Proxmark3 community

Research, development and trades concerning the powerful Proxmark3 device.

Remember; sharing is caring. Bring something back to the community.

"Learn the tools of the trade the hard way." +Fravia

You are not logged in.


Time changes and with it the technology
Proxmark3 @ discord

Users of this forum, please be aware that information stored on this site is not private.

#1 2017-02-27 23:12:21

From: Biloxi, MS
Registered: 2017-02-27
Posts: 6

134khz antenna questions

I am new to the forum, after doing a bunch of research, thought someone here might be able to help.

I am working on a project to replicate the actions of an RFID tag when it is scanned.  In the sense that when it is scanned it performs an action ( creates small voltage to do XXXX ). 

The frequency of the scanner antenna is 134khz and is 1.5 inch diameter.  The power out is unknown at the moment to me and will have some degree of range.  The scan reach is approximately an inch.

Currently I have reproduced another handmade antenna that does exactly what I want.  But it is 1.5 inch diameter and I would like to shrink this antenna to .5 inches.  I don’t have any real test equipment other than a multi-meter but the antenna will light an LED ( 1ma  and 1.6v ) which is really all I need.  Just want to trigger a solid-state relay.  Overall goal is to have the most volts and amps that can be gained.

The current antenna is 1.5 inches using 39 awg wire with 70 turns which from an online calculator gives around 290uH.  I have no idea how proficient this antenna is compared to a properly tuned one.

So to the help needed…
1)     Can this program help me make and tune an equivalent .5 inch antenna?
2)    How much better if any would it be ( power out) ?
3)    Can you tell me approximately what wire size I would need to make this into a .5 inch antenna so I can go ahead and get it ordered or is it just a matter of using the same wire size with a different number of wraps.

If there are any questions or more information is needed I will try to answer them best I can.



Board footer

Powered by FluxBB