Self-resonant array antenna for through-the-earth communication and antenna unit

Abstract

The invention relates to a self-resonant array antenna for through-the-earth communication and an antenna unit. The array antenna comprises at least two antenna units; each antenna unit includes an alternating-current loop and an excitation loop; the alternating-current loop comprises a coil which is formed by at least one turn of electric conduction body and a capacitor module which is connected between two ends of the electric conduction body; the excitation loop comprises an electric conduction ring, wherein the electric conduction ring has an open end which is used for connecting a signal transmitting or receiving port of a communication system; the alternating-current loop and the excitation loop in the same antenna unit are in insulation and electromagnetic field coupling with each other; and the open ends of the excitation loops of the antenna units are in series connection, in parallel connection or in series-parallel connection. With the self-resonant array antenna of the invention adopted, the ability of the through-the-earth communication system to receive weak signals can be significantly improved, and therefore, the problem of short through-the-earth communication transmission distance can be solved.

Description

technical field

[0001] The invention relates to the field of through-the-earth communication, in particular to a self-resonant array antenna and an antenna unit as a main component of the array antenna. Background technique

[0002] When a mine disaster occurs, the conventional wired communication system is usually destroyed. The interruption of communication between the underground and the ground directly leads to the inability of the survivors trapped in the underground to get in touch with the ground personnel or ambulance personnel, which brings great difficulties to timely and effective organization of rescue. .

[0003] The formation of the mine is mainly composed of a multi-layer structure composed of sedimentary rocks. Each layer belongs to a different layer system. Each layer system has several mineral layers and surrounding rocks, which makes the transmission conditions of wireless signals in the formation very complicated. However, the earth channel is relatively...

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