Theory and Simulation of Arbitrarily Shaped Groove Staggered Double Grating Array Waveguide

Xie, Wenqiu; Wang, Zicheng; Luo, Jirun; Liu, Qinglun

doi:10.1109/ted.2014.2298396

Cited by 14 publications

(7 citation statements)

References 20 publications

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“…Although the sine corrugated waveguide can present hybrid modes (fast-wave and slow-wave) as proven in ref. [13], the relationships between the fast-/slow-wave and the depth and period of the SCCR still need to be studied. The slow-wave properties can be obtained usually by analysing the one-cell unit of the SCCR (Figure 1a).…”

Section: Sine Corrugated Cavity Resonator Analysismentioning

confidence: 99%

“…The sine corrugated waveguides (SCW) could present outstanding slow-wave features and high power capacity, which have been used to design travelling wave tubes in refs. [11][12][13]. Hence, it is intuitive to imagine that the SCW is also suitable for designing compact wideband millimetre-wave antennas, but the related reports are rarely few [14].…”

Section: Introductionmentioning

confidence: 99%

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3D metal printed slot antenna array with high gain and enhanced bandwidth using triple‐mode sine corrugated cavity resonator

Rao,

Nai,

Vaitukaitis

et al. 2023

IET Microwaves Antenna & Prop

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This letter proposes a class of sine corrugated cavity resonators (SCCR). The SCCR can present slow‐wave features and provide dual‐mode (TE104 and TE105) wideband responses with reasonable sine period and depth. Based on it, a compact high‐gain bandwidth‐enhanced SCCR slot antenna array is designed. The high gain is obtained with seven radiation slots and the wideband is achieved due to three modes being utilised. The three modes include the modes of TE104 and TE105 of the SCCR and one feed slot mode. Compared with published works, the desired TE104 and TE105 can be obtained straightforwardly based on SCCR. The standard WR62 waveguide is utilised to feed the antenna. For validation, direct metal 3D printing technology is used to fabricate it with aluminium and copper powders as a comparison. Both measured results were discussed and showed a good agreement with the simulated ones.

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Section: Sine Corrugated Cavity Resonator Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

3D metal printed slot antenna array with high gain and enhanced bandwidth using triple‐mode sine corrugated cavity resonator

Rao,

Nai,

Vaitukaitis

et al. 2023

IET Microwaves Antenna & Prop

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“…Using the geometrical parameters as given in Table 1, the model calculates the dispersion and impedance characteristics of SDV-SWS over the full band for the first space harmonic of the forward wave. The determinant matrix equation (Equation 29of [7]) is used for the dispersion curve. The average value of the interaction impedance across the beam is calculated using (Equation (30) of [7]).…”

Section: Model B -Electrical Parameter Analysismentioning

confidence: 99%

“…The determinant matrix equation (Equation 29of [7]) is used for the dispersion curve. The average value of the interaction impedance across the beam is calculated using (Equation (30) of [7]). Figure 3 shows the dispersion curve (normalized phase velocity) and interaction impedance (averaged over the beam cross-section) curve of the +1-space harmonic of the forward wave for the 0.22-THz TWT, which are found almost similar to that of [8].…”

Section: Model B -Electrical Parameter Analysismentioning

confidence: 99%

Integrated Model for Design of SWS and Beam-Wave Interaction Analysis of a Planar THZ Sheet-Beam TWT

Bansal¹,

Srivastava²,

Gupta³

2019

PIER M

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A computationally efficient, integrated, and dynamic model has been developed for the design of a planar Slow Wave Structure (SWS) and beam-wave interaction analysis of a planar THz Traveling Wave Tube (TWT) with sheet beam. A Staggered Double Vane-Slow Wave Structure (SDV-SWS) is used for its numerous advantages over other types of SWSs. The integrated model determines RF performance of a planar TWT directly from the given beam voltage and center frequency by performing three different tasks, (i) determining geometrical parameters of an SDV-SWS of maximum possible bandwidth and high interaction impedance, (ii) determining RF circuit parameters of an SDV-SWS, and (iii) performing beam-wave interaction analysis of a planar TWT. The model was developed by adopting a numerically computing environment, MATLAB. Also, highly accurate numerical techniques with double precision were used, e.g., Sixth Order Runge Kutta Method was used for electron beam dynamic. The model was used to design and simulate a 0.22 THz Sheet Beam TWT of 100 W output power. The energy balance factor was achieved within ±0.001% over a very wide dynamic range from even 100 dB below saturation to more than 10 dB above saturation. The power growth of the forward wave achieves exactly 1 dB/dB. The program is fast enough for interactive use on a standard computer with a basic configuration. The model has been compared with the published works using a 3D electromagnetic field simulator for demonstrating its accuracy.

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“…It should be noted that the SMA model is not so accurate for describing the high frequency characteristics of sine waveguide SWSs. 10,11 Xie et al 12 proposed a theoretical model in which the profile of the sine groove is approximately replaced by a series of rectangular steps. This method brings in extra calculation burden.…”

Section: Introductionmentioning

confidence: 99%

Full-wave analysis of the high frequency characteristics of the sine waveguide slow-wave structure

et al. 2017

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A selection rule for transitions in PT-symmetric quantum theory AIP Advances 7, 085001 (2017); 10.1063/1.4991032Multi-tests for pore structure characterization-A case study using lamprophyre AIP Advances 7, 085204 (2017) A theoretical model for calculation of the high frequency characteristics of the sine waveguide slow-wave structure (SWS) is proposed. The formulas of dispersion and interaction impedances of the hybrid modes are obtained by combining the Helmholtz equation with the appropriate boundary conditions. Using the full wave analysis method, it is proved that the periodic structures with a half-period shift followed leads to a pairwise closing of passbands characteristic of adjacent mode. The sine waveguide SWS for 0.22THz traveling wave tube (TWT) is chosen as an illustrative example to verify the validity of the theoretical model, and the calculation results of the dispersion curve and interaction impedance curve are consistent with the HFSS simulation results. In addition, the influences of dimensions of sine waveguide on the high frequency characteristics of +1 st spatial harmonic wave are investigated by numerical calculation. The study indicates that the appropriate SWS parameters are helpful for improving the bandwidth and increasing output power of TWT.

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Theory and Simulation of Arbitrarily Shaped Groove Staggered Double Grating Array Waveguide

Cited by 14 publications

References 20 publications

3D metal printed slot antenna array with high gain and enhanced bandwidth using triple‐mode sine corrugated cavity resonator

3D metal printed slot antenna array with high gain and enhanced bandwidth using triple‐mode sine corrugated cavity resonator

Integrated Model for Design of SWS and Beam-Wave Interaction Analysis of a Planar THZ Sheet-Beam TWT

Full-wave analysis of the high frequency characteristics of the sine waveguide slow-wave structure

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