RF / Microwave Motors

Goal

Convert radio-frequency or microwave electromagnetic energy directly into mechanical motion.

Problem

Need for wireless power transmission to drive motors without conventional electrical wiring.

Concept Summary

The technology uses specially designed antennas, coils, and parametric resonant structures to capture RF or microwave energy and convert it into torque or linear force via electromagnetic induction, radiation pressure, or parametric excitation.

Principles

• Electromagnetic induction
• Parametric resonance
• Poynting vector radiation pressure
• Radiant energy conversion

Scientific Domains

Materials

• Copper wire
• Aluminum
• Dielectric ceramics
• Magnetic steel
• Antenna metal

Mechanisms of Action

• Interaction of RF fields with conductive coils to produce torque
• Parametric excitation of resonant structures by alternating fields
• Radiation pressure from microwave energy on antenna elements

Energy Sources

Applications

• Remote actuation of devices
• Spacecraft attitude control
• Industrial machinery without wiring

Limitations

• Low conversion efficiency
• Requires high-power RF source
• Limited torque output

Keywords

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