A new concept of inner-feedback-style traveling wave tube oscillator, which is based on a traveling-wave tube having a partial reflector located at near the junction between the slow-wave structure and the output coup...A new concept of inner-feedback-style traveling wave tube oscillator, which is based on a traveling-wave tube having a partial reflector located at near the junction between the slow-wave structure and the output coupler and a mechanical tuner connected to the input coupler, is proposed. Simulations by CHIPIC code show that the inner-feedback-style traveling wave tube oscillator having 100W of power, about 10% of electron efficiency and a tunable band of 73.35-73.91 GHz may be achieved. Compared with Backward Wave Oscillators (BWOs), the new devices have similar ability for tuning, and have much higher electron efficiency, suggesting much more potential as a Terahertz source.展开更多
This paper will look further into an innovative form of providing feedback that is beginning to create a lot of interest in several countries around the world, including the USA, Japan and Spain. The idea has already ...This paper will look further into an innovative form of providing feedback that is beginning to create a lot of interest in several countries around the world, including the USA, Japan and Spain. The idea has already had national press coverage in the UK. In this research, the author will explain how screen recording software can be used to provide "video" feedback for students. The paper will outline two possible ways that video feedback can be used to provide individual feedback to students either on their written work or on the general performance of the whole class. Students have been very enthusiastic in their response to this form of providing feedback. The paper concludes by outlining possible directions for further study.展开更多
基金Supported by the National Natural Science Foundation of China (No. 61172016)
文摘A new concept of inner-feedback-style traveling wave tube oscillator, which is based on a traveling-wave tube having a partial reflector located at near the junction between the slow-wave structure and the output coupler and a mechanical tuner connected to the input coupler, is proposed. Simulations by CHIPIC code show that the inner-feedback-style traveling wave tube oscillator having 100W of power, about 10% of electron efficiency and a tunable band of 73.35-73.91 GHz may be achieved. Compared with Backward Wave Oscillators (BWOs), the new devices have similar ability for tuning, and have much higher electron efficiency, suggesting much more potential as a Terahertz source.
文摘This paper will look further into an innovative form of providing feedback that is beginning to create a lot of interest in several countries around the world, including the USA, Japan and Spain. The idea has already had national press coverage in the UK. In this research, the author will explain how screen recording software can be used to provide "video" feedback for students. The paper will outline two possible ways that video feedback can be used to provide individual feedback to students either on their written work or on the general performance of the whole class. Students have been very enthusiastic in their response to this form of providing feedback. The paper concludes by outlining possible directions for further study.
