Magneto-electro-mechanical coupling type miniaturized very-low-frequency mechanical antenna

Abstract

The invention provides a magneto-electro-mechanical coupling type miniaturized very-low-frequency mechanical antenna. The magneto-electro-mechanical coupling type miniaturized very-low-frequency mechanical antenna comprises magnetostrictive materials, a piezoelectric material, block-shaped permanent magnets, a reverse lead screw, an adjusting base, a sliding block, a central support and a guide rod, wherein the piezoelectric material is bonded between the magnetostrictive materials through epoxy glue to form an antenna of a three-layer structure including a magnetostrictive material layer, a piezoelectric material layer and a magnetostrictive material layer; and the pair of block-shaped permanent magnets are arranged on the adjusting base and located on the front and rear sides of the antenna respectively. The antenna is based on a magneto-electro-mechanical coupling effect, the piezoelectric layer generates a piezoelectric effect under excitation applied by the electrodes to generatevibration, the upper magnetostrictive layer and the lower magnetostrictive layer are driven to vibrate, change of magnetization intensity in the magnetostrictive layers is caused under the condition of an adjustable bias magnetic field, and electromagnetic waves are excited in a surrounding free space, so that emission of signals meeting different requirements is realized. Radiation signals of theantenna can reach a very low frequency range, and the antenna has the advantages of miniaturization, portability and adjustable resonance frequency.

Description

technical field [0001] The invention belongs to the technical field of very low frequency communication, in particular to a magnetic electromechanical coupling miniaturized very low frequency mechanical antenna. Background technique [0002] Mechanical antenna is a new low-frequency electromagnetic signaling technology. Unlike traditional antennas, mechanical antennas do not rely on the oscillating current of electronic circuits to generate radiation, but drive the movement of charges or magnetic dipoles through mechanical energy, which is then converted into electromagnetic energy. produce a radiation field. This technology can make the near-field energy that is difficult to use by traditional antennas play a role in antenna radiation, without the need for a huge impedance matching network, and the penetration is improved, which has significant advantages in underground communication and underwater communication. [0003] In the very low frequency ULF: 300Hz-3kHz band, ele...

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Problems solved by technology

[0003] In the very low frequency ULF: 300Hz-3kHz band, electromagnetic waves mainly have many technical advantages such as strong anti-interference ability and good penetration. However, due to its long signal wavelength, in order to achieve effective electromagnetic radiation, the existing very low frequency transmission system Bulky and electrically small antenna with limited radiation efficiency

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