Proximity Readers Tutorial

Author: Brian Rhodes, Published on May 20, 2013

One of the most common credentials is also the most confusing. How exactly do proximity cards 'read' into an electronic access system? Despite being widely used by more than a half-dozen 'contactless credential' types, that these credentials use nothing more than a simple wave in front of a reader can discount just how complex the process is. In this note, we look at 'proximity credentials', how they work, and the technology behind them.

What is 'Prox'

'****' ** **** * ***** ******** ******** **** ********** ******** ******, ** **** ** * **** ** ******** * ***** of*********** **** *********** **** *** **** ***** **, *** ** *** ***** *** reader. *** ********** **** ******* ** *** *********** ******, *** these '***********' **** *** *** **** ******* ********** ** ************ and *** ******** ** *** **** ***** **********.

Proximity *****

* *** ** *** **** ***** '*********' ***** ***:

  • *** *** ****: ***** ********** ** *** ****. ************* ** '*****' *** kHz **** *****, ***** ** *************, *** ******* ******* **** have ******* ** **.** ***.
  • **.** *** ****: ******* * ******* **********, *** ******* ******* *****, ******** in ******* ****, *** ********* ****** ** ****** ** ******* offers ********** **** ***** *** ***.
  • ******* ******: ******* *** ** (***'* ********* ******), ********** * **.** *** ***** ****** ***** ** ******* ** international ****** *********.
  • ******/**********: ***** *********** ******* **** **** *** '***********' **********, **** may ******* ****, **.***, ** ***** *********** **** ***** **** may ******* *****/******* *********.

**** ****** ***** ******** ******* ***** *** **** *******, **** are *** ***************. **** ********** ****, ********* *********** *** ****/**** in *** **** ***** ***, *** *** ****** ** *** information **** ******* *******. ** ********** ******** *** ** ****** and *** * ********* ******** ******* **** ** ****** **** key, *** **** **** **** ** ******** **** * **** to ****. ********, * ******* **** **** *** ******** ** a *** *** ******, *** **** *********** *** *** **** mechanics.

*** ********** ** *** ********** ******* *** ***** *** ********* frequencies; **** ****** '*********' **** *********** ** ***** ** *** same **** ******* ************ ******.

Resonant ****** ********

*** *** * ******* **** ** ***, **** ** ******** battery, *********** *********** **** ** *** *** ** * ****** or ****? ********* ***** *** "******* ****" ******** **** **** on **** ***** ****** ** ****** ***** ** *** **********. At **'* ****, ******** ****** ******** **** ****** ********, ********** transferred *** * ***** ***** *****, *** ********* ** ** antenna ******** **** * **** ** ***.

***** ******, *** ***** ***** ********** ***** **** * *** milliseconds ** ** ****** ****** *** **********. *** * ******** demonstration ** '******** ****** ********', *** *** ***** **** ***** of ******* * ********* **** * *********:

** *** **** ** **********, *** ***** ******* *** ***** gas ****** *** **** *** ****** ** ** ******. *** proximity ***********, *** ***** ****** ******** ** **** ******* *** tightly ********* **** *** ******** ********** ** ******* *****, *** the ********** ****** ***** *** ****, **** *** ********** ****** place ** *** **** *** *** **** ****** ********* *****.

Inside **** *****

*** '************' **** ********** ********** **** ********** ** ***** ***** components, ********** ** *** ***** *****:

  • ******* ****:* ******* **** ****** *******, ********* **' ** ****, ** coiled ****** *** ********** *** **** ** * ************* *******, both ********* (*** **********) *** *********, *** **** ************ *** ICC ****'* *********** ** * ******.
  • *********:**** ********* ******, *** * ***** ******, *** ****** ******* by *** ******. **** *** ******** ** *** ********* ** reached, ** ************** ********** **** *** *** **** *** *** antenna.
  • *** ****:*** **** ****** *** *********** ********* ** *** **********, ********* discrete ******* **** ******** *****, ****** ** *******, *** ***** static ******* ****** ** *** ****. **** *********** ** ********* to *** ********* ****** *** *** ******* ****.

* *** ************** ** **** ********** ** *** *** ***** requirements. ***** *** ****** *********** ***** **** ******* ***** **********, it ***** *** ********** **** ** ********** ***** ** *** energy ****** - *** ******. **** ********* *** '*********' **** must ** **** ****** **** **** *** ****** ** ***** to ** *********:

** *** **** ** '**** *****' *******, *** **** ** the **** ** ******. ******* *** ***** ** *** ****** cannot ** ********* ****** *** ******* ******, *** ******** **** and *********** ** *** ******'* ******* **** ** ******. * typical ********* ****** **** ******* ***** *" * *" * 0.5", * **** ***** ** **** *********** ************* ** ** *'*** ******* **" * **" * *".

Comments (2)

*****, **** ***** *** ***** *** **** *****. ** *** well ** * **** **** ** ******* ********* **** ***** of **.*** ** ****** (****** ******) *** *********** ************ ** well ** ****** ******** ** **** ***** ** ****** ******.

**** ****** ** ***** * ****** ***** ** *********** **** after ** ***** **** ***** ************ ** **.***** ******** ** market **** ****** **% ** *** ***** (*** **********) ****** low ********* ******** **** *****. * *** ** *** **** lifecycle ** ****** *******.

*********** **** ****** *** *** **** ******** *** ****** ****** and **** **** *********** ******** ** **** **** ******* *** only ***/***!! **** **** **** *** *****'* **** *** ***** should ***** ***** ****** ****** *** **** ********.

****** *****.

***** ******* *****. ******** **** ***** *** *********** ** **** technologies, *'* *** ********** ** ******** ********* ** **** ******** questions

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