 |
|
| UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
| Reply |
|
|
LinkBack | Thread Tools | Display Modes |
|
#1
Posted to uk.d-i-y
|
|||
|
|||
I see the BBC reporters don't understand RFID tags.
On 21/08/2019 16:58, harry wrote:
On Wednesday, 21 August 2019 14:16:34 UTC+1, Andy Burns wrote: dennis@home wrote: Someone really should tell them that the normal RFID tags in use are not powered by radio waves Except they *are* they get parasitic power from the device that is scanning them ... I thought it was a magnetic coupling Correct, a RF field has both electric and magnetic components. |
|
#2
Posted to uk.d-i-y
|
|||
|
|||
|
I see the BBC reporters don't understand RFID tags.
On 21/08/2019 20:53, Fredxx wrote:
On 21/08/2019 16:58, harry wrote: On Wednesday, 21 August 2019 14:16:34 UTC+1, Andy BurnsĀ* wrote: dennis@home wrote: Someone really should tell them that the normal RFID tags in use are not powered by radio waves Except they *are* they get parasitic power from the device that is scanning them ... I thought it was a magnetic coupling Correct, a RF field has both electric and magnetic components. Google 'near field far field' -- "When a true genius appears in the world, you may know him by this sign, that the dunces are all in confederacy against him." Jonathan Swift. |
| Reply |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Forum | |||
| RFID FAQs - RFID Companies, Equipment, Medical ... | Electronics Repair | |||
![Fredxx[_3_] is offline](https://www.diybanter.com/images/SultanThemeVB3R/statusicon/user_offline.gif)
Linear Mode
