设计一种紧凑、高性能的263 GHz SB-TWT电路

2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-19 DOI:10.1109/IVEC.2016.7561898

Yuan Zheng, D. Gamzina, B. Popovic, N. Luhmann

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引用次数: 7

摘要

在美国国家科学基金会(NSF)多学科研究计划(MRI)资助下，加州大学戴维斯分校正在开发电子顺磁共振(EPR)光谱仪系统，为263 GHz片束行波管放大器(SB-TWTA)设计了一种紧凑、高性能的交错双光栅(SDG)慢波结构(SWS)电路。通过采用相位匹配扼流圈，输入/输出结构具有优异的低频边缘传输特性。采用紧凑型服务器拓宽带宽，减小电路总长度，从而有利于s参数和电子光学系统的设计。采用纳米数控铣削技术制备了该电路，并在扩散连接前测量了电路的透射和反射参数。为了延长器件的工作带宽，采用了混合模式传输药盒CVD窗口。计算机仿真技术(CST)微波工作室(MWS)结果表明，该电路在245-285 GHz范围内的最大反射损耗(S11)为-15 dB，而传输系数(S21)超过-0.5 dB。在36 GHz带宽范围内，药丸盒窗口的最大驻波比小于1.25。

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Design of a compact and high performance 263 GHz SB-TWT circuit

A compact, high performance staggered double grating (SDG) slow wave structure (SWS) circuit has been designed for a 263 GHz sheet beam traveling wave tube amplifier (SB-TWTA) for use in an electron paramagnetic resonance (EPR) spectrometer system being developed at UC Davis under National Science Foundation (NSF) Multidisciplinary Research Initiative (MRI) funding. By adopting a phase matching choke, the input/output structure exhibits superior low frequency band edge transmission characteristics. A compact sever is employed to broaden the bandwidth and reduce the overall circuit length thereby benefiting the S-parameters and the electron optical system design. The circuit was fabricated using Nano-CNC milling technology and the transmission and reflection parameters of the circuit were measured prior to diffusion bonding. In order to extend the operating bandwidth of the device, a hybrid mode transmission pill-box CVD window is employed. The Computer Simulation Technology (CST) Microwave Studio (MWS) results indicate the maximum reflection losses (S11) for the circuit over 245-285 GHz are -15 dB, while the transmission coefficient (S21) exceeds -0.5 dB. The maximum VSWR for the pill-box window within a 36 GHz bandwidth is less than 1.25.

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2016 IEEE International Vacuum Electronics Conference (IVEC)

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