Application Cases

Experiment Title: Factors Affecting Magneto-Electric Antennas

Testing Equipment: ATA-2022B High Voltage Amplifier, Signal Generator, Oscilloscope, etc.

Figure 1: Topology of the Magneto-Electric Antenna Communication System

Experiment Process:

Figure 2: Prototype of the Magneto-Electric Antenna Communication System (a) Double-Layer Magneto-Electric Composite Structure (b) Transmitter (c) Receiver (d) Indoor Testing

Based on the topology of the magneto-electric antenna communication system shown in Figure 1, the prototype of the communication system shown in Figure 2 was constructed. The specific implementation principle of the communication test is to input the excitation electrical signal from the signal generator into the high voltage amplifier, which then voltage-excites the magneto-electric composite structure to generate very low frequency (VLF) electromagnetic waves. The VLF electromagnetic waves are received by the magnetic ring receiving coil, and the signal is transmitted and processed by the oscilloscope to obtain the VLF signal, thus completing the communication.

Based on the electromagnetic induction effect, within the close-range induction field radiation range, the signal is received by the magnetic ring receiving antenna. The input frequency of the signal generator is set to the very low frequency range of 3kHz-30kHz to sweep the frequency of the transmitting antenna. The time-varying magnetic field signal is analyzed, and the experimental results are shown in Figure 3.

Figure 3: Frequency Sweep of the Magneto-Electric Antenna

The analysis shows that compared to the first-order longitudinal resonance frequency, the amplitude (vertical coordinate) after FFT transformation at the first-order bending resonance frequency is only 1% different, but the corresponding frequency (horizontal coordinate) is only about 25% of the first-order longitudinal resonance frequency. This also demonstrates the advantage of the first-order bending resonance mode in terms of low frequency and high efficiency compared to longitudinal resonance in an asymmetric double-layer structure.

High Voltage Amplifier Recommendation: ATA-2022B

Figure: Specifications of the ATA-2022B High Voltage Amplifier

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