自偏磁电天线用于非常低频通信:利用磁化分级和不对称结构诱导的共振
Chung Ming Leung1, Haoran Zheng1, Jing Yang2
1School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China.
Sensors (Basel, Switzerland)
|January 26, 2024
概括
本研究介绍了一种自偏磁电 (ME) 天线,用于紧的非常低频 (VLF) 通信. 这种新的设计提高了VLF系统的便携性和效率.
科学领域:
- 电磁学 电磁学 电磁学 电磁学
- 材料科学 材料科学 材料科学
- 无线通信无线通信
背景情况:
- 磁电 (ME) 天线具有紧的尺寸和高辐射效率.
- 由于需要大型直流磁偏差场,因此阻碍了VLF ME天线的小型化.
- 现有的VLF系统面临着便携性和尺寸方面的挑战.
研究的目的:
- 为微型VLF通信系统引入自我偏向的ME天线设计.
- 探索一个不对称的,自我偏差的ME天线的操作原理和性能.
- 为了展示开发的VLF天线的通信能力.
主要方法:
- 使用两个磁铁材料开发了一个不对称的天线设计,以诱导磁化分级效应.
- 通过曲来降低共振频率,这是由于不对称的设计所促进的.
- 包括辐射机制,强度和驱动功率在内的性能参数被实验评估.
- 一个定制的调制-解调回路被用来验证与2ASK和2PSK调制的通信.
主要成果:
- 自偏的ME天线由于其直接和反向磁电效应,证明了其作为发射器和接收器的有效运行.
- 在2.09 mW的驱动功率和24.47 kHz,天线实现了磁流密度为2.44 pT在3米.
- 用2ASK和2PSK调制对10Hz和100Hz的基带信号进行了通信能力验证.
结论:
- 开发的自偏向ME天线为轻量级和紧的VLF通信系统提供了实用解决方案.
- 不对称的设计和磁化分级效应有效地降低了共振频率,并消除了对外部偏差的需求.
- 这项技术有可能推进便携式VLF通信设备.
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