<s>
A	O
slow-wave	B-Algorithm
coupler	I-Algorithm
is	O
a	O
directional	O
coupler	O
consisting	O
of	O
microstrip	O
lines	O
in	O
which	O
there	O
is	O
a	O
corrugation	O
in	O
the	O
inner	O
edges	O
of	O
the	O
transmission	O
lines	O
where	O
the	O
coupling	O
takes	O
place	O
.	O
</s>
