A Compact Dual-band Slot Antenna Based on Koch Fractal Snowflake Annular Ring

This paper presents the design of a compact dual-band slot antenna for use in the recently available wireless communication applications. The slot structure of the proposed antenna is based on an annular slot-ring with Koch snowflake fractal geometry of the third iteration. The antenna slot structure has been etched on the ground plane of a substrate with relative permittivity of 4.5 and 1.524mm thickness. On the other side of the substrate, a 50-Ohm microstrip line has been etched as the antenna feed structure. The proposed antenna has a compact size of (40 x 40 x 1.524) mm(3). Simulation results show that the proposed antenna could excite two resonant bands. The lower resonant band extends from (2.38-3.03) GHz while the upper resonant band extends from (4.45-5.06) GHz. This makes the antenna suitable for a wide range of currently available communication services.