[BC] Bay spacing

[Dana Puopolo]

I have an FM station that is installing a transmitter atop a tall building
downtown. The reason is to penetrate the steel and concrete buildings there.
The customer has asked for a 2 bay 1/2 wave spaced antenna. I told him I
thought.625 wavelength spacing made more sense, because this antenna would
just be forming a minor lobe, which would be large enough to improve the
signal in the less tall buildings directly below the site, but not so large
that it would cause the kind of multipath that a full spaced 2 bay would
(think the minor lobing of a 3 bay half wave spaced antenna). 

Am I off base here?

-D