RFID Antenna Design - Is This Possible?
RFID Antenna Design - Is This Possible?
(OP)
Hey everyone,
Looking for someone in the know regarding RFID reader antenna design. Part of a project I'm working on requires a custom RFID transmitter antenna. If possible, I'd like to design the antenna as an integral part of a steel cylinder. I know there are on-metal tags, but is it possible to design an on-metal reader antenna? Please see the very rough diagram I've attached - the red represents the antenna location. It would basically need to be mounted on the face of the steel cylinder with some sort of epoxy. Read range requirements are very low, less than 1cm. The antenna would likely need to be 10-12 inches long. Thanks
Looking for someone in the know regarding RFID reader antenna design. Part of a project I'm working on requires a custom RFID transmitter antenna. If possible, I'd like to design the antenna as an integral part of a steel cylinder. I know there are on-metal tags, but is it possible to design an on-metal reader antenna? Please see the very rough diagram I've attached - the red represents the antenna location. It would basically need to be mounted on the face of the steel cylinder with some sort of epoxy. Read range requirements are very low, less than 1cm. The antenna would likely need to be 10-12 inches long. Thanks
RE: RFID Antenna Design - Is This Possible?
RFID tags come in a range of frequency bands. What band is involved here?
RE: RFID Antenna Design - Is This Possible?
Any approximate idea how deep the slots would need to be so that the antenna sits flush with the cylinder face? Or how much of a gap would be required between the cylinder face and the antenna?
Also - how far could I wrap the antenna around the cylinder? Would 180, 270, or even 359 degrees cause issues? The idea here being an antenna that could read a tag from any orientation around the cylinder face.
RE: RFID Antenna Design - Is This Possible?
If it only needs to span a cm, then perhaps a simple half-transformer multi-turn loop might work. Depending on the reader transmitter, you might need to provide a matching circuit.
RE: RFID Antenna Design - Is This Possible?
RE: RFID Antenna Design - Is This Possible?
Obviously 125 kHz is even moreso.
RE: RFID Antenna Design - Is This Possible?
I suggest you attempt to buy RFiD antennas and evaluate how well they work. You need to have a system spec for what will work.
A normal antenna would be a slot with coax across it, and the slot and internal cylinder would be filled with high dielectric and probably lossy potting or MAGRAM, which usually is high dielectric, potting compound and low loss at your frequencies.
Kevin