Good point - didn’t really calculate that until now.
I also have to take into account attenuation for the long cables:
- AW7915-NP1 TX power per chain: 20 dBi/2=10 dBi per antenna
- gain sector/directional antenna: +13/+8 dBi
- attenuation cables RF240: 10m*(-0,41 dBi/m)=-4,1 dBi
- totalled = 19/14 dBi per antenna
While this still makes sense for the sector antennas (keep in mind mobile devices only reach a TX of ~16-17 dBi), it is semi-optimal for laptops (Intel cards have a TX of 20 dBi) and not acceptable for the the directional antennas.
First calculation didn’t take into account, that as an emitting party one has to take care about the output of the antennas and not only about what is parametrized in router software.
Therefore I checked what driver is accepting as maximum power for 2,4GHz: 29dBi (setting up in software as country “US”).
- TX power per chain: 29 dBi/2=14,5 dBi per antenna
- gain sector antenna/directional antenna/omnidirectional antenna: +13/+8/+4 dBi
- attenuation for cables RF240: assuming 10/2/0m*(-0,41 dBi/m)=-4,1/-0,8/-0 dBi
→ totalled maximum radiation power for sector antenna/directional antenna/omnidirectional antenna: 23,4/21,7/18,5 dBi.
So in my case one can set the TX-power to 22 dBi and will have in the end totalled 19,9/18,2/16 dBi.
Which is adhering to German/European law and completely satisfying my needs/covering the needed area of the allotment