Is there any information on antenna diagrams (radiation patterns) for cAP ac access point?
Their antenna gain (a measure of directivity in fact) is near 2 dBi according to specifications. So, the diagram is not spherical (i.e. non-isotropic, >0 dBi).
On the other hand both cell and wall mounting are supported for cAP ac. And one of that ways may have lower performance in some cases due to non-isotropic diagramm.
You are talking about theoretical physics.
In practical measurements, for all intents and purposes (like real life), cAP ac antenna radiates in roughly spherical pattern.
I already said “for all intents and purposes”. If you can show me a phone, that will not have wifi signal in real life situation (10-15 meters away), if the cAPac is rotated in a certain way, then we will talk again.
No antenna patterns for own radiowave product but a lot of importance.
And not, far field antenna pattern is NOT only theoretical matter. It is purely practical matter. Not to have corresponding documentation on the product is just ridiculous.
We do have patterns for larger devices. This is a home access point. With an antenna this small, there is little practical use to make measurements for radiation, if the result is roughly spherical. There is no practical difference in the end. Can you provide a reason why you need it?
One of the options I’m examining is an option of mounting the cAP at a non-armored gypsum wall between two rooms. So, the second room will be behind cAP’s back. Will cAP cover that direction?
Of course it will cover. Do not ask how much. The gyps wall can attenuate 4-8 dB. It mostly depends on the noise in the other room. How many other networks are in the neighbourhood, are they all nicely separated by 6 channels?
So THAT is your bottleneck, not the radiation pattern. You can have “full bars” in the other room, but the performance is 1-4 mBps. Why? See the first paragraph.
Unless you are in a bunker, and there is NO 2,4 GHz in the vicinity. Do not forget that a lot of “wireless camera’s” also use the 2,4 GHz band, and NOT with the WiFi protocol. So you will never see them on any simple WiFi analyse tools.
For indoor do not worry about the patterns. Only for a panels, dishes and other “special” types of antenna, that information is relevant. In a house situation you will have so many reflections, that you will not know where the real signal is coming from, reflection or the direct pattern of the AP. Do not worry, install and see. If not enough, drill a hole to the other room, and hang another one.
I agree with the above. You can safely assume the pattern is roughly spherical, then take into account all obstacles and absorbtion by your wall.
If radiation pattern would be not a 100% sphere, but a little squished to one side, it doesn’t mean there is no signal in the back. It just means it is slightly weaker, but the difference in “home AP environment” is negligible.
It all sounds clear. Believe me, I do know what antenna patterns are and what is their influence in applied cases.
But anyway my question is more about formal side of the issue than about asking for solid advice.
Any non-DIY “adult” antenna device usually does have its pattern described as a part of the technical documentation and I’d like to look at it just like in the case of UniFi devices.
I can’t speak for the others who have participated in this thread, but I use these devices in the decidedly commercial environments of motels and apartment building hallways. Why treat them as if they’ll only ever be used as consumer devices in a residential setting?