<s>
A	O
Cutler	B-Algorithm
feed	I-Algorithm
is	O
a	O
type	O
of	O
antenna	O
used	O
in	O
radars	O
operating	O
in	O
microwave	O
frequencies	O
.	O
</s>
<s>
The	O
system	O
is	O
almost	O
always	O
found	O
in	O
conical	B-Algorithm
scanning	I-Algorithm
systems	O
.	O
</s>
<s>
To	O
perform	O
conical	B-Algorithm
scanning	I-Algorithm
,	O
either	O
the	O
disk	O
or	O
the	O
entire	O
feed	O
can	O
be	O
rotated	O
.	O
</s>
<s>
Cutler	B-Algorithm
feeds	I-Algorithm
were	O
popular	O
in	O
radars	O
from	O
the	O
1950s	O
and	O
especially	O
1960s	O
,	O
before	O
the	O
widespread	O
introduction	O
of	O
flat-plate	O
phased	O
array	O
antennas	O
.	O
</s>
