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Hilbert curve fractal antenna: A small resonant antenna for VHF/UHF applications
Author(s) -
Vinoy K. J.,
Jose K. A.,
Varadan V. K.,
Varadan V. V.
Publication year - 2001
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.1136
Subject(s) - fractal antenna , antenna (radio) , antenna measurement , radiation pattern , dipole antenna , coaxial antenna , physics , monopole antenna , hilbert curve , loop antenna , fractal , antenna factor , optics , acoustics , mathematics , geometry , electrical engineering , engineering , mathematical analysis
The usefulness of fractal Hilbert curves in antenna geometry is explored here for the first time. Apart from being simple and self‐similar, these curves have the additional property of approximately filling a plane. These properties are exploited in realizing a “small” resonant antenna. This approach has resulted in an antenna size smaller than λ/10 and still resonant, with performance comparable to a dipole whose resonant length is close to λ/2. Numerical predictions of the input impedance of the antenna have been compared with experiments. The effect of additional fractal iterations on the reduction of the resonant frequency has been studied. The radiation characteristics of the antenna at the resonant frequencies provided show that this is very similar to the dipole characteristics. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 29: 215–219, 2001.