Before revision: A magic T consisting of four rectangular waveguides meeting in a single three-dimensional junction A magic tee (or magic T or hybrid tee) is a hybrid or 3 dB coupler used in microwave systems.
After revision: A magic T consisting of four rectangular waveguides meeting in a single three-dimensional junction A magic tee (or magic T or hybrid tee) is a hybrid coil|hybrid or Power coupler used in microwave systems.