Thank you nubbage, Could you reconsider please (I
think differently at least on Tx - why do you thin
I am wrong? )
Given the assumption of the
original single antenna link has the same parameters
to the NTx/ MRx case - same output power per antenna,
NF per antenna, etc + no reflections, line of sight,
ideal spatial summing at the max gain direction,
array max gain direction same as the single antenna
max gain direction, and any other assumption that
minimizes the problem to the simple one.
For the Tx antenna side, for sure fields of the
N antenna sum perfectly. So if at point P in the
single antenna case field was for example E it will
become now N*E. (The E vectors are all in the same
size and direction according to the assumptions
above).
Therefore the transmitted power which
is proportional to E^2 willl follow the 20*LogN
at point P.
So, the antenna gain in the link
budget will increase by 20*LogN compared to the
N=1 case.
i.e. at point P
What happens
on the Rx side?
