On the Development of Metal 3D Printed Bandpass Filter With Wide Stopband Based on Deformed Elliptical Cavity Resonator With an Additional Plate
On the Development of Metal 3D Printed Bandpass Filter With Wide Stopband Based on Deformed Elliptical Cavity Resonator With an Additional Plate
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DOI：
10.1109/access.2022.3147822
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发表时间：
2022
期刊：
影响因子：
3.9
通讯作者：
Povilas Vaitukaitis;K. Nai;Jiayu Rao;Jiasheng Hong
中科院分区：
文献类型：
--
作者：
Povilas Vaitukaitis;K. Nai;Jiayu Rao;Jiasheng Hong
本文提出了一种新开发的金属 3D 打印波导带通滤波器，基于带有附加板的改进变形椭圆腔谐振器。改进的谐振器具有出色的设计自由度，允许对中心频率、带宽和传输零点进行半独立控制。此外，传输零点可以放置在距离通带较近和较远的位置，以分别提高频率选择性以及阻带宽度和抑制。给出了谐振器的理论、带有示例的滤波器设计以及经过广泛讨论的模拟和实验结果。作为概念验证，使用选择性激光熔化（一种金属 3D 打印技术）设计和制造了 5 极 Ku 波段宽带滤波器。尽管原型是在完工后进行测试的，即没有任何表面后处理，但所有四个打印原型之间的模拟和测量结果具有良好的一致性和一致性。此外，原型机是一体式制造的，与之前的两件式原型机相比，显着改善了测量结果。
This paper presents a newly developed metal 3D printed waveguide bandpass filter based on a modified deformed elliptical cavity resonator with an additional plate. The modified resonator has excellent design freedom allowing semi-independent control of centre frequency, bandwidth, and transmission zeros. Furthermore, transmission zeros can be placed close and far from the passband to improve frequency selectivity and stopband’s width and rejection, respectively. Theory of the resonator, filter design with an example, and simulated and experimental results with extensive discussion are given. As proof of concept, a 5-pole Ku-band wideband filter was designed and manufactured using Selective Laser Melting, a metal 3D printing technique. Even though the prototypes were tested as-built, i.e. without any surface post-processing, the simulated and measured results have good agreement and consistency between all four printed prototypes. Moreover, the prototypes were manufactured in one piece, significantly improving measured results compared to the previous two-piece prototypes.