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  "path": "/spotlight/spotid=69429.php",
  "publishedAt": "2026-05-19T20:42:39.000Z",
  "site": "https://www.nanowerk.com",
  "textContent": "A programmable metasurface stamps temporal codes onto ambient radio waves, enabling passive radar to detect and track drones with active radar precision and zero dedicated transmission.",
  "title": "Programmable metasurface enables passive radar to track drones without transmitting"
}