1M reading range with ST25 - is it possible?

[AErof]

Datasheet says these readers support ISO/IEC 15693 standard for vicinity cards. I need a system with high reliability (99%) read for distances up to 1 meter (0.5-0.7 m as the most probable range). Can I use this IC for building such reader alone, or I need additional RF components? What size the antenna should be?

Also, what kind of tags will work best? I can make powered tag as well, but I need min 6 month battery life on something like CR2032.

[Travis Palmer · Accepted solution]

Hello,

Increasing the reading range to 1 meter will likely require to:

*) adapt the reader antenna size to optimize the power transfer from reader to tag in 1 meter distance

*) if possible to also adapt the tag antenna size

*) add an additional amplifier between IC's RFO pins and matching network

13.56MHz RFID has been developed for proximity operation.

There are other RFID technologies which are meant to transfer data over larger distances.

If this would be an option, please have a look at the ST25RU products.

BR Travis

[AErof]

Thank you. Does ST have reference designs or evaluation kits for such use cases?

[Travis Palmer]

Hi,

There are no reference designs or eval kits for ST25R products with more than 1.4W ouput power available.

BR Travis