Ultra-low frequency mechanical antenna array with modulatable phase amplitude

Abstract

The invention discloses an ultra-low frequency mechanical antenna array with an adjustable phase amplitude, and belongs to the technical field of ultra-low frequency wireless communication. The arraycomprises an ultra-low frequency magnetic field generation module and an ultra-low frequency magnetic field control module, the ultra-low-frequency magnetic field generation module generates a staticmagnetic field; the ultra-low frequency control module generates a static magnetic field periodic change by controlling the ultra-low frequency magnetic field generation module so as to generate an amplitude and phase modulatable time-varying magnetic field, the ultra-low frequency control module comprises a motor controller and an upper computer, and the upper computer communicates with the motorcontroller according to the phase and amplitude of the magnetic field to be modulated. Compared with the existing mechanical antenna, the permanent magnet is used for generating a static magnetic field, the motor drives the soft magnetic material turntable to rotate to form an alternating magnetic field in a multiple relationship with the working frequency of the motor, the power consumption andthe mechanical structure design difficulty are reduced, and the amplitude and phase of the generated ultra-low frequency electromagnetic wave are modulated by controlling the start and stop of the mechanical antenna array element and the relative position of the turntable during rotation.

Description

technical field [0001] The invention relates to ultra-low frequency wireless communication technology, in particular to an ultra-low frequency mechanical antenna array whose phase amplitude can be modulated. Background technique [0002] Ultra-low frequency (ULF) refers to electromagnetic waves with a frequency of 0.3-3Khz. Ultra-low frequency (ULF) electromagnetic waves are of great value in both commercial and military applications. Their outstanding advantage is that they can penetrate conductive materials such as water, soil, and rocks. The attenuation is small, and it has obvious advantages in ground-penetrating communication, underground communication, and underwater communication. The traditional antenna forms a changing electric field by driving the movement of electrons in the antenna conductor, and then induces a changing magnetic field. The working frequency determines the geometric size of the antenna, and the length of the antenna is usually required to be a qua...

AI Technical Summary

Problems solved by technology

[0006] (2) For a mechanical antenna with a single permanent magnet rotation, the electromagnetic wave amplitude and phase cannot be modulated

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