Aerosolized MagnetoElectric Mechanical Antenna (AMEMA)


Aerosolized MagnetoElectric Mechanical Antenna (AMEMA) is a radical concept for reducing the size of VLF transmitter by five orders of magnitude - without bulk motion. By leveraging the breakthrough's made at Virginia Tech in developing mathematical models for time-variant system, non-resonant radiating structures and tuning electronics, and combining them with novel "spin modulation (SM)" and electrically-tunable permeability in a new class of magnetoelectrics, AMEMA is expected to meet defense and commercial size, weight, power, and transmit requirements. The proposed antenna's radiating structure is a cylindrical core with symmetrical quadrants. Each quadrant consists of laminated composite with three layers: Neodymium-Boron based permanent magnet, piezoelectric layer, and soft magnetic layer. The combination of piezoelectric and soft magnetic layer is termed "magnetoelectric." On applying electric field to the piezoelectric layer, the relative permeability of the soft magnetic layer can be changed from a higher value (e.g., 20) to 1, thereby radiating the flux out of the core. Thus, as the alternating electric field is applied to the piezoelectric layer across the quadrants, the radiating flux can be rotated clockwise (CW) or counter-clockwise (CCW) at the desired frequency. Such transient-free, inertia-less "spin modulation" is coupled with "transient-state" concept to push the data rate toward the transmission frequency.

Patent Information:
For Information, Contact:
Grant Brewer
Senior Licensing Associate
Virginia Tech Intellectual Properties, Inc.
(540) 443-9218
Khai Ngo
Shashank Priya
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