Production Method of Millimeter-Wave Absorber with 3D-Printed Mold
arXiv:2001.00517 · doi:10.1063/1.5132871
Abstract
We established a production method of a good millimeter-wave absorber by using a 3D-printed mold. The mold has a periodic pyramid shape, and an absorptive material is filled into the mold. This shape reduces the surface reflection. The 3D-printed mold is made from a transparent material in the millimeter-wave range. Therefore, unmolding is not necessary. A significant benefit of this production method is easy prototyping with various shapes and various absorptive materials. We produced a test model and used a two-component epoxy encapsulant as the absorptive material. The test model achieved a low reflectance: at 100 GHz. The absorber is sometimes maintained at a low temperature condition for cases in which superconducting detectors are used. Therefore, cryogenic performance is required in terms of a mechanical strength for the thermal cycles, an adhesive strength, and a sufficient thermal conductivity. We confirmed the test-model strength by immersing the model into a liquid-nitrogen bath.
arXiv comment3 pages, 8 figures
References in corpus (7)
- The Atacama Cosmology Telescope: The polarization-sensitive ACTPol instrument
- BICEP2 II: Experiment and Three-Year Data Set
- The ARCADE 2 Instrument
- A 3D-printed broadband millimeter wave absorber
- POLARBEAR-2: an instrument for CMB polarization measurements
- Development of Multi-Fourier Transform interferometer :Fundamental
- A Compact Cryogenic Thermal Source for Detector Array Characterization
Cited by in corpus (4)
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- Thin flexible multi-octave metamaterial absorber for millimetre wavelengths
- Planar near-field measurements of specular and diffuse reflection of millimeter-wave absorbers
- Optimization procedure of the baffle of the GroundBIRD Telescope to mitigate stray light