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This paper presents a study characterizing the connection repeatability and reflection coefficient of submillimeter waveguide flanges in the 500–750 GHz band (WR-1.5 or WM-380). The connection repeatability of four types of flange was measured using one-port measurements and a “load-reference” technique with a vertically mounted system to mitigate gravitational bias. To measure the error-corrected...
Dimensional tolerances of waveguide flanges impose a major limitation on precise measurements above ∼100 GHz. At present, the P1785 working group of the IEEE is considering several improved flange designs for rectangular waveguides used above 110 GHz. This paper presents a study of the connection repeatability of some competing designs with worst-case dimensions. Measurements are performed in the...
Existing waveguide flanges impose a major limitation on measurement precision above ≃100 GHz. A ring-centered waveguide flange was proposed in and its electrical performance characterized in the WR-5 band. This paper explores an improved ring-centered waveguide flange which is backward compatible with the original UG-387 flange and with all its known variants, and facilitates standard TRL VNA calibration...
Waveguide flanges pose a major limitation to precise measurements above 110 GHz. This paper describes measurements on a new flange which is compatible with the standard UG-387 waveguide interface (MIL-DTL-3922/67C) but which offers significant improvement in alignment and repeatability. The ring-centered flange has a precisely machined boss centered on the waveguide aperture. The bosses of a mated...
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