A new type of pocket-sized antenna could enable mobile communication in situations where conventional radios don't work, such as underwater, through the ground and over very long distances through air.
from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2019/04/190412085213.htm
from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2019/04/190412085213.htm
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