Application Cases

Antennas have always been the primary devices in signal transmission. Traditional long-wave antennas generate electromagnetic radiation through electrical resonance in metal structures, often requiring dimensions of hundreds or thousands of meters to meet operational frequency requirements, making installation and maintenance challenging. In contrast, mechanical antennas achieve electromagnetic radiation by using mechanical vibrations to flip internal electric or magnetic dipoles in materials, overcoming the limitations of structural size and radiation efficiency to enable the miniaturization of long-wave antennas. Currently, piezoelectric ceramic materials are widely used to achieve mechanical vibrations.

The Aigtek ATA-4000 series high-voltage power amplifier offers a maximum output voltage of 310 Vpp, a maximum output power of 547.1 W, and a bandwidth range of DC to 3 MHz, making it suitable for driving most piezoelectric ceramics on the market. It is also compatible with other scientific experiments requiring high-power AC voltage signals.

Experiment Name: Piezoelectric Mechanical Antenna Transmitter System Test

Experimental Principle:
When a power amplifier applies an AC voltage to both ends of a piezoelectric material, the inverse piezoelectric effect causes the piezoelectric material to undergo periodic axial expansion or contraction due to the alternating electric field. This mechanical deformation ultimately generates oscillating currents within the piezoelectric ceramic, radiating low-frequency electromagnetic waves outward.

Experimental Block Diagram:

Experimental Setup Image:

Experimental Procedure:
A signal generator outputs a continuous sinusoidal signal, which is amplified by the power amplifier to produce a high-voltage signal. The tip of a semiconductor feed probe is placed on the surface of the piezoelectric mechanical antenna, while the other end of the probe is connected to the amplifier output. An AC power source is applied to induce vibrations in the piezoelectric ceramic. A copper plate is placed under the mechanical antenna to ground the bottom electrode. It is important to note that even slight positional shifts of the piezoelectric ceramic during operation can affect vibrations and degrade the performance of the piezoelectric mechanical antenna.

Experimental Results:
The electrical signal output by the signal generator is amplified by the power amplifier to drive the vibration of the piezoelectric material, which emits acoustic signals. The acoustic signals are received within their respective frequency ranges using both a P5-H ferroelectric ceramic and a loop antenna (SAS-565L). By comparing the signal strengths received by the two materials, the radiation performance of each material can be evaluated to determine which is superior.

Application Areas: Industry, Communication Engineering, Transportation, Automotive

Application Scenarios: Geological exploration, underwater communication, transoceanic communication, etc.

Product Recommendation: ATA-4000 Series High-Voltage Power Amplifier

Figure: ATA-4000 Series High-Voltage Power Amplifier Specifications

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