Wave dispersion measurements of helically corrugated waveguides using a Vector Network Analyser

使用矢量网络分析仪测量螺旋波纹波导的波色散

• 批准号: EP/D500842/1
• 负责人: Alan Phelps
• 金额: $ 27.11万
• 依托单位: University of Strathclyde
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FD500842%2F1
• 关键词: Wave; dispersion; measurements; helically; corrugated

Gyrotron travelling wave amplifiers, oscillators and microwave pulse compressors based on helically corrugated waveguides have been developed at the University of Strathclyde at X-band Frequencies (8.2GHz to 12.4GHz). This proposal intends to study the use of helically corrugated waveguides to investigate the scalability of this concept to higher Ka-band (26.5GHz to 40GHz) and W-band (75GHz to 110GHz) frequencies. Two substantial problems immediately present themselves as one looks to increase the frequency, namely the requirements to fabricate an adequately accurate profile with a sufficiently smooth surface to produce the required dispersive properties with a tolerable loss. At the lower Xband frequencies hitherto investigated CNC mills have been used to produce the required 3D surface, but at higher frequencies the proportionately reduced tolerances plus the reduced clearances for tool access will prohibit this technique. The project will therefore investigate the alternative fabrication techniques available, including hydraulic and mechanical forming, electroforming, casting and spark erosion, all combined with electropolishing and thin surface plating. The fabricated waveguide sections will be measured by a Vector Network Analyser (VNA). The VNA will be used to measure the wave dispersion of helical structures by comparing the evolution of the principle value of the phase angle of the radiation as a function of frequency as it propagates through a known length of the waveguide. Measurements of the wave dispersion of amplifier and oscillator interaction regions and helical compressor sections will be benchmarked and compared with the predictions of theory and modelling.

基于螺旋波纹波导的回旋行波管放大器、振荡器和微波脉冲压缩器已在斯特拉斯克莱德大学研制成功，工作频率为8.2GHz至12.4GHz。该提案旨在研究螺旋波纹波导的使用，以调查该概念在更高的Ka波段（26.5GHz至40GHz）和W波段（75GHz至110GHz）频率上的可扩展性。当人们希望增加频率时，两个实质性问题立即出现，即需要制造具有足够光滑表面的足够精确的轮廓，以产生具有可容忍损耗的所需色散特性。在较低的X波段频率下，迄今为止研究的CNC米尔斯已被用于生产所需的3D表面，但在较高的频率下，公差的比例减小加上工具访问的间隙减小将禁止这种技术。因此，该项目将研究可用的替代制造技术，包括液压和机械成型、电铸、铸造和电火花腐蚀，所有这些都与电抛光和薄表面电镀相结合。制作的波导部分将通过矢量网络分析仪（VNA）进行测量。VNA将用于测量螺旋结构的波色散，通过比较作为频率的函数的辐射的相位角的主值的演变，因为它通过波导的已知长度传播。放大器和振荡器的相互作用区域和螺旋压缩机部分的波的色散的测量将基准和理论和建模的预测进行比较。

项目成果

Simulations of Ka-band waveguide components for use in a gyro-travelling wave amplifier

用于陀螺行波放大器的 Ka 波段波导元件的仿真

• 作者: Craig Roberston (Author)

Experimental results on microwave pulse compression using helically corrugated waveguide

螺旋波纹波导微波脉冲压缩实验结果

• DOI: 10.1063/1.3482024
• 发表时间: 2010
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: McStravick M

Helically corrugated waveguides for compression of frequency swept pulses

用于压缩扫频脉冲的螺旋波纹波导

• 作者: Philip MacInnes (Author)

5-fold helically corrugated waveguide dispersion measurements

5 倍螺旋波纹波导色散测量

• 作者: Michael McStravick (Author)

Generation of 3 GW microwave pulses in X-band from a combination of a relativistic backward-wave oscillator and a helical-waveguide compressor

• DOI: 10.1063/1.3505825
• 发表时间: 2010-11
• 期刊: Physics of Plasmas
• 影响因子: 2.2
• 作者: V. Bratman;G. Denisov;N. G. Kolganov;S. Mishakin;S. Samsonov;A. Cross;Wenlong He;Liang Zhang;M. McStravick;C. Whyte;A. Young;K. Ronald;C. Robertson;A. Phelps