Below

One method of eliminating* sidelobes from an array is to use 1/2 lambda
element spacing and in-phase, binomial power distribution to the elements.

This has been done in FM broadcast transmit arrays to reduce radiation
levels on the ground immediately adjacent to the tower. Paper 5 at
http://rfry.org shows some of the considerations for its use. Paper 10 at
the same site is a slide show wherein slides 20 and 23 also deal with this.

R. Fry

* in free-space theory, anyway
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"David Harper" wrote
I believe you didn't fully understand my question: How do the other side
lobes get reduced and/or eliminated? Theoretically, in some phased
array antenna configurations, some lobes have an undesirably high
a gain. I was wondering what filters / engineering work arounds were
used to mitigate this. Other posts have adequately answered this
question, however. Thanks anyway.