Beam-Tilting Antenna With Negative Refractive Index Metamaterial Loading
Authors:
- Jinxin LiJLJinxin Li
- Qingsheng ZengQZQingsheng Zeng
- Ruizhi LiuRLRuizhi Liu
- Tayeb Ahmed DenidniTDTayeb Ahmed Denidni
- 14 April 2017
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Antennas and Wireless Propagation Letters
- Vol. 16 (15361225) , 2030-2033
Abstract
A beam-tilting antenna with negative refractive index metamaterial (NRIM) loading is proposed for WLAN applications. The proposed antenna is composed of a double-feed dielectric resonator antenna (DRA) and 1×4 NRIM array which are fixed over and in the middle of the DRA. The proposed NRIM unit-cell comprises of a fractal cross ring resonator structure and performs a negative refractive index in the band from 5 to 5.5 GHz. When the electromagnetic (EM) waves enter a medium with a negative refractive index, the direction of propagation of the EM wave can be changed. Therefore, beam-tilting can be implemented by using the DRA cooperating with the proposed NRIM array. The simulation and experimental results show that the beam-tilting antenna can steer the main beam by ±38o in the xoz-plane over 5-5.5 GHz band. The reflection coefficient of the antenna is better than -10 dB in the band from 5 to 5.5 GHz. Furthermore, the measured results have a good agreement with simulated ones.Keywords
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