Firouz Mhsenifard - Department of electrical, khormoj branch, Islamic azad university khormoj, iran
Susan Ershadi - Department of ICT, Lian university, boushehr, iran.

In this article explained the fractal theory. Also design and simulated a fractal antenna that it’s name is Hilbert. The height of this antenna is less than wave length. In addition to this antenna has high radiation resistance and little imaginary resistance comparison to monopole antenna. This antenna also is a multi band antenna, this means that antenna working in several frequency bands, and this is suitable for an antenna, because we can chose the best frequency band. The antenna dimension gets better for having a high efficiency and the most bandwidth in 168 MHz to 220 MHz frequencies. For simulating this antenna used the S-NEC software that is one of a specific for antenna design and simulation.

Fractal antenna, Hilbert fractal antenna,radiation pattern, imaginary resistance