Effect on Multiband Behavior of Square Fractal Dipole Antenna with the Variation of Angle between Square Fractals
Rajni Bala1, Jaswinder Singh2

1Rajni Bala, Pursuing M.Tech, Department of Electronics and Communication, Beant College of Engineering and Technology, Gurdaspur (Punjab), India.
2Dr. Jaswinder Singh, Associate Professor, Department of Electronics and Communication, Beant College of Engineering and Technology, Gurdaspur (Punjab) India.

Manuscript received on 21 May 2013 | Revised Manuscript received on 28 May 2013 | Manuscript published on 30 May 2013 | PP: 72-75 | Volume-2 Issue-2, May 2013 | Retrieval Number: B0599052213/2013©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: In this paper the design of square shape multiband dipole antenna using fractal geometry is described. The fractal antenna has been designed on substrate FR-4 having thickness h=1.4mm, = 4.4 with dimension 70×35mm. Ansoft HFSS software has been used to design and simulate the antenna. The antenna exhibit multiband resonances due to the self similarity in its structure. Firstly antenna was designed up to fourth iteration by keeping angle of 45 0 between adjacent squares. The experimental result indicates that the antenna resonates at six frequencies 0.75GHz, 2.15 GHz, 3.35 GHz, 4.65 GHz, 5.95 GHz and 7.25 GHz. It is observed that the multiband behavior of antenna is affected by the variation in angle between adjacent square fractals. In same design when angle between adjacent square fractals is reduced up to 100 the resonance frequencies also get reduced up to three, but at these three resonant frequencies the percentage of bandwidth get increased which means antenna shows wideband behavior.
Keywords: Multiband Antenna, Fractal, Resonant frequency

Scope of the Article: Smart Antenna