低损耗太赫兹波导腔体传输结构与互联接口设计技术  

Low-loss terahertz waveguide cavity transmission structure and interconnection interface design technology

作　　者：张博[1] 张勇[1] ZHANG Bo;ZHANG Yong(School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]电子科技大学电子科学与工程学院,成都611731

出　　处：《空间电子技术》2024年第4期77-85,共9页Space Electronic Technology

基　　金：微波毫米波单片集成和模块电路重点实验室开放基金项目(编号:61428032204)。

摘　　要：文章介绍了降低太赫兹波导传输和互联损耗的方法及实验结果。当前,矩形波导多采用金属分块技术制作,且H面剖分波导损耗明显高于E面剖分波导损耗。为了抑制H面波导的电磁泄漏和辐射损耗,降低整体的传输损耗,在波导剖分表面添加了电磁带隙结构或扼流槽结构。采用传统的数控铣削和金属分块技术制备了一些波导样品,包括常规的矩形波导、带隙波导和扼流波导,并在170GHz~260GHz频段进行了测量和损耗对比。实验结果表明,在太赫兹频率下,波导分裂带来的不连续间隙使常规的H面波导损耗高达0.074dB/mm;带隙波导的损耗为0.017dB/mm,但加工耗时且价格昂贵;扼流波导的损耗为0.025dB/mm,成本和性能适中。此外,还设计制备了基于零形扼流槽的波导法兰,用于无接触低损耗太赫兹波导互联应用。相比常规波导法兰,基于文章设计的法兰互联性能稳定,改善效果显著。The paper introduces the methods and experimental results for reducing the transmission and interconnection losses of terahertz waveguides.At present,rectangular waveguides are mostly fabricated by split metal-block technology,and the loss of waveguides in H-plane splitting is obviously higher than that in E-plane splitting.To suppress electromagnetic leakage and reduce the H-plane waveguide loss,electromagnetic band gap structures or choke groove structures are added on the waveguide splitting surface.Using the traditional CNC milling and metal-block techniques,some specially designed waveguide samples,including the conventional rectangular waveguide,the gap waveguide and the choke waveguide,were fabricated and measured in the 170GHz~260GHz band.The experimental results show that the conventional H-plane waveguide loss is 0.074dB/mm at terahertz frequency due to the discontinuous gap caused by waveguide splitting.The gap waveguide loss is 0.017dB/mm,but the processing is time-consuming and expensive.The choke waveguide loss is 0.025dB/mm,and the cost and performance are moderate.In addition,a waveguide flange based on the zero-shaped choke groove is also designed and fabricated for contactless and low-loss terahertz waveguide interconnection applications.Compared with conventional waveguide flanges,the flanges designed in this paper have stable performance and remarkable improvement effect.

关 键 词：低损耗H面波导 矩形波导 太赫兹 波导扼流 波导互联 

分 类 号：TN454[电子电信—微电子学与固体电子学] V443[航空宇航科学与技术—飞行器设计]