Liquid Metal Antenna
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.
Published in a paper titled by the university, they describe how a reconfigurable liquid metal antenna driven by electrochemically controlled capillarity is 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.