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V-band Bull's eye antenna for multiple discretely steerable beams

Vourch, Clement J. and Drysdale, Timothy D. (2016). V-band Bull's eye antenna for multiple discretely steerable beams. IET Microwaves, Antennas & Propagation, 10(3) pp. 318–325.

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We present a new approach to designing V-band Bull’s eye antenna so as to produce multiple beams, which are either fixed or discretely steerable. Bull’s eye antennas comprise concentric rings around a subwavelength aperture. Beam deflection is accomplished by adjusting the effective spacing of the rings, which we explain in terms of the coupling angle to free space and surface waves. We show that multiple beams can be obtained from a single antenna, with the deflection of each beam being controlled independently by the relevant portion of the ring pattern. We demonstrate the principle through rigorous full-wave simulations of two-beam antennas with symmetrical and asymmetrical shifts, and give experimental results for a prototype milled in aluminium, with two separate fixed beams each deflected 16° to either side of the broadside. We also propose means to obtain up to six different beam arrangements during operation by mechanically rotating a plate containing a special six-sector ring pattern. Our simulated example gives three patterns, a single broadside beam or two beams each deflected by 8° or 15°. The radiation efficiency
of the antenna is 97%, and the gain of a single undeflected beam is 18.1dBi.

Item Type: Journal Item
Copyright Holders: 2016 Institution of Engineering and Technology
ISSN: 1751-8733
Keywords: aperture antennas; antenna arrays; antenna; radiation patterns; symmetrical shifts; six-sector ring pattern; subwavelength aperture; V-band Bull's eye antenna; beam deflection; multiple discretely steerable beams; single antenna; asymmetrical shifts
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 46088
Depositing User: Timothy Drysdale
Date Deposited: 18 Apr 2016 14:29
Last Modified: 11 Sep 2018 08:42
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