Way to get signal strength from an RFID reader?

Question

I am attempting to make a grid of RFID readers that can triangulate the position of a tag within their read range.

I am currently using MFRC522 readers connected to a Raspberry Pi 4 Model B (4gb) and reading using the SimpleMFRC522 Python library.

This is great in that it lets me easily read from & write to the tags that the readers can detect.

I would like to try to triangulate the relative position of a tag by using several readers to gauge signal strength from each one, with the intention of scaling up to have a grid of readers (or antennae connected to multiplexers) that can track the position of a tag as it is moved across a larger area (think a few feet across).

Is this possible using MFRC522 readers, or is this something that could be done with other readers or a specific chip connected to other antennas? I can't see any methods to return signal data from the SimpleMFRC522 library, just read & write methods.

Is there a command I can send to the reader to return this data?

Perhaps you can consider two grids: RFID reader and RF detector. Or one RFID reader with a servo, another RF detector also driven by servo. — tlfong01, Aug 21 '20 at 03:15
Thanks for the suggestion! I am open to suggestions on how best to accomplish an accurate and fast tracking grid. Although given i want to scale it up cost is a consideration, and rc522 is very cheap to buy hence why i started there. — totallyNotLizards, Aug 21 '20 at 09:34
You are welcome. I am just brainstorming. I only started learning RFID reader, RF detector, and GPS sensor about a year ago and have only played RFID and GPS for perhaps less than 100 hours each. I have not played with RF detector yet, because I think it is not that useful for my current project. For SimpleMFRC522, I am just scratching the surface. So I will be glad that all can join in to learn together. Cheers. — tlfong01, Aug 21 '20 at 09:41