A group of Chinese researchers has developed a unique technology that enables complex mathematical calculations to be performed directly on radio waves as they interact with a specially programmed surface.
They created a reprogrammable metasurface—an ultrathin structure coated with microscopic elements capable of dynamically changing the direction, phase, and amplitude of waves.
Using a digital time-domain encoding concept, the metasurface becomes a true "electromagnetic spatial computer," processing information as the waves propagate.
During their experiments, the scientists configured the system to perform two basic signal processing operations—Fourier transform and convolution.
nature.com/articles/s41467-026…
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