RFID old design and RFID new design - support request
Hello people.
In 2020, our company made a PCB prototype (designed by me) which included a chip " ST25R95-VMD5T ". Our results were not good, but maybe this was due to a poor filter circuit and due to a poor matching circuit. The tag reading distance was very small, and the prototypes were not fixed (filter and matching), and we abandoned the project.
So in the same year of 2020, we were planning to make another PCB prototype, but then using the chip " ST25R3911B-AQFT ", with the intention that the reading of tags could reach a bigger distance, but we ended up not doing this prototype in 2020.
Now, it's 2026, and we plan to make a PCB prototype, very simple. And our initial choice was the " ST25R3911B-AQFT ". I would like to ask if there are more recent chips than this, possibly one chip that can reach a bigger reading distance than this " ST25R3911B-AQFT ", or that reaches the same distance reading, but that has more recent technology.
Remembering that this time we will first design a PCB coil / antenna, produce a bare PCB of it, and measure its parameters (measured by a third party). If I remember, there are 4 parameters, like the self-resonating frequency, parallel resistance at the resonating frequency, inductance @ X MHz, and DC resistance @ X MHz. We will get the measurements, and use them on the online calculator of ST that calculates the values of all components of the entire circuit between the antenna and the chip (filter and matching).
The chip " ST25R3911B-AQFT ". I would like to ask if there are more recent chips than this, possibly one chip that can reach a bigger reading distance than this " ST25R3911B-AQFT ", or that reaches the same distance reading, but that has more recent technology.
Regards,
Jeferson Pehls.