equations for lumped port in RFID tag anenna ??

hiii....i need formula of equations for dimension of lumped port of design tags antenna in RFID system using HFSS sofware

The lines of your RFID tags should have a particular width by themselves. You can just use a square of this side length for your lumped port. I have found this to be sufficiently accurate.

i am concern about how to read 7 bytes fast as fast possible for RFID