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3‐D printed waveguide attenuators operating at ka‐band (26.5‐40 GHz )

Wang, Yi; Guo, C; Shang, X; Wu, W (2021) 3‐D printed waveguide attenuators operating at ka‐band (26.5‐40 GHz ). Microwave and Optical Technology Letters, 63 (3). pp. 775-780. ISSN 0895-2477

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In this paper, two Ka-band (26.5 40 GHz) waveguide attenuators designed for 3-D metal printing are presented. These designs are based on long waveguides with elliptical cross-sections, so that the waveguide structure can be self-supported during printing. Bended waveguide and helical waveguide are utilised by the two attenuators, respectively, to achieve reduced overall sizes. The attenuations are fixed, however these can be altered by varying the length/height of waveguides. The limitation of 3-D metal printing process on surface roughness is also used to provide attenuation. Therefore, the proposed attenuators can cope with printing process with relatively poor surface finish. The prototype designs are fabricated using a metallic selective laser melting (SLM) process and are measured to have good electrical performance across the full waveguide band. This demonstrates that 3-D metal printed attenuators could be an attractive alternative to the conventional designs based on absorbing materials, particularly for applications demanding high powers.

Item Type: Article
Subjects: Electromagnetics > RF and Microwave
Divisions: Electromagnetic & Electrochemical Technologies
Identification number/DOI: 10.1002/mop.32669
Last Modified: 11 Feb 2021 15:02
URI: http://eprintspublications.npl.co.uk/id/eprint/8967

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