RFID active tags at 13.56 MHz

[john]

Hi

Is it possible to use active tags at 13.56 mhz and compatible readers.
I am trying to evaluate whether there is a need for using rfid for one
of our applications. Following are the requirements-

1. Range - upto 3m
2. Small form factor of reader - micro
3. Card sized tag - passive/active.
4. Conformance to iso15963

Could someone tell me whether this would be possible? Most of what i
read and what is available limited the read range to < 1m.
I was wondering whether using active tags would increase the read range
to say 3m. Because i read somewhere that passive tags dont function
beyond 1m. Are there any existing apps. which use such devices.? any
architecture/design docs?
Would really appreciate the help

rgds
john

 

[Joerg]

Hi John,

With an active tag 3m should be no big deal. Just remember that 13.56MHz is often referred to as the 'international dummy load frequency'. That's where all kinds of hardcore noise is generated, from small devices all the way to diathermia equipment and industrial welding gear.

So while it may work in one location, another might cause failures because the signal is swamped by strong interference.

Regards, Joerg

http://www.analogconsultants.com

 

[john]

I am sorry, what is meant by dummy load frequency..I was under the
impression that 13.56 Mhz rfid systems offers high immunity to noise
???

 

[Dave VanHorn]

It's poetic justice though, considering where the second harmonic ends up

 

[Joerg]

Hi Dave,

It's poetic justice though, considering where the second harmonic ends up

Yes, but 27.12MHz is also dedicated as ISM.

Regards, Joerg

http://www.analogconsultants.com

 

[Dave VanHorn]

It's poetic justice though, considering where the second harmonic ends up



Yes, but 27.12MHz is also dedicated as ISM.

Sidebands.