In the modern aerospace and defense sectors, stealth technology is crucial for aircraft survivability. Current methods primarily rely on shaping, radar-absorbing coatings, and electronic jamming to evade detection. However, these techniques face substantial limitations: they are often narrowband, bulky, and vulnerable to sophisticated radar systems that can distinguish stealth aircraft, especially when targets are moving.

UNMET NEED
Current stealth techniques are inadequate against modern wideband radar systems that utilize advanced signal processing techniques, such as Doppler filtering and clutter rejection. These systems can detect and characterize targets based on their velocity signatures, which traditional stealth materials cannot fully hide, especially when targets are in motion. There is a critical demand for new, versatile approaches that can dynamically conceal moving objects across broad frequency bands, without dependence on bulky structures or energy-intensive jamming.
Achieving true invisibility, especially during high-speed maneuvers, remains an unresolved challenge. We present a novel approach that exploits a fundamental vulnerability of radar signal processing, enabling practical broadband cloaking for moving objects without requiring complex shapes or heavy materials.

OUR SOLUTION
We introduce a semi-passive, broadband radar invisibility technique utilizing a time-dependent metasurface that dynamically manipulates the phase of backscattered radar signals. By applying a carefully calibrated temporal modulation—via voltage-controlled varactors—the metasurface induces artificial Doppler shifts in the reflected signals that precisely counteract the target’s real Doppler effect. This process effectively cancels the velocity signature that radar systems exploit for detection and velocity measurement. Experiments demonstrate that a metallic plate cloaked with our metasurface becomes indistinguishable from stationary clutter at frequencies spanning approximately 1.2–1.7 GHz, even when moving at speeds up to 0.04 m/s. This approach does not rely on scattering suppression but leverages a signal processing loophole, enabling broad bandwidth operation and practical deployment against modern radar systems.

INTELLECTUAL PROPERTY
Granted Patents in USA and Europe