Miniature behaviour of microstrip antennas with Sierpinski bowtie geometry is investigated and the existence of fracton modes is studied. A fracton mode is a mode found at a higher frequency than the one obtained for the fundamental mode. The antenna presents as many fracton-modes as fractal iterations. These fracton modes are interesting because they provide a broadside radiation pattern with higher directivity than that obtained from the fundamental mode.
Montesinos, G. [et al.]. The Sierpinski fractal bowtie patch: a multifracton-mode antenna. A: IEEE International Symposium on Antennas and Propagation. "2002 digest, IEEE Antennas and Propagation Society international symposium: June 16-21, 2002, San Antonio, Texas; held in conjunction with: USNC/URSI National Radio Science Meeting". San Antonio, Texas: Institute of Electrical and Electronics Engineers (IEEE), 2002, p. 542-545.