[BC] Two-tower array designed for 990 running on 1030

[Thomas G. Osenkowsky]

>My assumption is that DA designers
>like the fact that the shorter spcing produces a bit more gain in front of
>the pattern and a slighlty narrower pattern without sacrificing much in the
>depth of the minima behind the pattern.

While short spacings may appear to have the benefit of a slight gain
over a non-D counterpart, the downsides are high RSS:RMS ratio,
poor bandwidth and low drive point impedances. The vectors in the
main lobe do not add up to the total i.e. there is a residual.

There is no free lunch!

Tom Osenkowsky, CPBE