Printed multiple ring fractal antennas

This paper describes a novel simple structure of printed multiple ring fractal antennas and the improved designs of the printed multiple ring antennas by varying the shape of the circular structure to an elliptical one. Many possibilities of improved design have been investigated by varying the width of the outer ring. In comparison to multiple ring monopole antennas, this type of structure can achieve larger bandwidth with proper design. It is an alternative to the recently reported multiple ring monopole antennas and some other fractal antennas.