Without Rare Earth Elements, Electronic Warfare Systems Lose Their Edge

Key Takeaways

• Rare earth magnets power EW antenna steering and generators
• Dysprosium and terbium ensure magnet performance at high temperatures
• China supplies ~70% of global rare earth mining and processing
• EW market projected $20.8B by 2028, boosting rare earth demand
• Recycling and diffusion reduce heavy rare earth consumption in magnets

Pulse Analysis

The electromagnetic spectrum has evolved from a passive backdrop to a contested domain where electronic warfare (EW) determines tactical advantage. Central to this shift are rare‑earth magnets—primarily neodymium‑iron‑boron (NdFeB) and samarium‑cobalt (SmCo)—which deliver unparalleled torque density in compact antenna‑steering motors and high‑power generators. These magnets enable EW pods to track fast‑moving threats, power energy‑intensive transmitters, and sustain operation under extreme thermal loads, thanks to heavy‑rare‑earth additives like dysprosium and terbium that preserve magnetic strength at elevated temperatures.

Beyond the hardware, the rare‑earth supply chain presents a strategic vulnerability. China accounts for about 70% of global mining output and an even larger share of the critical separation and refining stages, creating exposure to geopolitical tensions, export restrictions, and capacity constraints. Defense programs must now factor material availability into acquisition schedules, employing long‑term contracts, stockpiling, and allied sourcing to mitigate risk. The concentration of processing capacity also amplifies environmental and regulatory challenges, prompting governments in the United States, Europe, and Japan to fund domestic production and recycling initiatives.

Looking ahead, the industry is pursuing multiple pathways to lessen dependence on scarce heavy rare earths. Grain‑boundary diffusion techniques strategically place dysprosium and terbium only where needed, cutting overall consumption while maintaining high‑temperature performance. Advanced coating technologies extend magnet lifespan, reducing replacement cycles. Parallelly, recycling programs target end‑of‑life electronics and manufacturing scrap to recover valuable rare earths, creating a secondary supply loop. These innovations, combined with policy support for diversified sourcing, aim to sustain the rapid growth of EW capabilities without compromising strategic resilience.