Bibliografías temáticas / Microwave Tube (MWT)

Literatura académica sobre el tema "Microwave Tube (MWT)"

Autor: Grafiati
Publicado: 6 de septiembre de 2023

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Artículos de revistas sobre el tema "Microwave Tube (MWT)"

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Xiong, Xiaohong, Tao Jiang, Wenhao Qi, Jun Zuo, Meiling Yang, Qiang Fei, Saijin Xiao, Aimin Yu, Zhiqiang Zhu y Huanwen Chen. "Some Rare Earth Elements Analysis by Microwave Plasma Torch Coupled with the Linear Ion Trap Mass Spectrometry". International Journal of Analytical Chemistry 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/156509.

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A sensitive mass spectrometric analysis method based on the microwave plasma technique is developed for the fast detection of trace rare earth elements (REEs) in aqueous solution. The plasma was produced from a microwave plasma torch (MPT) under atmospheric pressure and was used as ambient ion source of a linear ion trap mass spectrometer (LTQ). Water samples were directly pneumatically nebulized to flow into the plasma through the central tube of MPT. For some REEs, the generated composite ions were detected in both positive and negative ion modes and further characterized in tandem mass spectrometry. Under the optimized conditions, the limit of detection (LOD) was at the level 0.1 ng/mL using MS2procedure in negative mode. A single REE analysis can be completed within 2~3 minutes with the relative standard deviation ranging between 2.4% and 21.2% (six repeated measurements) for the 5 experimental runs. Moreover, the recovery rates of these REEs are between the range of 97.6%–122.1%. Two real samples have also been analyzed, including well and orange juice. These experimental data demonstrated that this method is a useful tool for the field analysis of REEs in water and can be used as an alternative supplement of ICP-MS.
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Lo Gerfo, Fabio Paolo y Patrizia Livreri. "Optimal Design of an X-Band, Fully-Coaxial, Easily-Tunable Broadband Power Equalizer for a Microwave Power Module". Electronics 9, n.º 5 (18 de mayo de 2020): 829. http://dx.doi.org/10.3390/electronics9050829.

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A microwave power module (MPM), which is a hybrid combination of a solid-state power amplifier (SSPA) as a driver and a traveling-wave tube amplifier (TWT) as the final high power stage, is a high-power device largely used for radar applications. A gain equalizer is often required to flatten the TWT output power gain owing to its big gain fluctuations over the operating frequency range. In this paper, the design of an X-band, fully-coaxial, easily-tunable broadband power equalizer for an MPM is presented. The structure is composed of a coaxial waveguide as the main transmission line and a coaxial cavity loaded with absorbing material as a resonant unit. Sensitivity analyses of the attenuation amplitude and resonant frequency of the equalizer in terms of coaxial cavity length, thickness of the absorbing disc, and insertion depth of the probe were carried out. The measured results were in good agreement with the simulated ones, showing that the equalization curve met the requirements well and proved that this optimal structure has the advantages of a large power capacity, a wide operating frequency band, is easily tunable, and good transmission performance.
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Tesis sobre el tema "Microwave Tube (MWT)"

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Joshi, T. G. Subhash. "Power Electronic Technologies for Medium and High Power High Voltage Power Supplies". Thesis, 2017. http://etd.iisc.ac.in/handle/2005/4322.

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The performance of systems used in various high voltage applications depend majorly on the output voltage ripple of High Voltage Power Supplies (HVPS). One of the failure mode of microwave tube (MWT) commonly used in these applications is due to the energy accumulation above the specified limit during fault events due to higher stored energy in HVPS. This demands either a protection for MWT or reduced ripple voltage without increasing the stored energy. This thesis investigates a protection device for MWT that operate with MW power level HVPS, and design method to reduce the output voltage ripple for medium power HVPS. A crowbar is an energy diverting device connected in parallel with the MWT. It protects the tube during fault by providing an alternative path for the ow of energy. Conventional crowbars are built using either mercury or nitrogen gas-based switches. Due to the environmental concern and higher operational cost, the state-of-the-art is to replace these devices with semiconductor devices, referred to as solid state crowbar (SSC). This research, models and designs the subcomponents of an SSC, including: (i) Modelling of fault current, and a fuse wire that is used to emulate a MWT during internal arc (ii) Design of di=dt limiting inductor (iii) Design of static and dynamic voltage balancing network for the thyristor (iv) Mechanical assembly design that ensures meeting the required crowbar electrical characteristics (v) Selection of cost-effective semiconductor device for crowbar application (vi) Thermal modelling of crowbar for pulse power applications (vii) Selection of cable for the pulse power application. In a switched converter topology, the causes of output voltage ripple are: the switch action, input dc ripple, and variations in the load. In this thesis the influence of input voltage ripple on the output dc voltage, called Audio Susceptibility (AS), is discussed. AS of load resonant converters has not been widely studied in literature. This research uses exact discretization method to obtain: (i) The analytical large signal and cyclic steady state model of the Series Resonant Converter (SRC) considering the resonant tank and output filter states (ii) The analytical small signal AS model of the SRC, and resonant gain condition for input ripple (iii) The design of an SRC for superior AS performance (iv) A comparison of SRC design for (a) superior AS performance and (b) maximum power transfer capability (v) A selection of SRC components including the high voltage high frequency magnetics and selection of the MosFET. All the modelling and design method considered in this work has been verified by experimental studies on two 10MW, 10kV peak power SSC and a 10kW, 10kV SRC that has been fabricated as a part of the research.
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Actas de conferencias sobre el tema "Microwave Tube (MWT)"

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"TU3E: Digital Microwave Architectures". En 2007 IEEE/MTT-S International Microwave Symposium. IEEE, 2007. http://dx.doi.org/10.1109/mwsym.2007.380221.

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2

Barroso, Joaquim J. "Modeling transit-time microwave tubes". En 2007 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. IEEE, 2007. http://dx.doi.org/10.1109/imoc.2007.4404267.

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3

True, Richard. "The evolution of microwave and millimeter wave tubes". En 2012 IEEE/MTT-S International Microwave Symposium - MTT 2012. IEEE, 2012. http://dx.doi.org/10.1109/mwsym.2012.6258249.

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4

Sen, Bulent, Mehmet Kayhan, Hakan Boran y Necati Bilgin. "1,25 kW S band pulsed Transmit/Receive module for microwave tube amplifier replacement". En 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. IEEE, 2011. http://dx.doi.org/10.1109/mwsym.2011.5972798.

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5

Sen, B., M. Kayhan, H. Boran y N. Bilgin. "1,25 kW S band pulsed Transmit/Receive module for microwave tube amplifier replacement". En 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. IEEE, 2011. http://dx.doi.org/10.1109/mwsym.2011.5973443.

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6

Lin, Meng-Hsuan, Shi-Meng Yang, Chia-Chan Chang y Sheng-Fuh Chang. "Tube Positioning System Designed for Nasogastric Intubation". En 2023 IEEE/MTT-S International Microwave Symposium - IMS 2023. IEEE, 2023. http://dx.doi.org/10.1109/ims37964.2023.10188184.

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7

Di Bella, Francis A. y Jonathan Gwiazda. "A New Concept for a Thermal Air Power Tube Used With Concentrated Solar Energy Power Generation in Open-Pit Mines and Large Natural Geo-Physical Phenomenon". En International Joint Power Generation Conference collocated with TurboExpo 2003. ASMEDC, 2003. http://dx.doi.org/10.1115/ijpgc2003-40071.

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This paper reviews a novel power generation system that improves the overall efficiency of concentrated solar energy systems while also providing for the cost effective reclamation and utilization of a man-made geo-physical phenomenon: decommissioned, open pit mines. A preliminary feasibility will be presented of an integrated system consisting of a concentrated solar energy powered Rankine Cycle system and the authors’ novel (patent pending) energy recovery system that consists of a thermally induced, pneumatic (wind turbine) power tube system (Pneumatic Power Tube) that is designed with reflective surfaces for concentrating solar energy. The proposed system is unique in the field of power generation using renewable/natural resources while also providing a solution to the reclamation and utilization of depleted open pit mines. The paper presents a parametric feasibility study of the proposed system installed for a range of “small” and “large” open-pit mines, such as the Palabora copper open pit mine located in South Africa. Using state-of-the-art specifications for power generation from concentrated solar energy systems based on D.O.E. supported research, a average size integrated installations could generate approx. 700–750 Mwe with 12–18 Mwe contributed by the new Pneumatic Power Pit Tubes. The enhancements include a unique design for a pneumatic power tube that combines the functions of solar collector/reflector with a hot air “chimney” air diffuser and wind power generation. A schematic of the proposed integrated system is also provided. The paper also presents a summary of the major technical benefits of the proposed system including the synergisms between the proposed renewable energy system and the application of DOE’s microwave power generation and transmission as well as the societal benefits of reclaiming land areas that are otherwise not suitable for habitation. Suggestions will also be made as to the application of authors’ pneumatic wind turbine power tubes to other large, naturally occurring geo-physical phenomenon.
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8

Tkadlec, Roman y Giuseppe Macchiarella. "Pseudoelliptic Combline Filter in a Circularly Shaped Tube". En 2018 IEEE/MTT-S International Microwave Symposium - IMS 2018. IEEE, 2018. http://dx.doi.org/10.1109/mwsym.2018.8439446.

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9

Qiu, J. X., D. K. Abe, T. M. Antonsen, B. G. Danly, B. Levush y R. E. Myers. "Efficient Operation of Traveling-Wave Tube Amplifier with Dynamically Adjusted Collector Bias Voltages". En 2007 IEEE/MTT-S International Microwave Symposium. IEEE, 2007. http://dx.doi.org/10.1109/mwsym.2007.380423.

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10

Simons, R. N., D. A. Force, P. C. Spitsen, W. L. Menninger, N. R. Robbins, D. R. Dibb y P. C. Todd. "High-efficiency K-band space traveling-wave tube amplifier for near-earth high data rate communications". En 2010 IEEE/MTT-S International Microwave Symposium - MTT 2010. IEEE, 2010. http://dx.doi.org/10.1109/mwsym.2010.5516163.

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