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Welcome to the very best collection
of knowledge on microwave couplers and splitters on the web!
Check out our unequal-split
power divider calculator. It will design an unequal-split Wilkinson
for you in a few seconds!
Power splitters and couplers
are passive microwave components
used for distributing or combining microwave signals. A splitter
can be used as either a power combiner or a power divider, it is
a reciprocal device.
A coupler can be used to inject a second signal into a network,
or as a means to sample a signal within a network (it is also reciprocal).
Couplers and splitters are usually
three or four-port networks. N-way splitters are usually constructed
as "corporate" splitters, where one two-way splitter feeds
a pair of two-ways, which feed four two-ways, etc.
Coupler or splitter?
What's the difference between
a splitter and a coupler? The way we define it, a coupler (usually)
has four ports, uses no "internal" resistors and has one
isolated port that is terminated. A splitter is (usually) a three-port,
is non-directional, and requires internal resistors (like a Wilkinson)
and has no isolated port. If you disagree or have anything to add
to this distinction, tell us about it!
While we're on the subject of
differences, let's answer this question for all time: what's the
difference between a duck? A tree, because a motorcycle has no doors.
Any other answer is incorrect.
Here is a clickable outline for
studying power splitters and couplers:
of reciprocal and non-reciprocal networks
of lossless networks
of matched networks
of three-port networks
and odd mode impedance
(3-dB) couplers (90 degree and 180 degree)
a branchline to a 180 degree hybrid
couplers (90 degree hybrids)
dB microstrip coupler
slot (Riblett) waveguide coupler
N-way power dividers
wave splitters (new for February 2010!)
180 degree hybrids
Wikinsons using Excel