A THz Backward-Wave Oscillator Based on a Double-Grating Rectangular Waveguide

Liu, Qinglun; Wang, Zicheng; Liu, Pu-Kun; Du, Chao‐Hai; Li, Haiqiang; Xu, Anyu

doi:10.1109/ted.2013.2246868

Cited by 23 publications

(5 citation statements)

References 21 publications

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“…The comparison of the conventional BWO and the QPP BWO in the THz band is shown in Table IV with the main parameters which are also from the simulation results. The sine waveguide [18], corrugated rectangular waveguide (CRWG) [29], and double-grating rectangular waveguide (DGRWG) [30] are involved in the comparison, which shows that the novel QPP BWO have higher interaction impedance and efficiency, lower operating voltage and focusing magnetic field, and shorter circuit length compared with …”

Section: Discussionmentioning

confidence: 99%

A Modified Slow-Wave Structure for Backward-Wave Oscillator Design in THz Band

Zhang

Wei

Shi

et al. 2014

IEEE Trans. THz Sci. Technol.

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In this paper, a novel slow-wave structure (SWS), called quasi-parallel-plate (QPP), is proposed for terahertz (THz) backward-wave oscillator BWO design. Compared with the conventional SWSs, the novel SWS has a wider "cold" bandwidth and higher interaction impedance. The Particle-in-cell (PIC) results show that the BWO can produce over 0.82 W output power in the operating frequency range from 0.82 to 1 THz by utilizing an operating voltage range from 5 to 10 kV. The interaction efficiency over the entire operating frequency band is above 2.8%. This SWS, which employing a circular electron beam of 3 mA, can be considered as a promising THz SWS for BWO design with characteristics of moderate operating voltage, wide tunable bandwidth, high efficiency, and compact structure.Index Terms-Backward-wave oscillator (BWO), quasi-parallelplate (QPP), slow-wave structure (SWS), terahertz (THz) source.

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Section: Discussionmentioning

confidence: 99%

A Modified Slow-Wave Structure for Backward-Wave Oscillator Design in THz Band

Zhang

Wei

Shi

et al. 2014

IEEE Trans. THz Sci. Technol.

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“…Fortunately, the higher current density electron beam can be generated by either using a high current density field emission, 23 or a pseudospark-sourced cathode, 24 or compressing electrons from a lower current density thermionic cathode. 25 Coincidently, a Pierce gun with 30 mA current and 40 lm beam radius has been designed by Liu et al 26 Thus, the high current density pencil beam is reasonable. Second, the peak electric field strength when this device operates with the 32 kV beam voltage is about 2 Â 10 6 V/m, and it does not exceed the breakdown electric field strength (0.5-3 Â 10 7 V/m) in the vacuum.…”

Section: Backward Wave Oscillator Performancementioning

confidence: 99%

Investigation of 0.38 THz backward-wave oscillator based on slotted sine waveguide and pencil electron beam

et al. 2016

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A novel backward wave oscillator (BWO) is presented by utilizing a slotted sine waveguide with a pencil electron beam to produce the high power terahertz wave. The high frequency characteristics including dispersion properties, interaction impedances, and transmission characteristics of the slotted sine waveguide are analyzed in detail. The high frequency system including the output coupler, slow wave structure (SWS), and reflector are designed properly. A 3-D particle-in-cell mode is applied to predict the device performance of the BWO based on the novel SWS. The investigation results demonstrate that this device can generate over 8.05 W output power in the frequency range of 363.4-383.8 GHz by using a 30 mA pencil electron beam and adjusting the beam voltage from 20 kV to 32 kV. V

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“…The figure shows that the particle velocity is almost constant at the middle of the electron beam tunnel, while at both ends of the tunnel (near to the conducting walls and the slow wave defects), there is a change in the velocity of the particle. This result can be explained from the location of the slow wave mode and the waveguide mode [3] [6]. Since the waveguide mode is located at the center of the SWS, there is no particle-field interaction at this region.…”

Section: B the Particle Physicsmentioning

confidence: 99%

Analysis of a novel 200GHz Cherenkov radiation based backward wave oscillator

Nashed

Chaudhuri

Safavi-Naeini

2014

2014 IEEE International Microwave and RF Conference (IMaRC)

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A novel Backward Wave Oscillator (BWO) suitable for work at millimeter Wave/THz regime, based on the Axial loaded Double Defected-Photonic Crystal (ADD-PC) Slow Wave Structure (SWS), is proposed. With the advantage of the excellent mode selectivity of the PC and the power handling capability of the metallic SWS, the ADD-PC is an ideal structure for Cherenkov radiation-based source/amplifier. The performance of the proposed BWO was investigated using a Finite Difference Time Domain (FDTD)/Particle In Cell (PIC) simulation. The numerical simulation result shows a strong agreement with the theoretical expectations. A design example, generating a 200GHz electromagnetic wave at a 50mW level is presented. Index Terms -Finite Difference Time Domain (FDTD), Particle In Cell (PIC), Photonic Crystal (PC), Backward Wave Oscillator (BWO).

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A THz Backward-Wave Oscillator Based on a Double-Grating Rectangular Waveguide

Cited by 23 publications

References 21 publications

A Modified Slow-Wave Structure for Backward-Wave Oscillator Design in THz Band

A Modified Slow-Wave Structure for Backward-Wave Oscillator Design in THz Band

Investigation of 0.38 THz backward-wave oscillator based on slotted sine waveguide and pencil electron beam

Analysis of a novel 200GHz Cherenkov radiation based backward wave oscillator

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