Implementation of hybrid fractal metamaterial inspired frequency band reconfigurable multiband antenna for wireless applications

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Abstract
In the present paper authors propose the design and analysis of a hepta band metamaterial inspired octagonal shape antenna using hybrid fractals for wireless applications. Multiband characteristics in the designed antenna is accomplished by introducing of slotted octagonal shape radiating part with hybrid fractal form of Moore curve and Koch curve and two SRR cells. The frequency band reconfigurability is obtained with aid of PIN diodes placed inside the strips connected between Moore curve (fused with centered Koch curve) and feedline. During ON mode of PIN diode antenna operates at seven microwave frequency S-band WiMAX (3.4 similar to 3.69 GHz-IEEE 802.16e)/Lower C-band terrestrial fixed and mobile broadband application (4.25 similar to 4.76 GHz)/C-band WLAN (5.15 similar to 5.35/5.75 similar to 5.825 GHz-IEEE 802.11a] (5.4 similar to 5.9 GHz)/Lower X-band Earth exploration-satellite service ITU region 2 (7.9 similar to 8.4 GHz)/Upper X-band Amateur satellite operating band (10.45 similar to 10.50 GHz)/Lower Ku-band Radar communication application (13.25 similar to 13.75 GHz)/Middle Ku-band Geostationary satellite service (14.2 similar to 14.5 GHz) covering various wireless applications. Proposed design exhibit hexa/hepta band features during OFF/ON mode of PIN diode. An acceptable gain, stable radiation characteristics, and good impedance matching are observed at all the resonant frequencies of the proposed structure.

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