RFID bandwidth at 6.8 GHz?

[sayyedjamal]

Hi there

If one familiar with RFID systems knows one of the operation frequencies of this systems is 6.8 GHz, however I could not find the bandwidth of RFID at 6.8 GHz. Is this from 6.65~6.95 GHz or not.....???

Can anybody help?

 

[davenn]

6.7 to 6.9 GHz

 

[sayyedjamal]

6.7 to 6.9 GHz

Thx buddy....
But how come I could NOT find it in anywhere?
Would you please introduce me a reference for this? Book, paper, etc.

Really appreciate in advance.
Good luck

 

[volker@muehlhaus]

http://rfid-handbook.de/about-rfid/radio-regulation/19-frequency-ranges.html

 

[sayyedjamal]

http://rfid-handbook.de/about-rfid/radio-regulation/19-frequency-ranges.html

Thx dude...
But there is still no frequency range for 6.8 GHz!!!!:sad::sad::sad:

 

[FvM]

I don't recognize 6.8 GHz as a commonly accepted RFID frequency, it's neither mentioned in FCC or ETSI documents. Where do you see it specified?

 

[sayyedjamal]

I don't recognize 6.8 GHz as a commonly accepted RFID frequency, it's neither mentioned in FCC or ETSI documents. Where do you see it specified?

I mainly see it in notched-band UWB filter/antenna when some frequencies in the UWB band from 3.1~10.6 GHz is rejected, here is an example:

https://ieeexplore.ieee.org/xpl/art...fid+6.8&newsearch=true&searchField=Search_All

 

[davenn]

Thx buddy....
But how come I could NOT find it in anywhere?
Would you please introduce me a reference for this? Book, paper, etc.

Really appreciate in advance.
Good luck

hi ya

I found it doing a google search ... have just tried again and cannot find the same article grrrrr
If I find it again I will post a link

cheers
Dave

 

[volker@muehlhaus]

I mainly see it in notched-band UWB filter/antenna when some frequencies in the UWB band from 3.1~10.6 GHz is rejected, here is an example:

I think the authors meant 5.8GHz (ISM band).
If you look at frequency regulations, 6.8GHz is a satellite communication band.
https://transition.fcc.gov/oet/spectrum/table/fcctable.pdf

 

[sayyedjamal]

hi ya

I found it doing a google search ... have just tried again and cannot find the same article grrrrr
If I find it again I will post a link

cheers
Dave

Thx. That will help me a lot...

- - - Updated - - -

I think the authors meant 5.8GHz (ISM band).
If you look at frequency regulations, 6.8GHz is a satellite communication band.
https://transition.fcc.gov/oet/spectrum/table/fcctable.pdf

Thx, I'll check this out.
But there are other references that tried to reject this band (i.e. 6.8 GHz RFID).

Thx again.

 

[volker@muehlhaus]

But there are other references that tried to reject this band (i.e. 6.8 GHz RFID).

My best guess is that someone started with a typo (6.8GHz instead of 5.8GHZ) and others based their designs on that mistake. If you search for "6.8GHz RFID" your edaboard thread is now at position #1, indicating that there are very few publications for that keyword.

 

[sayyedjamal]

My best guess is that someone started with a typo (6.8GHz instead of 5.8GHZ) and others based their designs on that mistake. If you search for "6.8GHz RFID" your edaboard thread is now at position #1, indicating that there are very few publications for that keyword.

Maybe....I don't know....maybe....but it's weird, isn't it?