Equivalent Circuit Analysis of Ridge-Loaded Folded-Waveguide Slow-Wave Structures for Millimeter-Wave Traveling-Wave Tubes

Yan, Huan; Xu, Jin; Yin, Hairong; Wei, Yanyu; Yue, Lingna; Zhao, Guoqing; Gong, Yubin

doi:10.2528/pier12042602

Cited by 16 publications

(8 citation statements)

References 22 publications

(32 reference statements)

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“…The high frequency properties of this structure were calculated by the equivalent circuit method which is developed to analyze dispersion characteristics and interaction impedance of the FWG-SWS by our group [12,18,19]. For comparison, we also simulated the structure using a 3-D electromagnetic code, HSSS [20].…”

Section: Radio-frequency Characteristicsmentioning

confidence: 99%

Study of High Efficiency Novel Folded Waveguide Traveling-Wave Tube With Sheet Electron Beam

Yan¹,

Xu²,

Wang³

et al. 2013

PIER

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Abstract-A novel double-ridge loaded folded waveguide (FWG) traveling-wave tube (TWT) amplifier for sheet electron beam working at 140 GHz is proposed in this paper. The dispersion relation and interaction impedance characteristics have been analyzed based on the equivalent circuit method. The transmission properties and nonlinear interaction are investigated. The simulation results reveal that the double-ridge loaded FWG-TWT with sheet electron beam can make full use of relatively large electronic fields, and the average output power can be over 110 W at 140 GHz when the electron beam voltage and the current of the sheet beam are set to 12.7 kV and 150 mA, respectively. Meanwhile, the maximum gain and interaction efficiency can reach 34 dB and 12%, respectively. Compared with the traditional FWG-TWT, the novel FWG-TWT has the advantages of much higher efficiency and bigger output power.

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Section: Radio-frequency Characteristicsmentioning

confidence: 99%

Study of High Efficiency Novel Folded Waveguide Traveling-Wave Tube With Sheet Electron Beam

Yan¹,

Xu²,

Wang³

et al. 2013

PIER

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“…Although various components have been developed for THz applications [5][6][7][8][9][10][11][12][13][14][15][16][17][18], high power, low cost, and compact THz sources are not readily available [19]. With the rapid advancement of multi-physics based codes, which provide the possibility of simulating the nonlinear beam-wave interaction dynamics [20][21][22][23][24], extending the operating frequency of the existing microwave tube designs [25][26][27][28][29] has become a promising approach for developing compact and powerful THz sources [30][31][32][33][34][35][36]. In accordance with this approach, design and numerical simulations of a 140 GHz spatial-harmonic magnetron (SHM) with a maximum pulse-output power of about 11 kW is presented in this paper.…”

Section: Introductionmentioning

confidence: 99%

DESIGN AND 3-D PARTICLE-IN-CELL SIMULATION OF A 140 GHz SPATIAL-HARMONIC MAGNETRON

Esfahani¹,

Tayarani²,

Schunemann³

2013

PIER

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Abstract-This paper discusses design procedure and 3-D numerical simulation of a 140 GHz spatial-harmonic magnetron (SHM). The well known scaling laws and an approximate approach based on single harmonic analysis are used to determine the interaction space dimensions and the optimum geometrical parameters of the side resonators. Numerical simulations of the SHM were performed using CST-Particle Studio. Since the simulations are not based on artificial RF priming or assuming restrictive assumptions on the mode of operation or on the number of harmonics to be considered, electromagnetic oscillations grow naturally from noise. The presented SHM shows stable operation in the π/2 − 1-mode at 140 GHz over a range of DC anode voltages extending from 11.3 kV to 11.5 kV and for an axial magnetic flux density equal to 0.79 T. Output power of the SHM varies from 2 kW to 11 kW over these voltages with a maximum efficiency of about 6.8%.

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“…Millimeter-wave radiation sources with high power, wide-bandwidth, and high efficiency are attractive for many applications, such as high-date-rate communications, high-resolution radar, and space applications [1][2][3][4][5][6][7][8]. Helix TWT is one of the most important millimeterwave vacuum amplifiers due to its outstanding combined performances in bandwidth, power capacity, and electronic efficiency.…”

Section: Introductionmentioning

confidence: 99%

A Novel Slotted Helix Slow-Wave Structure for Millimeter-Wave Traveling-Wave Tube

Liu¹,

Wei²,

Xu³

et al. 2013

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Abstract-A novel slotted helix slow-wave structure (SWS) is proposed to develop high power, wide-bandwidth, high reliability millimeter-wave traveling-wave tube (TWT). This structure, which can improve the heat dissipation capability of the helix SWS, evolves from conventional helix SWS with three parallel rows of rectangular slots made in the outside of the helix. In this paper, thermal stress analysis, the electromagnetic characteristics and the beam-wave interaction of this structure are investigated. The conclusions of this paper will be a great help for the design of millimeter-wave traveling-wave tube.

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Equivalent Circuit Analysis of Ridge-Loaded Folded-Waveguide Slow-Wave Structures for Millimeter-Wave Traveling-Wave Tubes

Cited by 16 publications

References 22 publications

Study of High Efficiency Novel Folded Waveguide Traveling-Wave Tube With Sheet Electron Beam

Study of High Efficiency Novel Folded Waveguide Traveling-Wave Tube With Sheet Electron Beam

DESIGN AND 3-D PARTICLE-IN-CELL SIMULATION OF A 140 GHz SPATIAL-HARMONIC MAGNETRON

A Novel Slotted Helix Slow-Wave Structure for Millimeter-Wave Traveling-Wave Tube

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