Journal
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Volume 7, Issue -, Pages 738-741Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2008.2002808
Keywords
Fractal antenna; Koch fractal-shape; microstrip patch antenna; Sierpinski fractal-shape; small-size antenna
Funding
- National High Technology Development Program (863) of China [2003AA005044]
- Innovation Foundation [DY08101]
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A novel technique to reduce the size of microstrip patch antennas is proposed. By etching the patch edges according to Koch curves as inductive loading, and inserting the Sierpinski carpets into the patch as slot loading, it is experimentally found that the resonant frequency of the patch can be greatly lowered, and the higher the iteration order of the fractal shapes, the lower the resonant frequency becomes. And this property can be utilized to reduce the size of the microstrip patch antennas. It is also found that, the radiation patterns of the proposed fractal-shaped antennas maintained because of the self-similarity and centro-symmetry of the fractal shapes. The patches derived from this technique can find applications in integrated low-profile wireless communication systems.
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