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

T. Otsuka, S. Adachi, M. Hattori, Y. Sakurai, O. Tajima

Research output: Contribution to journalReview articlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)7678-7685
Number of pages8
JournalApplied Optics
Volume60
Issue number25
DOIs
Publication statusPublished - Sep 1 2021
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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