Fractal Metamaterial multiband antenna

What is it about?

Abstract: This paper presents design of a low cost fractal antenna loaded with parasitic edge coupled (EC) split ring resonators(SRR). Parasitic EC-SRR elements results in improved impedance matching leading to improved bandwidth. The basic resonant structure is a circular patch antenna designed at 3.2GHz on low cost FR4 substrate with relative permittivity 4.4, and 1.6mm thickness. A single iteration of circular patch and slots are used to make it fractal in order to achieve multiband performance, the antenna is inset fed by a 50Ω microstrip line. A prototype of the proposed antenna is fabricated and tested for results, a comparison between fractal antenna with and without SRRs is made and the results confirms that a better impedance matching is achieved in later case, also a 3% increase in bandwidth is achieved at 8.5GHz . A good agreement between simulated and measured results is obtained, an estimated gain of 13.3 dB is provided by the proposed antenna. The overall dimensions of the antenna are 45mm x 45mm and it may be used for wireless applications at 3GHz, 5GHz, 6.8GHz, 7.5GHz and 8.5GHz with an average bandwidth of 200MHz.

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Why is it important?

Multiband High gain and good bandwidth

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