W波段全带宽TE_(10)-TE_(20)模式转换器的研制  

Development of W-band Full Bandwidth TE_(10)-TE_(20)Mode Converter

作　　者：赵芸 顾浩 闫玉涛 李升 丁江乔 ZHAO Yun;GU Hao;YAN Yutao;LI Sheng;DING Jiangqiao(School of Electronic and Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China;State Key Laboratory of Space Microwave Technology,Xi′an Branch,China Academy of Space Technology,Xi′an 710100,China)

机构地区：[1]南京信息工程大学电子与信息工程学院,南京210044 [2]中国空间技术研究院西安分院空间微波技术国家级重点实验室,西安710100

出　　处：《微波学报》2024年第2期90-95,共6页Journal of Microwaves

基　　金：国家自然科学基金(12003011);空间微波技术国家级重点实验室稳定支持基金(No.HTKJ2022KL504002)。

摘　　要：新一代W波段慢波结构行波管对波导TE_(10)-TE_(n0)模式转换器的低损耗、宽带、转换效率等高性能方面提出了要求。文中重点研究一款全W波段波导模式转换器的设计,实现E面TE_(10)输入到H面TE_(20)输出的模式转换,并结合高效率转换结构,给出实际性能验证。首先,分析了波导TE_(n0)模分布特点,提出E面功分结构、集成扭波导结构及H面反相合成等单元结构;其次,给出TE_(10)-TE_(20)模式转换整体方案设计与电路优化;最后,结合H面异相功分结构集成,基于计算机数控技术,实现该W波段模式转换模块的制备,并完成三端口性能测试。实测结果表明,W波段全带宽内(75 GHz~110 GHz),该TE_(10)-TE_(20)模式转换模块输出端口功率分配比为-3.2 dB±0.2 dB,相位差为180°±2°,输入端口回波损耗优于-20 dB,且实测性能均与仿真结果高度一致,验证了W波段宽带TE_(10)-TE_(20)模式转换器的高效率、低损耗、可行性及鲁棒性。The next generation of W-band slow wave structure traveling wave tube has driven great demands of waveguide TE_(10)-TE_(n0)mode converter with high performance of low loss,wide bandwidth,conversion efficiency.In this paper a mode converter of E-plane TE_(10)to H-plane TE_(20)working on the full W-band is developed.In order to verify the mode converter performance,a transformation structure with high efficiency is also adopted.Firstly,the characteristic of TE_(n0)mode distribution in the waveguide is analyzed.The E-plane power divider,the waveguide twist and the out-of-phase power combiner are proposed and integrated.Secondly,the overall scheme of such TE_(10)-TE_(20)mode conversion is optimized.Finally,this structure is integrated with H-plane out-of-phase power combiner to realize the measurement.This W-band module is fabricated based on CNC technology and measured with three ports.The measurement results,which are agree well with the simulation,show that this module has achieved power distribution ratio of-3.2 dB±0.2 dB,phase difference of 180°±2°,and the return loss is better than-20 dB within the full W-band.The above results verify the high efficiency,low loss,feasibility and robustness of W-band wideband TE_(10)-TE_(20)mode converter.

关 键 词：模式转换器 W波段 波导 低损耗 扭波导 

分 类 号：TN814[电子电信—信息与通信工程]