Application Cases

Experiment Name: Application of Power Amplifiers in Magneto-Mechanical-Electric Coupling Very Low Frequency Mechanical Antennas

Experimental Content:
A very low frequency magneto-mechanical-electric mechanical antenna was designed and fabricated based on the magneto-mechanical-electric coupling effect. By using piezoelectric materials to induce deformation in magnetostrictive materials and generate oscillations in permanent magnets, electromagnetic waves are radiated into the environment. This method overcomes the limitations of traditional current-element antennas, where the wavelength of emitted electromagnetic waves is constrained by the size of the antenna device, thereby broadening the scientific design and fabrication of miniaturized very low frequency antennas.

Research Direction: Design of Magneto-Electric Very Low Frequency Mechanical Antennas

Testing Equipment:
Signal generator, ATA-3090B power amplifier, magneto-mechanical-electric mechanical antenna, receiving coil, dynamic signal analyzer, oscilloscope

Experimental Procedure:
An analog audio signal generated by a signal generator was amplified using the ATA-3090B power amplifier and then fed into the magneto-mechanical-electric mechanical antenna, where it was converted into an electromagnetic wave signal. A receiving coil captured the electromagnetic wave signal, which was then processed by the ATA-3090 power amplifier and input into an oscilloscope, allowing observation of the restored analog audio signal. If the amplified received signal was directly input into a speaker, the original audio could be played back.

Experimental Results:
The experiment used an analog audio signal containing the voice message "This is a magneto-electric antenna." The voltage analog signal converted from the audio was amplified and input into both the magneto-mechanical-electric coupling antenna and a loop antenna to generate electromagnetic wave radiation. The analog signal received from the magneto-mechanical-electric coupling antenna exhibited lower background noise, higher fidelity, and was closer to the original voice voltage analog signal compared to the signal from the loop antenna. Additionally, the received signal, after amplification, could be directly input into a speaker to play back the original voice.

Figure: Specifications of the ATA-3090C Power Amplifier