Circular beam-steering reconfigurable antenna with liquid metal parasitics
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Document typeArticle
Defense date2012-04
Rights accessRestricted access - publisher's policy
Except where otherwise noted, content on this work
is licensed under a Creative Commons license
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Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
A novel antenna reconfiguration mechanism based on
the displacement of liquid metal sections is presented. The liquid
nature of the moving parts of the antenna helps avoid the main
disadvantage of mechanically-actuated reconfigurable antennas
which is the mechanical failure of their solid parts due to material
fatigue, creep or wear. Furthermore, the displacement of liquid
elements can be more effectively performed than in the case of
solid materials by applying precise microfluidic techniques such
as continuous-flow pumping or electrowetting. The reconfiguration
mechanism is demonstrated through the design, fabrication
and measurement of a radiation pattern reconfigurable antenna.
This antenna operates at 1800 MHz with 4.0% bandwidth and
is capable of performing beam-steering over a 360 range with
fine tuning. The antenna is a novel circular Yagi-Uda array,
where the movable parasitic director and reflector elements are
implemented by liquid metal mercury (Hg). The parasitics are
placed and rotated in a circular microfluidic channel around the
driven element by means of a flow generated and controlled by a
piezoelectric micropump. The measured results demonstrate good
performance and the applicability of the microfluidic system.
CitationRodrigo, D.; Jofre, L.; Cetiner, B. Circular beam-steering reconfigurable antenna with liquid metal parasitics. "IEEE transactions on antennas and propagation", Abril 2012, vol. 60, núm. 4, p. 1796-1802.
ISSN0018-926X
Publisher versionhttp://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6144717
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