论文标题
用3D打印模具的毫米波吸收器的生产方法
Production Method of Millimeter-Wave Absorber with 3D-Printed Mold
论文作者
论文摘要
我们通过使用3D打印模具建立了一种良好的毫米波吸收器的生产方法。该模具具有周期性的金字塔形状，并将吸收材料填充到模具中。这种形状减少了表面反射。 3D打印的模具由毫米波范围内的透明材料制成。因此，不需要拆卸。这种生产方法的一个重要优势是具有各种形状和各种吸收材料的原型制作。我们生产了一个测试模型，并使用了两个组件的环氧树脂作为吸收材料。测试模型的反射率很低：$ \ sim 1 \％$在100 GHz时。对于使用超导检测器的病例，有时将吸收器保持在低温条件下。因此，就热循环的机械强度，粘合强度和足够的导热率而言，需要低温性能。我们通过将模型浸入液氮浴中来确认测试强度。
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: $\sim 1\%$ 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.
