Keyee Microwave manufactures Double Ridged Waveguide Magic Tee includes E Plane Tees, H Plane Tees, Hybrid Tees and Magic Tees covering sizes WRD84 thru WRD180. It is four-port coupler for matching, balance and isolation. E-plane to H-plane Isolation is a function of the symmetry which is carefully balanced on each unit. If the E-plane port 4 or the H-plane port 2 are used as inputs the split is on the output collinear ports 1 and 3. When the input is E plane port 4 the outputs are out of phase 180 deg. This feature is widely used in monopulse antenna feed structure and phasing testing setup.
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