Simple antenna gain calculation
Back of the envelope antenna-gain calculation for an 8-Bay antenna compared to a single dipole:
Each time we double the number of dipoles we get 3 dB more gain.
Two dipoles = 3 dB more gain
Four dipoles = 3+3 dB more gain
Eight dipoles = 3+3+3dB more gain
Add an other 3dB when we add the reflector then the total 8-bay antenna with reflector = 12 dB better than a single dipole. (this is assuming all dipoles are adding in phase)
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