ARLA/CLUSTER: Antena feita a partir de metal líquido

[João Costa > CT1FBF]

 Antenna made from liquid metal

The Register reports a liquid metal antenna can tune over a range of
at least two times greater than systems using electronic switches

Researchers at the North Carolina State University (NCSU) have
demonstrated a reconfigurable liquid-metal prototype in the Journal of
Applied Physics.

The paper, titled A reconfigurable liquid metal antenna driven by
electrochemically controlled capillarity describes "a new
electrochemical method for reversible, pump-free control of liquid
eutectic gallium and indium (EGaIn) in a capillary."

Antennas are interesting as the shape and length of the conducting
paths which form them determine their operating frequencies and
radiation patterns.

"Using a liquid metal – such as eutectic gallium and indium – that can
change its shape allows us to modify antenna properties more
dramatically than is possible with a fixed conductor," explained Jacob
Adams, co-author of the paper and an assistant professor in the
Department of Electrical and Computer Engineering at NCSU, in a press
release by the American Institute of Physics.

Read the full story at
http://www.theregister.co.uk/2015/05/20/
boffins_create_reconfigurable_liquid_metal_antenna/