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

Content Provider	IET Digital Library
Author	Vourch, Clement J. Drysdale, Timothy D.
Abstract	The authors present a new approach to designing V-band Bull's eye antennas 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 they explain in terms of the coupling angle to free space and surface waves. They 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. They 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. They 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. Their 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 18.1 dBi.
Starting Page	318
Ending Page	325
Page Count	8
ISSN	17518725
Volume Number	10
e-ISSN	17518733
Issue Number	Issue 3, Feb (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/10/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2015.0425
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2016-02-19
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Antenna Array Antenna Radiation Pattern Antenna Theory Aperture Antenna Asymmetrical Shifts Beam Deflection Multiple Discretely Steerable Beam Single Antenna Six-sector Ring Pattern Subwavelength Aperture Symmetrical Shift V-band Bull's Eye Antenna
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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