Theoretical and experimental study of a 0.85-THz tunable folded waveguide regenerative-feedback vacuum-electronics oscillator

doi:10.11972/j.issn.1001-9014.2020.03.003

Home > Archive>Volume 39, Issue 3, 2020 >284-289. DOI:10.11972/j.issn.1001-9014.2020.03.003

Theoretical and experimental study of a 0.85-THz tunable folded waveguide regenerative-feedback vacuum-electronics oscillator
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                        10.11972/j.issn.1001-9014.2020.03.003
                    
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                        LI Tian-Yi1LI Tian-Yi
National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing100015, China
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PAN Pan1PAN Pan
National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing100015, China
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MENG Wei-Si1MENG Wei-Si
National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing100015, China
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LI Dong1LI Dong
National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing100015, China
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CAI Jun1CAI Jun
National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing100015, China
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Wu Xian-Ping1Wu Xian-Ping
National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing100015, China
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FENG Jin-Jun1FENG Jin-Jun
National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing100015, China
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YAN Tie-Chang1YAN Tie-Chang
National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing100015, China
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Affiliation:National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing 100015, China
Clc Number:TN124
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Abstract:

A tunable feedback oscillator for 850GHz terahertz wave imaging system is proposed. The use of a folded waveguide as the slow-wave structure permits the superior performance together with the capability of UV-LIGA process. The comparison of dispersion character of FWG designed and optimized using eigenmode solver in CST Microwave Studio, respectively applied in regenerative feedback oscillator and traveling wave tube shows the key factor of tunable frequency centered at 850GHz. Additionally, a feedback circuit including T-joint structure with lossy metal is simulated and the design, including SWS and feedback circuit, is verified by 3-D particle-in-cell simulations. On varying the beam voltage, the frequency-adjustable oscillation changes from a stale single-frequency state at the beginning to multi-frequency spectra, demonstrating more than 200mW output power.

Key words:regenerative feedback oscillator;terahertz;folded waveguide;PIC solver

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LI Tian-Yi, PAN Pan, MENG Wei-Si, LI Dong, CAI Jun, Wu Xian-Ping, FENG Jin-Jun, YAN Tie-Chang. Theoretical and experimental study of a 0.85-THz tunable folded waveguide regenerative-feedback vacuum-electronics oscillator[J]. Journal of Infrared and Millimeter Waves,2020,39(3):284~289

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Received:October 22,2019
Revised:March 24,2020
Adopted:November 25,2019
Online: March 24,2020
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