Low-frequency miniaturized electromagnetic-acoustic radiator and preparation method thereof

• Main Authors: ZI GUOHAO, YUAN WEIZHENG, WANG YINAN, MA ZHIBO
• Format: Patent
• Language: Chinese; English
• Published: 25.07.2023
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; ELECTRICITY

The invention discloses a low-frequency miniaturized electromagnetic-acoustic radiator and a preparation method thereof, and belongs to the technical field of communication, and the electromagnetic-acoustic radiator sequentially comprises an upper magnet, an upper magnetostriction sheet, an upper electrode, a C-axis polarized piezoelectric layer, a lower electrode, a lower magnetostriction sheet and a lower magnet from top to bottom, and different layers are bonded by epoxy resin glue. The upper-layer electrode and the lower-layer electrode are interdigital electrodes, and the upper-layer magnet and the lower-layer magnet are used for clamping the magnetostriction sheet-piezoelectric layer composite layer so as to improve the stress transfer coefficient. An excitation signal is input from the interdigital electrode, the piezoelectric layer is excited to vibrate, sound wave radiation is generated, meanwhile, vibration of the piezoelectric layer is transmitted to the magnetostriction piece, and the magnetostric