V-Shape Folded Rectangular Groove Waveguide for Millimeter-Wave Traveling-Wave Tube

Yang, Liu; Yue, Lingna; Tian, Yanyan; Xu, Jin; Wang, Wenxiang

doi:10.1109/tps.2011.2169498

Cited by 10 publications

(4 citation statements)

References 16 publications

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“…A novel slow-wave structure called V-shape folded rectangular groove waveguide is proposed to develop high power, wide bandwidth and high efficiency millimeter-wave traveling-wave tube [8], as shown in Fig. 10.…”

Section: B V-shape Folded Rectangular Groove Waveguide Twtmentioning

confidence: 99%

“…Meanwhile, as the core component of TWT amplifiers, the slow-wave structures critically determine the performances of the TWT. In order to develop the high power wideband V-band TWT, several robust full-metal slow-wave structures such as folded waveguide, double-staggered ladder line coupled-cavity, sheet-beam coupled-cavity and V-shape folded rectangular groove waveguide are investigated [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Progress on the V-band traveling-wave tube

Yang

Wei

et al. 2012

2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)

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Section: B V-shape Folded Rectangular Groove Waveguide Twtmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Progress on the V-band traveling-wave tube

Yang

Wei

et al. 2012

2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)

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“…In order to improve the performance, Liu et al proposed a V-type folded waveguide SWS and Liu et al designed a folded waveguide SWS with a drift section. In order to realize micromachining with high precision, Tueck et al obtained a folded waveguide SWS by deep reactive ion etching (DRIE), and So et al fabricated a folded waveguide SWS by the LIGA technique [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Design, fabrication and measurement of a novel 140 GHz folded waveguide based on SU-8 UV-LIGA technology

Xie

Ding

Zhao

et al. 2015

J. Micromech. Microeng.

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In an RF MEMS field, a folded waveguide is the core structure of a traveling wave tube as a slow-wave structure. 140 GHz is an important atmospheric working window. In this paper, the dispersion property and interaction impedance of a novel 140 GHz folded waveguide were analyzed and simulated using CST Microwave Studio. The beam–wave interaction in the folded waveguide was also simulated, using CST Particle Studio. The output power gain of the folded waveguide reached 24.5 dB at 140 GHz when the emission voltage was 12.7 kV and the emission current was 0.15 A. The simulation process provided structure parameters for further micromachining. Furthermore, to analyze the effect of structure fabrication errors, CST was used to simulate the dispersion and interaction impedance by adding tolerance to some important structure parameters. Finally, multi-step SU-8 UV-LIGA technology was adopted for micromachining the folded waveguide. To ensure adhesion between the SU-8 photoresist and substrate, a thin TiO2 film was formed on the surface of the Ti substrate. In the end, test results showed that the reflection coefficient S11 and transmission coefficient S21 were near −28.1 dB and −1.2 dB respectively. Moreover, the output power gain was close to 23 dB at 140 GHz. Good accordance between the simulation and experimental results indicated a reasonable design and high precision of microfabrication by SU-8 UV-LIGA technology.

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“…Also, its compatibility with planar fabrication by MEMS technologies draws an attracted attention to develop a miniaturized radiation sources. Consequently, there are great interests in studies and developments of FW SWS, for example, Sumathy et al [18] proposed a ridge-loaded FW SWS for traveling wave tube (TWT), Liu et al [19] presented a V-shape FW SWS for TWT, and Nguyen et al [11] proposed a multistage FW SWS, and so on. In addition, many novel methods are used to fabricate the FW SWS, So et al [12] employed a X-ray lithography (LIGA) to manufacture the FW SWS, Makarova [13] used a UV LIGA technology to develop the kind of SWS for 0.22-THz TWT, Bhattacharjee et al [14] finished a compact FW SWS for 0.4-THz TWT with the technology of deep reactive ion etching (DRIE), and Tucek et al [15] successfully obtained the 850-GHz FW circuit with the DRIE.…”

mentioning

confidence: 99%

Two-Section Folded-Waveguide Slow-Wave Structure for Terahertz Extended Interaction Oscillator

Liu

Zhao

et al. 2014

IEEE Trans. Electron Devices

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Extended interaction oscillator (EIO) is a promising terahertz (THz) power source, which has many potential important applications, such as military radar, medical imaging and material science research, and so on. To improve the operation performances of the THz EIO, a novel type of two-section folded waveguide (TSFW) slow wave structure (SWS) is proposed in this paper. The dispersion characteristics for TSFW obtained by an equivalent circuit model are analyzed, and the output characteristics for TSFW EIO are studied and optimized with the help of 3-D particle-in-cell simulation. Comparing with the single section of FW SWS, the remarkable enhancement of output power in the TSFW SWS is observed from 50 up to 130 W. Based on the proposal model, the TSFW is fabricated with a high speed numerical control milling machine and its transmission characteristics are tested. The results of the cold test are in agreement with theoretical predications. Index Terms-3-D particle-in-cell (PIC) simulation, extended interaction oscillator (EIO), terahertz (THz), two-section folded waveguide (TSFW) slow wave structure (SWS).

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V-Shape Folded Rectangular Groove Waveguide for Millimeter-Wave Traveling-Wave Tube

Cited by 10 publications

References 16 publications

Progress on the V-band traveling-wave tube

Progress on the V-band traveling-wave tube

Design, fabrication and measurement of a novel 140 GHz folded waveguide based on SU-8 UV-LIGA technology

Two-Section Folded-Waveguide Slow-Wave Structure for Terahertz Extended Interaction Oscillator

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