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#1 2015-06-07 08:49:40

skappy
Contributor
Registered: 2014-01-13
Posts: 91

Using the extracted antenna of a tag ?

HI,
May I ask you if, according to you, the antenna extracted from  an rfid tag could be used as ana antenna with the proxmark please ?
I need to sniff communication in a very short place, could it be a solution ?

Thnak you very much
Have a nice day

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#2 2015-06-07 11:57:17

asper
Contributor
Registered: 2008-08-24
Posts: 1,409

Re: Using the extracted antenna of a tag ?

Frequency depends on the capacitor coupled with the antenna so i don't think it will be a good solution.

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#3 2015-06-07 15:32:24

skappy
Contributor
Registered: 2014-01-13
Posts: 91

Re: Using the extracted antenna of a tag ?

thank you very much Asper,
I would like to sniff communication between reader and tag but the room is quite tiny (10 mm * 40 mm) ?
Have you ever heard about something that could you the job please ?
Thank you very much for the help
Have a nice day
Skappy

Last edited by skappy (2015-06-07 15:33:53)

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#4 2015-06-07 18:18:45

asper
Contributor
Registered: 2008-08-24
Posts: 1,409

Re: Using the extracted antenna of a tag ?

You need to test/sniff the tag against a normal reader and build yourself an antenna with the size you mentioned and test various configurations/swirl numbers.

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#5 2015-06-08 14:13:08

skappy
Contributor
Registered: 2014-01-13
Posts: 91

Re: Using the extracted antenna of a tag ?

Thx Asper,
Do we have any idea about the value of the inductance of the PM3 antenna please ?
I will try to build it by myself but i'm looking for the inductance value that shouldbe reached...
Thx a lot

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#6 2015-06-22 16:18:02

cilek
Member
Registered: 2014-07-18
Posts: 2

Re: Using the extracted antenna of a tag ?

skappy, I have been trying to find a similar solution for quite some time now. Is there anyways that we could achieve this without having to modify an antenna embedded in any current products, if not RFID tags, perhaps something else. I was hoping that you have experimented with communication within small spaces already.

Regards,
Mert Cilek
http://blog.7pcb.com

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