Skinner, J; Richardson, D; Hague, P; Ridler, N (2026) Design and RF Performance Validation of a New Miniature Rectangular Waveguide Flange for Millimeter-Wave Frequencies and Above. In: 2026 107th ARFTG Microwave Measurement Conference (ARFTG), 12 June 2026, Boston, MA, USA.

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Abstract

A new miniature flange for interconnecting millimeter- and submillimeter-wave rectangular waveguide components has recently been developed. This paper reports on the design and RF performance evaluation of the flange, designated FSM-45. A rectangular waveguide calibration kit featuring the FSM-45 flange in the WR 6.5 band (also denoted WM-1651 or D-band) was subject to metrological evaluation whereby key performance metrics, namely connection repeatability and interface reflection, were quantified. The results were compared with equivalent results, both measured and modeled, for the IEEE standardized 1785.2a flange, which is considered the current state-of-the-art. The outcomes reveal the exceptional performance of the FSM-45, and its suitability for deployment in RF technologies across the industry.

Item Type:	Conference or Workshop Item (Paper)
Keywords:	rectangular waveguide, flange, interface, vector network analyzer, repeatability reflection coefficient
Subjects:	Electromagnetics > RF and Microwave
Divisions:	Electromagnetic & Electrochemical Technologies
Publisher:	IEEE
Identification number/DOI:	10.1109/ARFTG68740.2026.11614662
Last Modified:	20 Oct 2026 13:05
URI:	https://eprintspublications.npl.co.uk/id/eprint/10571