Magic Tee

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Magic Tee

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A compound waveguide or coaxial tee with four arms which exhibits directional characteristics, when properly matched, so that a signal entering one arm will be split between two of the other arms but not the third. A signal entering another arm is likewise split with half the energy entering one of the arms common to the other input but not its second arm and the other half of the energy entering the arm not used by the other input. </dd>
The magic tee is used in radar as a transmitter-receiver duplexer. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use