New publications, experiments and breakthroughs in information technology–and what they mean.
Tuning in: Silvery wires of a liquid-metal alloy, encased in a polymer, form an antenna that still works after being twisted.
Adaptable Antenna
Injecting liquid metal into polymer molds produces efficient antennas that can twist and stretch
Source: “Reversibly Deformable and Mechanically Tunable Fluidic Antennas”
Michael D. Dickey et al.
Advanced Functional Materials 19: 3632-3637
Results: Engineers at North Carolina State University created a flexible yet efficient antenna using a liquid metal, a gallium-indium alloy. The antenna is as efficient as a standard copper antenna, transmitting over a broad frequency range at about 90 percent efficiency. It remains functional even when it is twisted, folded, or stretched to 40 percent beyond its normal length.
Why it matters: The antenna could make it easier to send and receive data from flexible electronics, such as sensors incorporated into clothing, electronic paper, or implantable biomedical devices. The radio frequencies it responds to change as it stretches, which means that it could be embedded in machinery or in a concrete structure such as a bridge to monitor it for strain over time. Read more
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