Posted on July 02, 2014 at 16:29Hello
I want to build a reader to communicate with ISO14443A and ISO15693 tags using the CR95HF transceiver IC. I build a 2 turn PCB antenna and calculated the matching of the PCB antenna according to AN4327 and the excel tool.
With VPS_TX = 3,3V I get performance equal to the PLUG_CR95HF demo board.
I tried also to match the antenna for VPS_TX = 5V (assuming better read range) and with this setup it is possible to power tags over a greater distance but I cannot communicate (receive) with the tags. I get little improvement by tweaking the Timer Window and Receiver Gain (5.8.1 and 5.8.2 CR95HF datasheet). But the only way to determine these values I found was �try and see�.
So my question is how to measure or determine the right values for these parameters.
With best regards
Marco
#cr95hf #cr95hf #5v
