Affiliation:
1. School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China
2. Institute for Advanced Study Shenzhen University Shenzhen 518061 China
3. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, School of Electronic Science and Engineering Xi'an Jiaotong University Xi'an 710049 China
4. State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China
Abstract
AbstractExtremely low‐frequency (ELF) electromagnetic (EM) waves adeptly propagate in harsh cross‐medium environments, overcoming rapid decay that hinders high‐frequency counterparts. Traditional antennas, however, encounter challenges concerning size, efficiency, and power. Here, drawing inspiration from nature, we present a groundbreaking piezo‐actuated, bionic flapping‐wing magnetic‐dipole resonator (BFW‐MDR), operating in the electro‐mechano‐magnetic coupling mechanism, designed for efficient ELF EM wave transmission. The unique rigid‐flexible hybrid flapping‐wing structure magnifies rotation angles of anti‐phase magnetic dipoles by tenfold, leading to constructive superposition of emitted magnetic fields. Consequently, the BFW‐MDR exhibits a remarkable quality factor of 288 and an enhanced magnetic field emission of 514 fT at 100 meters with only 6.9 mW power consumption, surpassing traditional coil antennas by three orders of magnitude. The communication rate is doubled by the ASK+PSK modulation method. Its robust performance in cross‐medium communication, even amidst various interferences, underscores its potential as a highly efficient antenna for underwater and underground applications.
Funder
National Natural Science Foundation of China