Reflection Coefficients of Offset Rectangular Waveguides at 56 GHz

Measurements have been made at 56.2 GHz of reflection coefficients at the junction of two sections of 0.074- by 0.148-in rectangular waveguide, which are offset in the E or H plane. Special precautions were taken to preserve identical internal dimensions of the two sections at the junction. A special fixture was built to allow controlled offset movements. The experimental data show good agreement with theoretical calculations. This data was obtained with the object of setting tolerances on waveguide alignment for acceptable reflections at waveguide flange junctions in rectangular waveguide at millimeter wave frequencies.