<s>
Yttrium	B-Algorithm
iron	I-Algorithm
garnet	I-Algorithm
spheres	I-Algorithm
(	O
YIG	B-Algorithm
spheres	I-Algorithm
)	O
serve	O
as	O
magnetically	O
tunable	O
filters	O
and	O
resonators	O
for	O
microwave	O
frequencies	O
.	O
</s>
<s>
YIG	B-Algorithm
filters	I-Algorithm
are	O
used	O
for	O
their	O
high	O
Q	O
factors	O
,	O
typically	O
between	O
100	O
and	O
200	O
.	O
</s>
<s>
The	O
YIG	B-Algorithm
spheres	I-Algorithm
themselves	O
are	O
on	O
the	O
order	O
of	O
0.5mm	O
in	O
diameter	O
and	O
are	O
manufactured	O
from	O
slightly	O
larger	O
cubes	O
of	O
diced	O
material	O
by	O
tumbling	O
,	O
as	O
is	O
done	O
in	O
the	O
manufacture	O
of	O
jewelry	O
.	O
</s>
<s>
YIG	B-Algorithm
filters	I-Algorithm
usually	O
consist	O
of	O
several	O
coupled	O
stages	O
,	O
each	O
stage	O
consisting	O
of	O
a	O
sphere	O
and	O
a	O
pair	O
of	O
loops	O
.	O
</s>
<s>
YIG	B-Algorithm
filters	I-Algorithm
are	O
often	O
used	O
as	O
preselectors	O
.	O
</s>
<s>
YIG	B-Algorithm
filters	I-Algorithm
tuned	O
by	O
a	O
sweep	O
current	O
are	O
used	O
in	O
spectrum	O
analyzers	O
.	O
</s>
<s>
Another	O
YIG	O
application	O
is	O
YIG	B-Algorithm
oscillators	I-Algorithm
,	O
where	O
the	O
sphere	O
acts	O
as	O
a	O
tunable	O
frequency-determining	O
element	O
.	O
</s>
