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A sapphire output window is designed for 108GHz folded waveguide traveling-wave tube (FW-TWT). The voltage standing wave ratio (VSWR) is calculated using CST Microwave Studio (MWS). The transmission modes in the window are analyzed. Thermal analysis of the output window using ANSYS package is presented. With different power losses in the window, temperature, total deformation and equivalent stress...
Enhance the efficiency of beam-wave interaction is an important problem in the design of folded waveguide traveling-wave tube (TWT) amplifier. A dielectric-loaded tapered folded waveguides was studied, whose equivalent circuit analysis is mainly introduced in this paper.
The paper presents a novel cascaded folded waveguide traveling wave tube (FW-TWT) interacting with two beams operating at TE20 mode. This cascaded structure is constructed by two sections. The downstairs section interacts with the two beams to amplify the signal initially. It also provides the upstairs section with small input power. The upstairs section continues to amplifying the signal. Both the...
With a growth of surveillance cameras, the amount of captured videos expands. Manually analyzing and retrieving surveillance video is labor intensive and expensive. It would be much more convenient to generate a video digest, with which we can view the video in a fast and motion-preserving way. In this paper, we propose a novel video synopsis approach to generate condensed video, which uses an object...
Microbial transglutaminase (MTG) was used to recover protein from soybean whey wastewater, based on the SDS-PAGE GE electrophoresis, single factor and orthogonal experiments, the optimum polymerization conditions of the protein in the soybean wastewater by MTG was obtained as follows: 6 mL of enzyme (1U/ml), reaction time 1 h, 35°C and pH 7. There were 4 bands with the molecular weight of 80 kD, 63...
Given an arbitrary deployment of sensor nodes, one fundamental design issue in wireless sensor networks (WSNs) is to connect the source nodes collecting sensing data to the sinks so that sensing data flows efficiently and reliably to the sinks. To facilitate such data collection, we require a path formation protocol that will determine multi-hop routes between source nodes and data sinks. We avoid...
The phenomenon of self-organization is pervasive in nature,where biological organisms efficiently self-organize unreliable and dynamically changing components to develop a wide diversity of functions. In addition, these biological organisms enjoy the desirable properties of robustness to the failure of individual components, adaptivity to changing conditions, and the lack of reliance on explicit central...
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