MEMS‐Based Magnetoelectric Antennas for Wireless Power Transmission in Brain‐Implantable Devices

Abstract Wirelessly powered brain‐implantable devices are emerging as promising approaches for treating neural disorders through the precise recording and stimulation of neuronal activity. Magnetoelectric (ME) antennas hold substantial potential for addressing the fundamental trade‐off between size and resonant frequency in implantable antennas, as they transduce magnetic waves into acoustic resonance at their intrinsic structural frequency. This allows the ME antenna to achieve a microscale size at low operating frequencies while maintaining high power transfer efficiency, robust misalignment tolerance, and minimal tissue attenuation, thereby overcoming the limitations of conventional near‐field and far‐field wireless power transfer. Furthermore, ME‐antenna‐based energy harvesting systems enable seamless integration with complementary circuits, facilitate fully integrated designs at the system level with compact size and low power consumption. This review presents the primary building blocks, design principles, and performance parameters of ME‐antenna‐based power links for neural interfacing, outlining a vision toward minimally invasive and reliable next‐generation self‐powered wireless brain implantable devices.