Portable resonant multiferroic magnetoelectric antenna for ULF/VLF communication

US12424736B2 · kind B2 · utility

Assignee

• The Government of the United States of America, as represented by the Secretary of the Navy · US

Inventors

• Peter Finkel · Downingtown, US
• Margo Staruch · Alexandria, US
• Thomas Mion · Ellicott City, US
• Alex E. Moser · Washington, US

Key dates

• Filing date: Nov 2, 2023
• Grant date: Sep 23, 2025
• Expiry date: Mar 20, 2044

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01Q9/16
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

The present invention provides a magnetoelectric multiferroic, time-variable magnetic field transmitter based upon a resonant structure capable of enhancing the transmitted field at the structural resonant frequency. This transmitter utilizes a single crystal piezoelectric as the source of mechanical excitations with a laminated transduction element to reduce eddy currents in the magnetostrictive material thereby reducing losses at higher frequencies. The structural resonance frequency can be tuned by adjusting the size of the masses, position and strength of bias magnets, pre-stress conditions and physical parameters of the transduction column elements.