Multiband metamaterial antenna with omega shaped SRR structure for wireless communication
Loading...
Date
2016-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
Metamaterial as a special type of structure using natural electromagnetic material having EM properties can be very useful in different fields. It can play crucial role in communication field and can provide multiband characteristics with wider bandwidth and high gain as required in all field of RF communication on very small sized structures. The proposed antenna has been designed by using TLM equations that calculate the rectangular patch of size 40x40 mm2 having resonant frequency of 5 GHz and on the 1.58 mm height of substrate. The substrate material used is FR4 which is having a permittivity of 4.4 and loss tangent of 0.02. To enhance the performance, the rectangular patch has been changed to the circular patch that has radius of 7 mm at a substrate height of 1.58 mm and also size of the proposed antenna is reduced to 24.5x30mm2. The proposed antenna has a combination of conducting wire and omega shaped SRR structure to obtain metamaterial characteristics. The inter-digital structure of hexagon SRR has been used to achieve the negative permittivity and closed ring resonator to achieve the negative permeability and hence the combined structure can achieve the resonance in desired frequency band. The proposed antenna is simulated on HFSS software. Simulation results show that there are wide ranges of multi-bands from 1.4-7.6GHz, 9-11.4GHz, 11.6-15.25GHz and 15.5-17.6GHz and corresponding bandwidths are 6.2GHz, 2.4GHz, 3.65GHz and 2.1GHz respectively. The average gain of near 7.0 dB has been achieved. Proposed antenna is fabricated using lithography process. Its parameters have been tested on PNA. Radiation pattern is measured in an anechoic chamber. There is a good agreement between the simulated and fabricated results. The proposed antenna is reduced in size, having multiple bands with higher bandwidth as compare to previously fabricated antenna. The proposed antenna has application in Wi-MAX, WLAN, satellite communication, radar communication, space vehicles etc.
Description
Keywords
null