面向空间应用的3D打印宽带滤波器  

3D printed broadband filters for D space applications

作　　者：张恒 贾蓉蓉 袁建荣 邵兆申[1] 白静 崔万照[1] ZHANG Heng;JIA Rongrong;YUAN Jianrong;SHAO Zhaoshen;BAI Jing;CUI Wanzhao(China Academy of Space Technology(Xi'an),Xi'an Shaanxi 710100,China;Xi'an Space Engine Company Limited,Xi'an Shaanxi 710100,China)

机构地区：[1]中国空间技术研究院西安分院,陕西西安710100 [2]西安航天发动机有限公司,陕西西安710100

出　　处：《太赫兹科学与电子信息学报》2024年第7期741-747,共7页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家自然科学基金面上资助项目(12175176)。

摘　　要：针对卫星有效载荷技术小型化、集成化的发展需求,以及大功率、低无源互调等空间应用的瓶颈问题,本文基于3D打印一体化成型的技术特点和滤波器综合理论,提出一种易于3D打印的TE101模波导滤波器设计方法。设计了一款Ka频段的波导滤波器并采用3D打印技术进行加工,整个滤波器结构一体化成型,实测与仿真结果一致性良好;重量为同尺寸传统螺钉紧固方案的70%;滤波器的回波损耗优于22 dB,带内插损优于0.3 dB,电镀前的等效Q值约为1100。仿真结果表明,此滤波器具有单模工作带宽、功率容量大等特点;同时滤波器结构适用3D打印实现一体成型,免于装配和调试,避免了传统滤波器腔体与盖板连接引起的非线性接触。实测滤波器的无源互调电平低于-130 dBm,验证了3D打印技术实现滤波器加工的准确性和可实现性,对3D打印宽带滤波器集成化设计和工程化应用具有非常重要的指导意义。In response to the development needs of miniaturization and integration of satellite payload technology,as well as the bottleneck issues of high power and low passive intermodulation in space applications,this paper proposes a design method for a TE101 mode waveguide filter that is easy to 3D print,based on the characteristics of integrated forming technology of 3D printing and filter synthesis theory.A waveguide filter in the Ka band was designed and processed using 3D printing technology,with the entire filter structure formed in one piece.The measured and simulated results are in good agreement;the weight is 70%of that of the traditional screw fastening scheme of the same size;the filter's return loss is better than 22 dB,the in-band insertion loss is better than 0.3 dB,and the equivalent Q value before plating is about 1100.Simulation results show that this filter has characteristics such as single-mode operation bandwidth and large power capacity;at the same time,the filter structure is suitable for integrated forming by 3D printing,eliminating the need for assembly and adjustment,and avoiding the nonlinear contact caused by the connection between the traditional filter cavity and the cover plate.The measured passive intermodulation level of the filter is lower than-130 dBm,which verifies the accuracy and feasibility of 3D printing technology for filter processing.It is of great significance for the integrated design and engineering application of 3D printed broadband filters.

关 键 词：无源互调 滤波器 3D打印 大功率 非线性 一体化 

分 类 号：TN713[电子电信—电路与系统]