A 3D-printed broadband millimeter wave absorber

Abstract

We present the design, manufacturing technique, and characterization of a 3D-printed broadband graded index millimeter wave absorber. The absorber is additively manufactured using a fused filament fabrication (FFF) 3D printer out of a carbon-loaded high impact polystyrene (HIPS) filament and is designed using a space-filling curve to optimize manufacturability using said process. The absorber's reflectivity is measured from 63 GHz to 115 GHz and from 140 GHz to 215 GHz and is compared to electromagnetic simulations. The intended application is for terminating stray light in Cosmic Microwave Background (CMB) telescopes, and the absorber has been shown to survive cryogenic thermal cycling.

6 pages, 6 figures, 2 tables, accepted to Review of Scientific Instruments

References in corpus (2)

• The Cosmology Large Angular Scale Surveyor
• A Compact Cryogenic Thermal Source for Detector Array Characterization

Cited by in corpus (7)

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• Thin flexible multi-octave metamaterial absorber for millimetre wavelengths
• Development of epoxy-based millimeter absorber with expanded polystyrenes and carbon black
• Planar near-field measurements of specular and diffuse reflection of millimeter-wave absorbers