Beam-Deflection Using Gradient Refractive-Index Media for 60-GHz End-Fire Antenna

Dadgarpour, Abdolmehdi and Zarghooni, Behnam and Virdee, Bal Singh and Denidni, Tayeb A. (2015) Beam-Deflection Using Gradient Refractive-Index Media for 60-GHz End-Fire Antenna. IEEE Transactions on Antennas and Propagation, 63 (8). pp. 3768-3774. ISSN 0018-926X

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Official URL: http://dx.doi.org/10.1109/TAP.2015.2438396

Abstract

This communication describes a beam-tilting technique for planar dipole antennas utilizing gradient refractive-index metamaterial (GRIM) unit-cells. Beam-deflection mechanism is based on the phase shift phenomena resulting from the interaction of the EM waves with media of different refractive-indices implemented using GRIM unit-cells. The GRIM unit-cell comprises of a stub-loaded I-shaped resonant structure that is directly integrated onto the dipole antenna. The simulation and experimental results show that an antenna with a 5 × 4 array of GRIM unit-cells can steer the main beam in the E-plane by +26° with respect to the end-fire direction over 57-64 GHz. The antenna exhibits 4-dB gain enhancement and S11 better than -10 dB from 57-64 GHz. It is also shown that a quad-feed dipole antenna with GRIM arrays can deflect the beam by ±56°.

Item Type: Article
Uncontrolled Keywords: metamaterials, beam steering, dipole antenna, millimeter-wave
Subjects: 600 Technology > 620 Engineering & allied operations
Department: School of Computing and Digital Media
Related URLs:
Depositing User: Bal Virdee
Date Deposited: 21 Oct 2015 08:50
Last Modified: 12 Jul 2017 11:44
URI: http://repository.londonmet.ac.uk/id/eprint/790

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