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| Isolator is an element used in microwave or optical wave transmission
circuits. To put it shortly, it is a passive element that fixes
the direction of power flow to a single direction. Basic function
of the isolator is to remove the galvanic path among input,
output and power, which is called a three-way isolator. |
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The isolator that separates
electrical signals of input and output using the buffer device
in the midway is an essential element in communication parts.
It solves several impacts of small amount of surge, noise, grounding
and power.
Therefore, if an isolator is located in the middle of a signal
path, power is transmitted to one way but not to the other way.
In such a way, the isolator fixes the direction of power flow
and rejects signals going to the other way. |
| As shown in the above figure, the isolator should have three
ports in it: an input port, an output port, and an isolation
port that bypasses signals coming in from the output port so
that they may not return to the input port. The isolator operation
is illustrated in the following figure: |
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