Timeline for RFID read distance and frequency
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 17, 2022 at 18:40 | comment | added | Jun Seo-He | en.wikipedia.org/wiki/Free-space_path_loss | |
| Feb 17, 2022 at 18:30 | answer | added | ppostma1 | timeline score: 1 | |
| S Feb 17, 2022 at 14:06 | history | suggested | jcaron | CC BY-SA 4.0 | Formatting |
| Feb 17, 2022 at 13:23 | review | Suggested edits | |||
| S Feb 17, 2022 at 14:06 | |||||
| Feb 17, 2022 at 8:05 | history | edited | ocrdu | CC BY-SA 4.0 | deleted 36 characters in body |
| Feb 17, 2022 at 1:26 | comment | added | DrMoishe Pippik | Antenna length: RFID generally rely on near-field, coupling, which falls off exponentially. This is considered evanescent, i.e., dropping to effectively nothing beyond a certain distance. Antennas in the 10-15 kHz bands, used to reach submarines, are kilometers long and use hundreds of kW power. en.wikipedia.org/wiki/VLF_Transmitter_Cutler | |
| Feb 17, 2022 at 1:09 | comment | added | Kartman | The lf and hf rfid use magnetic coupling - effectively the reader and card form a transformer. This is so enough energy is transferred to power the card. | |
| S Feb 17, 2022 at 0:47 | review | First questions | |||
| Feb 17, 2022 at 8:07 | |||||
| S Feb 17, 2022 at 0:47 | history | asked | Chmaykel | CC BY-SA 4.0 |