Patent ID: 11942681
Assignee: HRL LABORATORIES, LLC
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A system for subsurface transmission comprising:
an array of satellite nodes arranged in a plane substantially parallel to a surface of a body of water, each satellite node comprising:
a pair of satellites, each pair of satellites comprising:
a tether between the pair of satellites;
a dipole antenna placed along the tether and oriented parallel to the body of water;
a controller;
a VLF transmitter coupled to the dipole antenna and to the controller;
a data buffer coupled to the controller;
a navigation subsystem coupled to the controller; and
a communications transceiver coupled to the controller;

wherein each satellite node is positioned less than one wavelength of a desired very low frequency from another satellite node;
wherein data to be transmitted is received by the communications transceiver in each satellite node and stored in the data buffer in each satellite node;
wherein each respective satellite node transmits the data in the data buffer of the respective node with phasing or timing to enhance radiation in a direction towards the body of water and to suppress radiation in other directions; and
wherein all the satellite nodes begin transmission of data in the data buffer at substantially the same time with substantially the same phase.