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Underwater communications system

  • US 7,873,316 B2
  • Filed: 03/01/2010
  • Issued: 01/18/2011
  • Est. Priority Date: 06/15/2005
  • Status: Expired due to Fees
First Claim
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1. An underwater communications system comprising:

  • a transmitter which transmits electromagnetic signals to a remote receiver said transmitter comprising a data input;

    a modulator for modulating the data onto a carrier signal; and

    an electric field coupled antenna for transmitting the modulated signals,wherein at least one of said transmitter and said remote receiver is underwatersaid transmitter and said receiver being operable to communicate within a near field of said electromagnetic signals, said near field of said electromagnetic signals corresponding to the region around said transmitter where at least one of inverse distance squared (1/r2) and inverse distance cubed (1/r3) field components of said electromagnetic signals is greater than an inverse distance (1/r) field component thereof.

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