Extremely Low Frequency (ELF) Acoustics Promoted Antenna for Submarine Applications

An extremely low frequency (ELF) bulk acoustic-wave (BAW)-mediated multiferroic-antenna is presented, and its extremely low operating frequency allows it to be used for submarines, while its size is reduced by 3–4 orders of magnitude compared to general wire antennas. This BAW ELF antenna is mainly composed of piezoelectric and magneto strictive materials. After tested by COMSOL simulation platform, the operating frequency of this antenna is around 1.75kHz, which meets the demand of extremely low frequency e, the length and width of the antenna is controlled to around 1m, which is convenient for submarine to carry.

I. Introduction

Extremely-low-frequency (ELF) electromagnetic waves at 30-3kHz, are often used in military equipment and submarine communications [1], and ELF has wavelength of 10,000km-100,000km, which enables it to diffract around large obstacles without being blocked by them [2].