I use UHF RFID readers to read Gen2 RFID tags. Here's the reader I use but it could be any equivalent reader configured to run at 902 - 928 MHz. https://www.digikey.com/product-detail/en/thingmagic-a-jadak-brand/M6E-MICRO/1523-1004-ND/4842688
For a new project, I want to read tags under a 30 foot long bench (athletes have Gen2 tags on their ankles and I want to determine who is sitting at the bench). I only need a 2ft read range.
Off-the-shelf RFID antennas are so small that I would need a large number of them to cover a 30foot length of bench. I could probably do it with 16 antennas and two 8-port splitters it's pretty clunky and expensive though.
So my question is, could I create long, cheap antennas by fixing wires to a plastic backing, similar construction to an electric blanket. I imagine I'd need two wires running in parallel to one another, a specific distance apart and maybe some capacitors bridging the two wires. It would be ok if the antennas were quite inefficient as the reader I use is quite powerful and the range I need is quite small.
Not sure where to start on the design of the antenna though. I haven't been able to find designs for UHF RFID antennas yet.
really appreciate any guidance on this!