And it is, because it's categorized as a common type of omnidirectional antenna:
https://study-ccnp.com/directional-antenna-vs-omnidirectional-antenna/
See the patterns this way:
Elevation pattern: You are seeing the propagation standing in front of the antenna in a vertical perspective.
Azimuth pattern: You are seeing the propagation from above the antena in a horizontal perspective.
Combine both views and you rarely miss.
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