International Science and Technology Journal

This paper presents a design of the Koch Fractal Antenna for Wireless Applications. It was undertaken to construct an antenna prototype by using fractal patterns in order to obtain desired performance properties such as a compact size and monopole radiation pattern. One of the prevailing trends in modern wireless mobile devices is continuing decrease in physical size. In addition, as the integration of multiple wireless technologies becomes possible, the wireless devices can operate at multiple frequency bands. A reduction in physical size and multi-band capability is thus important design requirement for antennas in wireless devices. The use of fractal patterns in antenna design provides a simple and efficient method for obtaining the desired compactness and multi-band properties. Further, the size of the antenna was reduced by folding 2/3 of the Koch curve 90 degrees counterclockwise. A proof-of-concept fractal antenna was designed and built. A compact antenna based on the coaxial feeding technique was designed. The antenna was simulated for the operating frequency of 2.4 GHz the design process consisted of initial theoretical calculations followed by extensive software simulations, the results of which were used as guidelines for the physical antenna implementation. Numerical electromagnetic simulations were performed using the software AWR Microwave Office based on the Method-of-Moments (MOM) simulation technique. The antenna was fabricated as a monopole antenna printed on an FR-4 substrate and was discovered that it performs in agreement with design expectations. The results of both simulation and test were compared. The proposed antenna can be used for various wireless communication applications such as WLAN.