A5058272714- Gyrotron and Vacuum Electronics Research
- Microwave Engineering and Waveguides
- Pulsed Power Technology Applications
- Photonic and Optical Devices
- Terahertz technology and applications
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Advanced Photonic Communication Systems
- Millimeter-Wave Propagation and Modeling
- Acoustic Wave Resonator Technologies
- Optical Coatings and Gratings
- Electromagnetic Launch and Propulsion Technology
- Superconducting Materials and Applications
- Metamaterials and Metasurfaces Applications
- Superconducting and THz Device Technology
- Antenna Design and Analysis
- Radio Frequency Integrated Circuit Design
- Advanced Antenna and Metasurface Technologies
Shenzhen University
2023-2025
Institute of Microelectronics
2023
The design and cold test verification for a 220-GHz sheet beam traveling-wave tube (SB-TWT) are presented in this article. Although there numerous studies regarding the simulation of SB-TWTs, most them focus on research one or several component(s) SB-TWT. And, beam–wave interaction simulations generally based ideal situations, example, an electron focusing magnetic field. In order to improve accuracy predictions, two measures have been implemented study: 1) cosimulation entire is carried...
In comparison to single-sheet electron beam devices, the output power of multiple-sheet devices is hopeful be significantly enhanced due increased current. One most important issues restricting development generation and stable transmission beams. this article, design two dual-sheet-beam optic systems (EOSs) with significant features long distance high current density presented. Additionally, both them have achieved a compression factor large aspect ratio. To verify design, uniform permanent...
A novel design methodology of a TE <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$^{\mathrm {\circ }}_{21}$ </tex-math></inline-formula> /TE }}_{01}$ mode converter for gyrotron traveling-wave tubes (gyro-TWTs) is presented in this article. This type characterized by its broad bandwidth. The proposed consists two-mode conversion sections (TE {\pmb }}}_{10}$ –TE }}}_{20}$ and ) an overmoded coupling...
In this paper, the design and simulation of a tunable periodic cusped magnet-quadrupolar magnet (PCM-QM) focusing system for 220 GHz sheet beam traveling-wave tube (SB-TWT) is presented. Simulation results show that 0.1 A, 30 kV electron with cross-sectional size <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathbf{0.6} \mathbf{mm} \times \mathbf{0.1}\ \mathbf{mm}$</tex> can be transported smoothly through 75 mm-long drift tunnel...
The sheet beam electron gun is one of the most important parts a traveling wave tube (SB-TWT). In this paper, 220 GHz designed and optimized by using CST. Simulation results show that current 0.1 A with voltage 30 kV, size at waist about 0.6 mm * 0.12 mm. can be used to construct tubes.
In this paper, the design of a 340 GHz pillbox window is presented. The chosen as input/output structure, because its simple good welding technology, wide frequency band, and high power capacity, which has been widely used in various types vacuum electron devices. material output sapphire with features mechanical strength, relatively low dielectric constant, nontoxicity. initial parameters are determined by equivalent theories, then simulated optimized CST-MWS (Microwave Studio). Simulation...
A novel rectangular TE10 to TEn0 ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$n=2, 3, 4, \ldots $ </tex-math></inline-formula> ) mode converter based on an notation="LaTeX">$E$ -plane Y-shaped branch waveguide power dividing network is proposed in this article. To obtain the desired high-order mode, signal observed at output end of each adjacent designed possess property equal amplitude and reversed...
In this paper, a novel ultra-wideband elliptical bowtie antenna with depressed bias is presented for the THz vacuum photomixer. The proposed obtains broad frequency bandwidth of 0.2-2 port reflection <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\vert S_{11}\vert$</tex> lower than -10 dB and smoothly varied radiation resistance an average value ~60Ω. Under collimation by extended hemispherical lens, its gain covers range 7.0-16.7 dBi within...