Numerical Analysis of the Irregular-Fractal Based Multiband Antennas

A building technique for fully reproducible irregular fractal structures is developed for multiband antenna design. The technique is based on a cluster-cluster aggregation model and employs discrete chaotic algorithm for pseudorandom sequence generation. The multiband behavior of irregular-fractal based antennas is studied by means of numerical analysis. In comparison to regular fractal antennas, more frequency bands are achieved. The spatial-frequency antenna characteristics are studied under feeding point displacements. As shown by numerical results, small displacements of feeding point change the radiation pattern in certain frequency bands. Larger feeding point displacements shift the antenna frequency bands.