RFID Passive Tags: Your No-Battery Tracking Workhorse
(And why they’re silently running your world) You’ve touched one today. That key card unlocking your office? The label on your Amazon package? Likely an RFID passive tag – a battery-free marvel turning everyday objects into trackable smart assets. Here’s how these unsung heroes actually work (no PhD required). How RFID Passive Tags Wake Up and Talk RFID passive tags have zero internal power. Instead, they hijack energy from RFID readers: UHF RFID Reader shouts: Sends radio waves (“energy packets”). RFID Tag catches: Tiny antenna harvests this energy. Tag talks back: Powers its microchip, replies with ID data. Reader decodes: Converts radio squeak into useful intel. ⚡ Real-world magic: Cykeo ’s warehouse readers scan 200+ boxes through cardboard in 3 seconds – all powered by this energy handshake. Frequency = Superpower (Pick Wisely) Type Range Best For Achilles’ Heel LF (125 kHz) 1-5 inches Animal chips, key...