一种3D打印的宽带毫米波吸收器。

A 3D-printed broadband millimeter wave absorber.

作者信息

Petroff Matthew, Appel John, Rostem Karwan, Bennett Charles L, Eimer Joseph, Marriage Tobias, Ramirez Joshua, Wollack Edward J

机构信息

Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA.

Code 665, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.

出版信息

Rev Sci Instrum. 2019 Feb;90(2):024701. doi: 10.1063/1.5050781.

DOI:10.1063/1.5050781

PMID:30831757

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 3D printer out of a carbon-loaded high impact polystyrene filament and is designed using a space-filling curve to optimize manufacturability using the 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 telescopes, and the absorber has been shown to survive cryogenic thermal cycling.

摘要

我们展示了一种3D打印宽带渐变折射率毫米波吸收器的设计、制造技术和特性。该吸收器是使用熔丝制造3D打印机，由含碳高抗冲聚苯乙烯长丝通过增材制造而成，并采用空间填充曲线进行设计，以优化上述工艺的可制造性。该吸收器的反射率在63吉赫兹至115吉赫兹以及140吉赫兹至215吉赫兹范围内进行测量，并与电磁模拟结果进行比较。其预期应用是用于消除宇宙微波背景望远镜中的杂散光，并且该吸收器已被证明能够经受住低温热循环。