ABSTRACT
This paper presents the design of triangular microstrip patch antenna at 1.6 GHz Further by applying fractal geometry to the star shaped antenna Koch Snowflake Fractal Antenna is designed. The Koch snowflake antenna is used for size reduction. To improve gain and bandwidth, suspended technique is used. The self similar and space-filling property of fractal geometry, antenna operates at lower resonant frequency. From the results we get it is observed that, as the iteration and the iteration factor increases, the resonant frequency of the patch antenna decreases. Broad band operation with size reduction is obtained. In this paper fractal antenna using Koch Snowflake fractal geometry up to second is presented Antenna design tool CAD-FEKO 6.3 is used to simulate and design. The simulated antenna has Koch Curve shape at the patch with suspended ground plane. Further the radiation pattern and input impedance they obtain are similar to the larger multiband antennas. Koch Snowflake helps in fitting large electrical lengths into small volume. FR4 substrate having dielectric constant -4.4 is used for designing the antenna and is fed with 50 ohms coaxial line. By optimizing the coaxial feed and its location the antenna has been optimized to operate in multiple bands of 1.41-1.65GHz, 3.41-3.81GHz, &7.75-8.13GHz.
