Single part microwave filters made from selective laser melting
Single part microwave filters made from selective laser melting
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由选择性激光熔化制成的单件式微波过滤器
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
C. Ernst
中科院分区：
文献类型：
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作者：
J. Lorente;M. M. Mendoza;Axel Zafra Petersson;L. Pambaguian;Alejandro Álvarez Melcón;C. Ernst
本文介绍了使用一种被称为选择性激光熔化（SLM）的创新制造技术制造的波导滤波器。设计了两种分数带宽为0.9%的五度窄带直接耦合腔滤波器，作为该技术在射频应用中的首次评估。两种设计都具有相同的频率响应，但内部波导几何形状不同。基线设计由矩形空腔截面和矩形感应虹膜组成。对于第二种设计，利用了新的几何自由度，并使用了腔和虹膜整形技术来帮助减少损失。总共用铝合金和钛制造了三套过滤器。介绍了原料滤光片、抛光滤光片和镀银滤光片的Q测量结果。研究发现，如果进行表面处理，可以达到70%或更高的过滤器Q效率。此外，据报道，采用腔和虹膜整形可以将有效滤波器谐振器的q值提高至少15%。
This paper presents waveguide filters manufactured using an innovative manufacturing technique known as Selective Laser Melting (SLM). Two types of narrowband direct coupled cavity filters of fifth degree with a fractional bandwidth of 0.9% have been designed as a first evaluation of this technology for RF application. Both designs have the same frequency response but different internal waveguide geometries. The baseline design consists of rectangular cavity cross sections and rectangular inductive irises. For the second design the new geometry freedom was exploited and cavity and iris shaping techniques have been used to help minimize losses. Altogether, three sets of filters have been fabricated from aluminium alloy and titanium. Q measurement results of the filters made from the raw material, polished and silver plated are presented. It is found that high filter Q efficiency in the order of 70% or more can be achieved if a surface treatment is applied. In addition, the cavity and iris shaping employed, is reported to improve the effective filter resonator Qs over the baseline by at least 15%.