VE6JY:
>What about stacking say, 4 yagis at the same height, all in the same
>direction? i.e. echelon...what is the resulting pattern like and what
>is the optimum and minimum boom to boom spacing?
I did a simple model of this. I used one dipole versus 4
collinear dipoles at 0.5 wave spacing (which is what the ARRL Antenna
Book shows to be about optimum for max gain). Results:
1 Dipole 4 Dipoles
Free Space Gain (dBi) 2.11 8.61
Beamwidth (deg azimuth) 78 12
For Yagis which have a typical beamwidth of 50-60 degrees, the
compression of the phased array would be even more...way too narrow for
contesting (but fine for DXing).
73, Bill W4ZV
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