Circular Polarization vs. Linear Polarization: Which is the Right RFID Antenna?
What is the Difference Between Circular Polarization and Linear Polarization?
The choice between circular polarization antennas and linear polarization antennas can make a significant difference in an RFID system.
Linear polarization occurs when electromagnetic waves broadcast on a single plane (either vertical or horizontal). Linear polarized antennas must have a known RFID tag orientation and the RFID tag must be fixed upon the same plane as the antenna in order to get a consistent read.