Material survey for a millimeter-wave absorber using a 3D-printed mold

Radio absorptive materials (RAMs) are key elements for receivers in the millimeter-wave range. We previously established a method for production of RAM by using a 3D-printed mold. An advantage of this method is a wide range of choices for absorptive materials to be used. To take advantage of this fl...

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Published in:Applied optics (2004) 2021-09, Vol.60 (25), p.7678
Main Authors: Otsuka, T., Adachi, S., Hattori, M., Sakurai, Y., Tajima, O.
Format: Article
Language:English
Subjects:
Absorptivity
Carbon fibers
Epoxy resins
Frequency ranges
Materials selection
Millimeter waves
Molds
Three dimensional printing
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description Radio absorptive materials (RAMs) are key elements for receivers in the millimeter-wave range. We previously established a method for production of RAM by using a 3D-printed mold. An advantage of this method is a wide range of choices for absorptive materials to be used. To take advantage of this flexibility, we added a range of absorptive materials to a base epoxy resin, STYCAST-2850FT, and examined the optical performance of the resultant RAM across a wide frequency range under cryogenic conditions. We found that adding a particular type of carbon fiber produced the best performance with a reflectance at 77 K estimated as 0.01%–3% over a frequency range of 20–300 GHz.
doi_str_mv 10.1364/AO.433254
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source Optica Publishing Group Journals
subjects Absorptivity
Carbon fibers
Epoxy resins
Frequency ranges
Materials selection
Millimeter waves
Molds
Three dimensional printing
title Material survey for a millimeter-wave absorber using a 3D-printed mold
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