3D-Printed Dual-Mode Invar Channel Filters for Ku-Band Satellite Payloads

IF 6.9 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Talal Skaik;Emelia Hayward;Abd EL-Moez A. Mohamed;Moataz M. Attallah;Lu Qian;César Miquel España;Paul Booth;Yi Wang
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引用次数: 0

Abstract

This paper presents an end-to-end process of realization of channel filters for output multiplexers (OMUX) in satellite payloads. The filters are designed at 11.609 GHz using dual-mode cylindrical resonators operating at TE113 degenerate modes. Two filters were fabricated from Invar alloy, making use of its low coefficient of thermal expansions (CTE) of 1-2 ppm/K, using powder bed fusion with laser beam (PBF-LB) process. The first filter, as a reference design for comparison purpose, is comprised of four pieces assembled using screws, while the second filter was printed monolithically as one part. The paper presents various design solutions to significantly reducing the filter weight. This includes hollowed flanges and reduced wall thickness, around 0.5 mm, and using waffle structure with reinforcing ribs. The monolithic printed filter offers a weight reduction of 65% compared to the four-piece filter. Post processing techniques including vibratory grinding polishing and silver plating were applied. Both filters were tuned using tuning screws and the measurements are in good agreement with the simulated results. The RF-thermal measurements showed negligible frequency shift confirming the temperature stability for high-power operation in satellite environment.
ku波段卫星有效载荷的3d打印双模Invar通道滤波器
本文提出了一种端到端的卫星有效载荷输出多路复用器(OMUX)信道滤波器的实现过程。滤波器设计在11.609 GHz,使用双模圆柱形谐振器,工作在TE113简并模式下。利用Invar合金的热膨胀系数(CTE)为1 ~ 2 ppm/K,采用粉末床激光熔合(PBF-LB)工艺制备了两个滤光片。作为比较的参考设计,第一个过滤器由四个部分组成,使用螺钉组装,而第二个过滤器作为一个部分整体打印。本文提出了各种设计方案,以显着减少过滤器重量。这包括中空法兰和减少壁厚,约0.5毫米,并使用带有加强肋的华夫结构。与四片式过滤器相比,单片印刷过滤器的重量减轻了65%。后处理技术包括振动研磨抛光和镀银。两个滤波器都用调谐螺钉进行了调谐,测量结果与仿真结果吻合较好。射频热测量显示可忽略不计的频移,证实了卫星环境下高功率工作的温度稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
10.70
自引率
0.00%
发文量
0
审稿时长
8 weeks
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