太赫兹折叠波导慢波电路及功率合成技术研究

向怀鑫; 缪旻; 李振松; 边兴旺

doi:10.11884/HPLPB202436.240007

太赫兹折叠波导慢波电路及功率合成技术研究

doi: 10.11884/HPLPB202436.240007

向怀鑫^{1, 2, 3,},
缪旻^{1, 2, 3},
李振松^{1, 2, 3, ,},
边兴旺⁴

1.
北京信息科技大学信息产业部信息与通信系统重点实验室，北京 100101
2.
北京信息科技大学智能芯片与网络研究中心，北京 100101
3.
北京信息科技大学光电测试技术及仪器教育部重点实验室，北京 100101
4.
北京真空电子技术研究所微波电真空器件国家级重点实验室，北京 100015

详细信息

作者简介:
向怀鑫，huaixin.xiang@bistu.edu.cn

通讯作者:
李振松，lizhensong@bistu.edu.cn。

中图分类号: TN124
计量
- 文章访问数: 24
- HTML全文浏览量: 14
- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2024-01-04
- 修回日期: 2024-09-19
- 录用日期: 2024-03-10
- 网络出版日期: 2024-10-18

Research on slow-wave circuits and power synthesis techniques of folded waveguides for terahertz applications

Xiang Huaixin^{1, 2, 3
,},
Miao Min^{1, 2, 3},
Li Zhensong^{1, 2, 3
, ,},
Bian Xingwang⁴

1.
Key Laboratory of Information and Communication Systems, Ministry of information Industry, Beijing Information Science & Technology University, Beijing 100192, China
2.
Academy of Smart IC and Network, Beijing Information Science & Technology University, Beijing 100192, China
3.
Key Laboratory of the Ministry of Education for 0ptoelectronic Measurement Technology and Instrument, Beijing Information Science & Technology University, Beijing 100192, China
4.
National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing 100015, China

摘要

摘要: 针对太赫兹频段行波管输出功率较小的瓶颈以及对紧凑型设计的明确需求，提出一种管内功率合成的0.34 THz折叠波导行波管结构。首先，对太赫兹折叠波导慢波结构的高频特性进行了研究，通过仿真计算得到了其色散特性和耦合阻抗，0.34 THz处归一化相速度为0.248，耦合阻抗为0.46 Ω；其次，提出了用于管内功率合成的3 dB定向耦合器结构设计，分析表明，其在0.31～0.368 THz范围内，幅度平衡度在±0.19 dB以内，隔离度优于24 dB；最后，完成了基于3 dB定向耦合器管内功率合成的折叠波导行波管基本结构设计并构建了仿真模型，仿真结果表明，最大输出功率为9.16 W，增益为26.6 dB，3 dB带宽达到21 GHz。作为对比，单个折叠波导行波管输出功率为6.18 W，故管内合成的折叠波导行波管的输出功率是单个行波管输出功率的1.48倍；此外，与采用常规外置功率合成结构的双行波管组件设计相比，管内功率合成折叠波导行波管的横向尺寸至少缩减了56.5%。
- 太赫兹（THz） /
- 折叠波导行波管 /
- 3 dB定向耦合器 /
- 功率合成 /
- 注-波互作用
Abstract: Aiming to address the bottleneck of low output power in terahertz band traveling wave tubes and responding to the distinct demand for compact design, this paper proposes a 0.34 THz folded waveguide traveling wave tube structure with power combination inside the tube. Firstly, the high-frequency characteristics of the folded waveguide slow-wave structure are investigated. Electromagnetic full-wave simulations are used to obtain its dispersion characteristics and coupling impedance. The normalized phase velocity at 0.34 THz is 0.248 and the coupling impedance is 0.46 Ω. Secondly, a 3 dB directional coupler structure for in-tube power combination is designed. The analysis indicates that its amplitude balance is within ±0.19 dB in the range of 0.31–0.368 THz, and the isolation exceeds 24 dB. Finally, the basic structure of the folded waveguide traveling wave tube based on the in-tube combination of the 3dB directional coupler are demonstrated. The simulation model is constructed, and the results show a maximum output power of 9.16 W, a gain of 26.6 dB, and a 3 dB bandwidth of 21 GHz. For comparison, the output power of a single folded waveguide traveling wave tube is 6.18 W. The output power of the in-tube synthesized folded waveguide traveling wave tube is 1.48 times that of the single traveling wave tube. Moreover, compared with the design of a dual-tube assembly using conventional external power combination structure, the lateral size is reduced by at least 56.5%.
- terahertz /
- folded waveguide traveling-wave tube /
- 3 dB directional coupler /
- power combination /
- beam-wave interaction

HTML全文

图 1 折叠波导示意图

Figure 1. Folded waveguide diagram

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图 2 E面五分支线定向耦合器

Figure 2. E-plane five-branch directional coupler

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图 3 3 dB定向耦合器仿真结果

Figure 3. 3 dB Directional Coupler Simulation Results

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图 4 直渐变过渡波导

Figure 4. Straight tapering transition waveguide

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图 5 过渡波导S参数和电压驻波比

Figure 5. 5 Transition waveguide S-parameters and VSWR

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图 6 功率合成折叠波导行波管

Figure 6. Power combination Folded Waveguide Travelling Wave Tube

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图 7 频率与输出功率图

Figure 7. Frequency vs output power

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图 8 管外折叠波导行波管功率合成图

Figure 8. Out-of-tube folded waveguide travelling wave tube power combination diagram

下载: 全尺寸图片幻灯片

图 9 功率合成折叠波导行波管图

Figure 9. Power combination folded waveguide travelling wave tube diagrams

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表 1 慢波结构参数

Table 1. Structure parameters of slow wave structure Unit：mm

a b p h r

0.56 0.12 0.18 0.20 0.08

下载: 导出CSV

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