Selective Laser Melting aluminum waveguide attenuation at K-band
Selective Laser Melting aluminum waveguide attenuation at K-band
复制标题
K 波段选择性激光熔化铝波导衰减
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
R. Smith
中科院分区：
文献类型：
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作者：
Michael Hollenbeck;K. Wamick;Clinton Cathey;Janos Opra;R. Smith
增材制造允许制造高效使用3D空间体积的高度复杂的结构。诸如选择性激光熔化（SLM）的现有技术的金属增材制造方法允许具有高机械强度的复杂部件，但是以波导结构的内表面上的增加的表面粗糙度为代价。本文研究了一组SLM WR42波导与标准ALSi10Mg铝粉印刷的增加的表面粗糙度的损失的贡献，并比较其衰减性能购买单件WR42波导和一个行业标准的方法，数控加工波导多件组件。RF部件的单件式结构产生的衰减低于多件式组装，并且较低的表面粗糙度直接导致较低的衰减，正如预期的那样。SLM射频波导与CNC波导相比具有更好的部件一致性和相当或更好的衰减性能，表明这种制造方法已经达到可以用于射频波导组件的程度。
Additive manufacturing allows for fabrication of highly complex structures that efficiently use a 3D volume of space. Current state of the art metal additive manufacturing methods such as Selective Laser Melting (SLM) allow for intricate parts with high mechanical strength but at the cost of increased surface roughness on internal faces of waveguide structures. This paper investigates the contribution to loss of the increased surface roughness on a set of SLM WR42 waveguides printed with a standard ALSi10Mg aluminum powder, and compares their attenuation performance to purchased single-piece WR42 waveguides and to an industry-standard method for CNC machining waveguide multi-piece assemblies. Single-piece construction of RF parts produces lower attenuation than multi-piece assembly, and lower surface roughness directly leads to lower attenuation, as expected. SLM RF waveguides had better part consistency and comparable or better attenuation performance compared to CNC waveguides, showing that this manu-facturing method has reached the point where it can be used in RF waveguide assemblies.