300GHz折叠波导行波管高频结构的设计与测试
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摘要
由于折叠波导具有全金属结构、功率容量大、易集成等特点,非常适合在太赫兹频段推广应用。本文针对300GHz折叠波导行波管进行设计并加工。文中主要对工作频率在300GHz附近的折叠波导的色散特性、耦合阻抗、损耗特性及其折叠波导行波管的注-波互作用进行研究和仿真。在电压为18.4kV、电流为8mA、功率为5mW、频率范围在301～308GHz、周期数为200时,该行波管的增益约为20dB。对该折叠波导进行加工,通过矢量网络分析仪测得折叠波导成品S参数,验证了加工技术和装配方式。
The folded waveguide can be applied into THz band because of enormous advantage,such as all-metal construction,higher power capacity and ease of integration.In this paper,we design and process a 300 GHz traveling wave tube(TWT)adopting a folded waveguide structure.We mainly study and simulate the dispersion characteristics,the coupling impedance,the loss characteristics and the beam-wave interaction of the folded waveguide traveling wave tube.The gain of TWT is about 20 dB under the voltage of 18.4 kV,the current of 8 mA,the input power of 5 mW during the frequency range of 301～308 GHz with the circuit period number of 200.We manufacture the folded waveguide and measure its S-parameter by vector network analyzer to evaluate the fabrication technology and assembly method.
The folded waveguide can be applied into THz band because of enormous advantage,such as all-metal construction,higher power capacity and ease of integration.In this paper,we design and process a 300 GHz traveling wave tube(TWT)adopting a folded waveguide structure.We mainly study and simulate the dispersion characteristics,the coupling impedance,the loss characteristics and the beam-wave interaction of the folded waveguide traveling wave tube.The gain of TWT is about 20 dB under the voltage of 18.4 kV,the current of 8 mA,the input power of 5 mW during the frequency range of 301～308 GHz with the circuit period number of 200.We manufacture the folded waveguide and measure its S-parameter by vector network analyzer to evaluate the fabrication technology and assembly method.
引文
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[2]Cai Yingwu,Yang Chen,Zeng Genghua,et al.Experimental Research on High Resolution Terahertz Radar Imaging[J].High Power Laser&Particle Beams,2012,24(1):7-9.
[3]张健,邓贤进,王成,等.太赫兹高速无线通信:体制、技术与验证系统[J].太赫兹科学与电子信息学报,2014,12(1):1-13.
[4]余小游,李仁发,余方,等.太赫兹(THz)技术及其在深空探测中的应用[C].中国宇航学会深空探测技术专业委员会学术年会,2008.
[5]王文祥,宫玉彬,魏彦玉,等.大功率行波管新型慢波线技术的进展[J].真空电子技术,2002,(6):13-18.
[6]李宇.应用于微波管的双开槽叶片加载慢波结构的研究[D].济南:山东大学,2007.
[7]王健.行波管慢波结构冷测系统的研究[D].成都:电子科技大学,2006.
[8]Dohler G,Gagne D,Gallagher D,et al.Serpentine Waveguide TWT[C].Electron Devices Meeting,1987International IEEE,1987:485-488.
[9]Na Y H,Sang W C,Jin J C.Analysis of a Broadband QBand Folded Waveguide Traveling-Wavetube[J].IEEETransactions on Plasma Science,2002,30(3):1017-1023.
[10]Booske J H,Converse M C,Kory C L,et al.Accurate Parametric Modeling of Folded Waveguide Circuits for Millimeter-Wave Traveling Wave Tubes[J].IEEETransactions on Electron Devices,2005,52(5):685-694.
[11]Aumalikova M N,Timchenko N A,Kuznetsov S I,et al.Manufacturing of Regular Microstructures by Methods of LIGA-Technologies[C].International Forum on Strategic Technology IEEE,2012:1-4.