Sector WiFi antennas, does the radiation angle match the reception angle?

Question

WiFi

Let's say in the antenna specs it is written that the vertical and horizontal radiation angles are 60 degrees, does this mean that the effective reception of the antenna is in the same range and the signal that came at an angle of 90 degrees will already be partially or completely muffled?

Answer 1

The electromagnetic field antennas are characterized by the principle of reversibility. This means that the reception and transmission of the antenna behaves exactly the same.
What radiation pattern you received at the reception, the same (you can be sure) it will demonstrate during transmission. This is widely used when tuning the antennas of very powerful transmitters so as not to torment the equipment and the surrounding space in vain.

Will the signal coming at an angle of 90 degrees already be partially or completely muffled?

As a rule, the radiation patterns of antennas (even narrow-beam ones) are multi-beam, so more partially than completely.

vertical and horizontal radiation angles of 60 degrees,

The shape of the lobes is rounded, without sharp breaks, so it is customary to consider the boundaries of these lobes at a level of 30% of the maximum, which is radiated along the axis of the antenna. At your 90 degrees, it can turn out to be both a fraction of a percent and 10 ... 15%.

effective reception of the antenna leads in the same range

If the antenna is multi-band, then its pattern differs in different frequency ranges, sometimes quite strongly.

Answer 2

Yes

Answer 3

yes, that's right, read about the polarization and propagation of radio waves
, here are books on the topic https://drive.google.com/file/d/1nTyBzppzAYturNEUe...