas presently need to operate at ISM. In this paper, a Cantor fractal monopole antenna using multi fractal structure is proposed and presented for ISM band applications. The antenna is designed in FR4 substrate with dielectric constant of 4.6. Simulation is performed with CST microwave studio. The bandwidth of the antenna is optimized and the gain of the proposed antenna is improved.

Keywords: Cantor, fractal antenna , ISM band, multifractal.