• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 16 subscribers
  • Views 669 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Distance detection problem with a EM4102 transponder

Yann Ropaul
Prodigy 10 points
Other Parts Discussed in Thread: TMS3705, RI-STU-MRD2
I work actually with a  RFID transponder with a frequency of 125kHz and a EM4102 protocol (  ). If you may, i have some questions.
First of all, i would like have a distance of detections more than 5 centimeters and a speed of detection near than 100 millisecond.
 Do you have some  advices  or  propositions  about the antenna  i must use  which can improve the distance of the transponder's detection. Which is the feature to improve the distance ? Must have change the circuit ?
 I woul like know which types of RFID transceiver you can advise me for my problem. It must be the lowest cost possible. If you may, i would like an example of the circuit to use it. 
  • 0
    TI__Guru* 91206 points

    Yann - 

    this transponder is not an ISO standard device and TI does not support it as such. 

    the closest device TI offers which is ISO standard are these:  ,  

    , reader IC to use would be the TMS3705 and reader modules would be RI-STU-MRD2 (in DIL or SMD form)

    speed of detection will be about 70mSec and to get 5cm should be no problem, usually ISO standard devices like what we offer here get roughly twice the distance of 125kHz tags.

    how much room do you have for antenna coil? maybe you might need about a 40mm diameter coil to get 5cm or more with our 12mm tags. other options might be viable as well, like using ferrite core on the antenna which will make field smaller, but might be more compact for your application.