Seawater antenna

SSC Pacific has developed a technology that uses the magnetic induction properties of sodium chloride (salt) in seawater to transmit and receive communication signals. The device works by pumping a stream of seawater through a current probe.

The height of the seawater stream determines the antenna’s frequency. For example, UHF frequencies require a 2-foot high stream of water, while VHF and HF frequencies require 6-foot and 80-foot high streams (respectively). The width of the stream determines the antenna’s bandwidth.

The antenna requires a relatively small footprint and can be modified to accommodate multiple frequencies and bandwidths by stacking current probes and adding additional spray nozzles. The technology could be used on land with salt-supplemented water, replacing large unsightly antenna towers with fountains.

The device could also be used on land or sea as a solar- or battery-powered emergency antenna system.

4 comments for “Seawater antenna

  1. dearieme
    August 26, 2012 at 09:51

    Oh no – it’ll empty the aquifers.

  2. August 26, 2012 at 10:20

    I wonder how they discovered this? Some guy swimming on his back and listening to the radio I suppose.

  3. ivan
    August 26, 2012 at 10:24

    Another idea in the class of ‘it works in the lab, just don’t take it out into the real world’.

    I would hate to have to rely on that thing in a howling gale and lashing rain. the resonant frequency would be all over the place and loading would be a complete nightmare – in other words it wouldn’t work at the time it would most likely be needed.

    Verdict – fail.

  4. August 26, 2012 at 20:08

    My friend was saying that subs use the technique already and that when there is little other choice, … it is an actual choice. Maybe it won’t be a runaway commercial success but it still might find a place.

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