A compact dual-band slot antenna based on Koch fractal snowflake annular ring

Abstract

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 1.524 mm 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 × 40 × 1.524) mm3. 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.