UNDERWATER COMMUNICATION METHOD Russian patent published in 2019 - IPC H04B13/02 

FIELD: radio engineering and communications.

SUBSTANCE: invention relates to radio engineering and can be used in communication systems using an antenna near-field field. For this purpose, the underwater communication method includes the following actions: the transmitted message is converted into an electrical signal, amplified, supplied to the antenna, a magnetic field is created in the near zone, which causes the EMF in the receiving antenna, and then converted with maximum likelihood or other criterion into initial message, provides maximum current in transmitting antenna by introducing it into resonance at operating frequency using series-connected capacitor followed by transforming impedance of antenna circuit to output resistance of transmitter, and on the receiving side the same or another frame antenna is used, which is tuned to resonance and matched with the receiver by means of an active amplifier element with high input resistance or using a communication coil.

EFFECT: broader functional capabilities owing to communication in an air-water combined medium and simplified communication.

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