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The frequency range of the millimeter wave is from 30 up to 300 GHz. Millimeter waves have been extensively studied for many applications including high resolution radars, communications, materials processing, plasma heating, high energy particle accelerators and power transmission. In this paper, an injection-locked millimeter wave oscillator based on field-emission cathodes is proposed and demonstrated...
Summary form only given. The interactions between the electrons and the terahertz waves in a field emission based terahertz generator have been studied by employing the finite-difference time-domain particle-in-cell simulations. The cathode has been trimmed to emit electrons to understand the interaction mechanism. Simulation results show that the efficiency of the case corresponding to the trimmed...
An injection-locked Ka-band oscillator based on field-emission cathodes is investigated. The phase and frequency controllability has been demonstrated by the finite-difference time-domain particle-in-cell simulations. The results show the consistency with the prediction of Adler's equation.
The millimeter wave is widely used and discussed, and there have been many inventions and applications. We proposed a new vacuum electronic device for the generation of Ka-band millimeter waves, and we use the 2D finite-difference time-domain particle-in-cell code MAGIC (developed by ATK Mission Research, VA, US) for the verification of the generation of millimeter waves. After doing fast Fourier...
In the previous meeting held at MIT (IVNC2004), we proposed a vacuum electronic device based on field emission mechanism for the generation of THz waves. A preliminary result was obtained. However, the detail interaction mechanisms were under study to improve the efficiency. In the present work, the MAGIC code is used to investigate the interactions between the electrons and the THz waves. To understand...
We proposed a vacuum electronic device based on field emission mechanism for the generation of THz waves in a previous work. The preliminary simulation results showed that an electronic efficiency up to 4% can be achieved with no external magnetic fields applied. However, the interaction mechanism is not clear. In the present work, the interaction mechanisms are studied. The MAGIC code is used to...
We study the space charge effects on thermionic emission via a self-consistent approach. The Richardson-Dushman equation, corrected for the Schottky effect and the Poisson's equation including relativistic effects are solved iteratively. The knee of the transition curve from TL to FSCL operation is obtained self-consistently
The Ka-band millimeter wave is generally discussed, and there have been many inventions and applications of it. We propose a vacuum electronic device based on field emission mechanism for the generation of Ka-band millimeter waves. The verification of the generation of millimeter waves has been done using a 2D finite-difference time-domain particle-in-cell code MAGIC (developed by MRC Co., VA, US)...
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