<s>
An	O
array	O
is	O
simply	O
a	O
group	O
of	O
objects	O
,	O
and	O
the	O
array	B-Algorithm
factor	I-Algorithm
is	O
a	O
measure	O
of	O
how	O
much	O
a	O
specific	O
characteristic	O
changes	O
because	O
of	O
the	O
grouping	O
.	O
</s>
<s>
A	O
well	O
designed	O
antenna	B-Algorithm
array	I-Algorithm
,	O
allows	O
the	O
broadcast	O
power	O
to	O
be	O
directed	O
to	O
where	O
it	O
is	O
needed	O
most	O
.	O
</s>
<s>
These	O
antenna	B-Algorithm
arrays	I-Algorithm
are	O
typically	O
one	O
dimensional	O
,	O
as	O
seen	O
on	O
collinear	O
dipole	O
arrays	O
,	O
or	O
two	O
dimensional	O
as	O
on	O
military	O
phased	O
arrays	O
.	O
</s>
<s>
The	O
array	B-Algorithm
factor	I-Algorithm
is	O
the	O
complex-valued	O
far-field	B-Algorithm
radiation	I-Algorithm
pattern	I-Algorithm
obtained	O
for	O
an	O
array	O
of	O
isotropic	O
radiators	O
located	O
at	O
coordinates	O
,	O
as	O
determined	O
by	O
:	O
</s>
<s>
The	O
array	B-Algorithm
factor	I-Algorithm
is	O
defined	O
in	O
the	O
transmitting	O
mode	O
,	O
with	O
the	O
time	O
convention	O
.	O
</s>
