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Which provides better performance: circular polarised or linearly polarised GNSS antennas?

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Linearly polarised antennas propagate EM energy on a single plane: either vertical or horizontal. Conversely, circularly polarised antennas emit EM energy on two planes. Each option has a set of advantages and disadvantages, but linearly polarised antennas tend to perform best in most applications.

On the same gain, linearly polarised antennas tend to have a greater read range, this is due to their concentrated emission. So, as long as you are aware of the orientation of your device in-situ, a linearly polarised antenna would be a better choice.

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