Fractal-Element Antennas

Nathan Cohen
Fractal Antenna System, Inc. and Boston University

Abstract

Self-similar antennas have been known since Mushiake's 1948 work on self-complementary designs. However, it has only been in the last few years that fractal antennas have been extended to a more generalized design approach. We report the application of deterministic and random fractals to practical applications, especially in wireless telecommunications. The self-similar patterns can be exploited to incorporate one or more useful attributes including: substantial size shrinkage; broad or multi bandedness; increased gain; power pattern agility. Used as miniature antennae, fractals have much to offer in terms of size and cost savings, as well as reliability. We describe 'antenna-less' (that is, hidden) uses of fractal antennae in hand-held environments as well as some surprising uses for other needs.

Nathan Cohen
Fractal Antenna System, Inc.,
2 Ledgewood Place
Belmont MA 02178
617-489-6952
and
Science and Engineering Program
Boston University
Boston MA*
* fractenna @aol.com