Linear polarization in RFID refers to radio waves that oscillate in a single plane (either horizontal or vertical). While linearly polarized RFID antennas are useful for applications requiring focused energy, they also have several advantages:

1. Limited Orientation Flexibility
Linearly polarized RFID antennas require the tag to be aligned with the same polarization (either horizontal or vertical).

2. The fixed place
RFID E-seal  is always fixed the same place, so it is got the best read rate.

3. Increased Sensitivity to Environmental Factors
Metal surfaces and liquid environments can affect the performance of linearly polarized signals, causing signal reflections or absorption.

4. Requires Careful Installation and Alignment
RFID systems using linear polarization need careful antenna and tag placement to ensure consistent performance.

For applications requiring single-angle reading or dealing with predictable RFID E-seal orientations, Linear polarization is usually a better choice