A “linear polarization” antenna focuses radio energy from the reader in one orientation (or polarity). This makes it possible to increase the reading distance, being able to increase the penetration capacity of the emitted radio wave.
“Circular-polarized” antennas emit radio waves in a circular manner. In this way, the range of the reader is less but there are more chances to “hit” the tag; in fact, the latter type of antenna is used in situations where the tags applied on the products cannot be controlled, whereas in case of readers equipped with “Linear-polarized” antenna, the tags will have to be aligned in the direction of the antenna itself.
