Dual band fractal monopoles

In this paper, two new dual band fractal antenna configurations are proposed. The proposed antennas are built on a partial ground plane and fed through a microstrip feed line. The basic design is based on the self similarity principle of fractal profiles but uses different slot geometries. The first antenna has an arrow-like complex slot while the other has only one simple rectangular wide slot. Numerical simulations are utilized to verify the simple design procedures of the proposed antenna structures. The second simple-slot dual band fractal monopole with self similarity factor of 1.5 has been realized on FR4 substrate and measured. Simulations and experimental results are in good agreement and demonstrate the good matching, bandwidth and radiation performance of the proposed antenna structures.