Hello MKova,
my first answer would be to use the same antenna as used in our demo video: Poynting Patch A0025.
This antenna is a very long range antenna able to reach distances above 13m with our reader.
as mentioned by Bart: "reaching a specific read distance depend on a number of things" (cf thread: https://community.st.com/s/question/0D73W000000PdgB/i-can-read-up-to-50-centimeters-how-can-i-change-the-reading-distance)
Let me reproduce his answer:
"reaching a specific read distance depend on a number of things including the reader output power, environment, tag model, tag orientation, material the tag is mounted on.
Typically a link budget calculation helps you to figure out which antenna gain is required to establish the link and hence which antenna model.
I am guessing, and apologies I am wrong, you would like to run a quick test.
Consider A5020 from Times-7.
If this antenna does not fit your requirements e.g. size, you might browse their portfolio and/or look at Laird or MTI as well finding an antenna with a similar gain.
"
regards,
Cedric.
