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Dadgarpour, Abdolmehdi, Zarghooni, Behnam, Virdee, Bal Singh and Denidni, Tayeb A. (2014) Beam tilting antenna using integrated metamaterial loading. IEEE Transactions on Antennas and Propagation, 62 (5). pp. 2874-2879. ISSN 0018-926X
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10. Beam tilting antenna-edited.pdf - Accepted Version Download (1MB) | Preview |
Abstract / Description
This communication presents a technique to re-direct the radiation beam from a planar antenna in a specific direction with the inclusion of metamaterial loading. The beam-tilting approach described here uses the phenomenon based on phase change resulting from an EM wave entering a medium of different refractive index. The metamaterial H-shaped unit-cell structure is configured to provide a high refractive index which was used to implement beam tilting in a bow-tie antenna. The fabricated unit-cell was first characterized by measuring its S-parameters. Hence, a two dimensional array was constructed using the proposed unit-cell to create a region of high refractive index which was implemented in the vicinity bow-tie structure to realize beam-tilting. The simulation and experimental results show that the main beam of the antenna in the E-plane is tilted by 17 degrees with respect to the end-fire direction at 7.3, 7.5, and 7.7 GHz. Results also show unlike conventional beam-tilting antennas, no gain drop is observed when the beam is tilted; in fact there is a gain enhancement of 2.73 dB compared to the original bow-tie antenna at 7.5 GHz. The reflection-coefficient of the antenna remains < 10 dB in the frequency range of operation.
| Item Type: | Article |
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| Uncontrolled Keywords: | beam tilting, bow-tie antenna, metamaterial |
| Subjects: | 600 Technology > 620 Engineering & allied operations |
| Department: | School of Computing and Digital Media |
| Depositing User: | Bal Virdee |
| Date Deposited: | 22 Oct 2015 16:53 |
| Last Modified: | 21 Apr 2020 10:58 |
| URI: | https://repository.londonmet.ac.uk/id/eprint/805 |
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