The Long Range Subsurface Communication System

Discussed herein is a point-to-point communication system for ranges in the order of hundreds of miles where the transmitting and receiving equipment, including radiating devices, can be buried deep underground. Results of theoretical analyses and subsequent experimental verifications of various aspects of the communication system have been presented in this paper. Problems on the optimization of system parameters for different geo-electromagnetic conditions of the ground, noise environment, and for various system constraints are discussed. Also presented in the paper are the solutions of some of the above problems suitable for engineering uses.