Amirhossein Hajbagheri - Electrical Engineering Department Imam Khomeini International University, Tehran-Iran,
Amir Arayeshnia - Electrical Engineering Department Imam Khomeini International University, Tehran-Iran.

Smaller and multiband antenna designing has always been one of the engineers’ concerns. To achieve this, various methods have been proposed, one of them is employing the fractal geometries in antenna design. Due to their self-similar properties, fractal geometry makes antenna multiband. Also as increase the electrical length of antenna in limited area, Antenna Impedance increase and antenna size reduce. This antenna is a dipole which is formed by combination of Koch and Tree fractal geometries. The proposed antenna have been analyzed by CST Studio Suit and FEKO, which use FDTD and FEM methods respectively. The proposed antenna has several features such as omnidirectional pattern and miniaturized size. The omnidirectional radiation pattern of the proposed antenna is suitable for Wi-Fi, WIMAX and access point application

wire antenna, fractal, combination fractals, Koch fractal, tree fractal, miniaturize