Metamaterial based compact super wide band microstrip antenna with DGS for wireless applications
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Date
2018-08
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
Wireless communication is undergoing through enormous advancement in terms of technology in the last decades for increased data rate in a broad range of frequency spectrum. In recent years, for long-range transmission super wide band technology, is extensively used. As per IEEE 802.11 standards wireless local area network (WLAN) operates in 4.9 GHz band (4.94-4.99 GHz), worldwide interoperability for microwave access (Wi-MAX) operates in 5 GHz band (5.1-5.8 GHz) and higher bands for satellite communication & vehicle recognition application (8-14GHz). The development of metamaterial based super wide-band microstrip antenna with DGS for wireless applications is proposed. The proposed antenna is designed for the resonant frequency at 5.8 GHz, using HFSS Software. The proposed work uses FR-4 substrate with permittivity 4.4, loss tangent 0.02 and thickness 1.6 mm. The circularly slotted patch structure, defected & slotted ground structure with SRR is designed. The circularly and strip slotted patch structure is used for proper impedance matching whereas defected and rectangular slotted ground plane with SRR are mainly used for compactness and enhancing the impedance bandwidth. The overall dimension of the antenna is 24 x 18 x 1.6 mm3.The simulated impedance bandwidth is observed as 11.1 GHz in the frequency range from 4.09 to 15.19 GHz and a maximum peak gain is found to be 1.9 to 6.5 dB. The simulated radiation patterns in E & H plane at different frequencies are drawn. The simulated & proposed antenna is fabricated and measured for reflection coefficient and VSWR. The measured impedance bandwidth is obtained at 10.9 GHz in the frequency range from 4.6 to 15.5 GHz. The simulated and measured results are in good agreement. The results for the proposed antenna are also compared to that for the previously designed antennas and therefore, it is concluded that the proposed antenna is compact in size and super wide band.
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