期刊
ADVANCED COMPOSITES AND HYBRID MATERIALS
卷 5, 期 1, 页码 410-418出版社
SPRINGERNATURE
DOI: 10.1007/s42114-022-00431-4
关键词
Piezoelectric; Artificial structure; Very low frequency; Mechanical antenna
资金
- Fundamental Research Funds for the Central Universities [2021XDA06-1]
- National Natural Science Foundation of China [51972033, 61905021, 61976025, 51802023, 51802021]
- Beijing Youth Top-Notch Talent Support Program
- Key Area Research Plan of Guangdong [2019B010937001]
- Science and Technology Plan of Shenzhen City [JCYJ20180306173235924, JCYJ20180305164708625]
This study demonstrates a compact dual-band mechanical antenna for enhancing electromagnetic radiation. The mechanical antenna, consisting of piezoelectric ceramic rings, has been experimentally shown to have radiation enhancement within the VLF range. It has great potential for applications in portable, low-cost, and high-performance VLF wireless communication devices.
Very low frequency (VLF) (3-30 kHz) communication systems are widely used in remote and underwater scenarios due to the low propagation loss. However, the antenna size and complex impedance matching network restrict the development of portable VLF transmitters. Here, we demonstrate a compact dual-band piezoelectric artificial structure for very low frequency mechanical antenna for the enhancement of electromagnetic radiation. The mechanical antenna consisted of piezoelectric ceramic rings operating at 25.61 kHz and 35.79 kHz. A VLF communication system is designed to verify the radiation efficiency of the proposed mechanical antenna. At 25.61 kHz and 35.79 kHz, the measured magnetic field intensity can reach 0.118 nT and 0.084 nT at a distance of 5.4 m. Due to the piezoelectric artificial structure, the radiation enhancement of the proposed antenna has been experimentally demonstrated within the range of 20-10 kHz. This mechanical antenna has great potential in applications of portable, low-cost, and high-performance VLF wireless communication devices.
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