Hybrid Fractally Expanded Cross Antenna

하이브리드 후렉틀 확장 크로스 안테나

  • 장정민 ;
  • 이상설
  • Published : 2000.12.01

Abstract

A new fractal geometry of the traveling wave type cross antenna is newly presented. In the conventional type of the traveling wave antenna, the electrical length of the radiating conductor increases as the order of fractal expansion increases. But, increased length of the current path degrades the performance of the antenna from the various loss mechanism of the traveling wave type antenna. To reduce the antenna performance degradation, the new hybrid fractal antenna, which divides the entire fractal structure into some smaller ones and connects each smaller fractal group with a power divider is presented. The secondly, thirdly and fourthly expanded hybrid fractal cross antennas are fabricated and their performances are examined by measurements. Influences of the fractal order to the antenna performance are examined.

Keywords

References

  1. IEEE Trans. Antennas Propagat. v.38 no.5 The Cross Antenna: A New Low-Profile Circularly Polarized Radiator A. G. Roederer
  2. United States Patent 4804965 A. G. Roederer
  3. Proc. IEEE v.81 no.10 Prolog to special section on fractals in electrical engineering D. L. Jaggard
  4. The Fractal Geometry of Nature B. B. Mandelbrot
  5. Radio Sci. v.31 no.6 Frequency independent features of self-similar fractal antenna D. H. Werner;P. L. Werner
  6. French Patent 85 10463 A. G. Roederer
  7. The Science of Fractal images M. F. Barnsley;R. L. Devaney;B. B. Mandelbrot;H. O. Peilgen;D. Saupe;R. F. Voss;Y. Fisher;M. McGuire
  8. Proc. Inst. Elec. Eng. v.132 no.7 Radiation characteristics and polarization of undulated microstrip line antennas L. Shafai;A. A. Sebak
  9. Proc. IEEE v.74 no.9 The fractal random array Y. Kim;D. L. Jaggard
  10. Recent Advances in Electromagnetic Theory On fractal electrodynamics D. L. Jaggard;H. N. Kritikos(ed.);D. L. Jaggard(ed.)
  11. Electromagnetic Symmetry Fractal electrodynamics: Wave interactions with discretely self-similar structure D. L. Jaggard;C. E. Baum(ed.);H. N. Kritikos(ed.)