An Improved Compact & Multiband Fractal Antenna Using the Koch Curve Geometry

Manas Ranjan Jena^1, , B.B. Mangaraj¹ and Rajiv Pathak²

¹Deparment of ELTCE, VSSUT, Burla, Odisha, India

²BIT, Durg, Chhatisgadh, India

Cite this paper:
Manas Ranjan Jena, B.B. Mangaraj and Rajiv Pathak. An Improved Compact & Multiband Fractal Antenna Using the Koch Curve Geometry. Wireless and Mobile Technologies. 2014; 2(1):1-6. doi: 10.12691/wmt-2-1-1

Abstract

In this paper, we have achieved an compact & multiband fractal antenna using a Koch curve geometry. The simulation of the proposed antenna is done by CST Microwave Studio EM simulation software. The proposed Koch curve fractal antenna proves that it is capable to create multiband frequencies. The proposed fractal antenna is designed on FR-4 substrate with ℇr= 4.4. The antenna is fed with the probe feed method. We got two resonant frequencies like 32.84GHz & 34.28GHz which shows multiband characteristics. Simulated results shows that the return loss is better than 15 dB, the VSWR is less than 1.3, the directivity is greater than 6dBi & the gain is more than 6dB in each band. So this fractal antenna can be suitable for the radio astronomy & space research applications.

Keywords:
fractal antenna koch curve CST IFS self similarity self filling multiband

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References:

[1]	Balanis, Constantine, “Antenna theory-Analysis and Design”, John Wiley & Sons Ltd, Reprinted 2008.
[2]	B. B. Mandelbrot, “The Fractal Geometry of Nature” San Francisco, CA: Freeman, 1983.
[3]	N. Cohen, “Fractal Antenna Application In Wireless Telecommunications” Proceedings of Electronics Industries Forum of New England, 1997, pp. 43-49.
[4]	R.M. Crownover, “Introduction to Fractals and Chaos, Boston”, MA Jones & Bartlett, 1995.
[5]	D. H. Werner, P. L. Werner, and K. H. Church, “Genetically engineered multi-band fractal antennas,” Electron. Lett., vol. 37, no. 19, pp. 1150-1151, Sep. 2001.
[6]	B. Manimegalai, S. Raju, & V. Abhaikumar, “A multi fractal cantor antenna for multiband wireless applications,” IEEE Antennas Wireless Propag. Lett., vol. 8, pp. 359-362, 2009.
[7]	D. H. Werner and S. Ganguly, “An overview of fractal antenna engineering research,” IEEE Antennas Propag. Mag., vol. 45, no. 1, pp. 38-57, Feb. 2003.
[8]	K. J. Vinoy, “Fractal Shaped Antenna Elements for Wide and Multi-Band Wireless Applications” Thesis, Pennsylvania, Aug. 2002.
[9]	Best S.R. “The Effectiveness of Space Filling Fractal Geometry in Lowering Resonant Frequency”, Antennas & Propagation Letters, Vol. 1, (2002), 112-115.
[10]	X. Yang, J. Chiochetti, D. Papadopoulos, and L. Susman, “Fractal antenna elements and arrays,” Appl. Microw. Wireless, vol. 5, no. 11, pp. 34-46, May 1999.
[11]	Puente, C., Romeu, J., and Cardama, A. (2000). “The Koch Monopo le: A Small Fractal Antenna”. IEEE Transactions On Antennas And Propagation 48 (11).
[12]	Best, S.R. (2002). “On the resonant properties of the Koch fractal and other wire monopole antennas”. IEEE Antennas and Wireless Propagation Letters. 1 (1).
[13]	Vinoy, K. J., Abraham, J.K., and Varadan, V.K. (2003). “Fractal dimension & frequency response of fractal shaped antennas”. IEEE Antennas &Propagation Society International Symposium. 22-27 June. Volume 4, 222-225.