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________ is a three-port microwave device that can be lossless and matched at all spots.

________ is a three-port microwave device that can be lossless and matched at all spots. Correct Answer Circulator

A circulator is a three-port microwave device that can be lossless and matched at all ports; by using the unitary properties of scattering matrix it is proved that such a device must be non-reciprocal.

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A lossless reciprocal 3 port network can be matched at all the three ports.