Application Cases

In today's society, the demand for portable, miniaturized, and efficient communication devices is continuously increasing. Traditional electric antennas operate based on the principle of electromagnetic wave resonance, which is limited by wavelength at low frequencies, resulting in large antenna sizes and bulky supporting equipment. This significantly hampers the efficiency of low-frequency communication systems. Therefore, new types of electromagnetic antennas are being researched and promoted. These new antennas enhance communication efficiency and reduce the size of communication devices by adding the magnetostrictive effect to the traditional electric antennas for sensing electromagnetic waves.

Regarding experimental research on low-frequency magnetostriction, the ATA-3000 series power amplifiers from Aigtek are widely used in this field. They can output up to 20 A of alternating current, which is sufficient to drive most magnetostrictive transmitters.

Experiment Name: Low-Frequency Communication Testing of Longitudinally Resonant Magneto-Electric Antennas

Experiment Principle:

The electromagnetic antenna is composed of alternating layers of piezoelectric ceramics and inductive materials. The high performance of the antenna device is determined by the positive and negative magneto-electric effects between the composite materials. These effects can be considered as the product of the magnetostrictive effect of the inductive material and the piezoelectric effect of the piezoelectric material. By applying electrical power or stress to the material, energy conversion between magnetic, mechanical, and electrical domains can be achieved.

Experimental Block Diagram:

Experimental Process:

First, the sinusoidal signal for system excitation is generated by a signal generator. It is then amplified by the ATA-2022B power amplifier from Aigtek. The amplified signal is output to the transmitting antenna, where it, in conjunction with the magnetic field, enables the emission of very low-frequency electromagnetic waves. After the receiving antenna captures the feedback signal, it is amplified by a preamplifier and filtered by a filter. The filtered signal is recorded by an oscilloscope and fed back to a computer, completing the communication of the signal.

Application Directions:

• Concrete inspection

• Bridge metal detection

• Electromagnetic communication

• Low-frequency communication

• Wireless communication

Application Scenarios:

• Magneto-electric antennas

• Magneto-electric effects

• Wireless energy transfer

• Magnetic field charging

Product Recommendation:

Figure: Performance Parameters of the ATA-3000 Series Power Amplifiers

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