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Effect of electron beam energy spread and emittance on the output performances from subterahertz overmoded surface wave oscillator (SWO) are numerically investigated in this paper by using a particle-in-cell (PIC) code added beam quality model. The 2.5D simulation results show that, the small energy spread and emittance have few influences on the device, while the axial mode competition appears with...
A rectangularly corrugated relativistic slow-wave oscillator is designed to generate the MW-level 0.34 THz wave radiation. By using large overmoded ratio the manufacturing difficulty is efficiently decreased, while relativistic hollow thin-wall electron beam is adopted to suppress the mode competition. Simulations based on a 2.5-D particle-in-cell (PIC) code UNIPIC predict an output power up to 131MW...
This manuscript presents a double-sided flat-type permanent magnetic linear energy harvester to scavenge kinetic power from linear motions. The dynamic system model of the linear generator is analytically driven and analyzed by an innovative state-based approach. The analytical equations on maximum power generation specific for non-resonant applications such as human foot motion are derived. Both...
This paper presents an unconventional flat-type linear permanent magnetic generator based energy harvesting system which employs a cascaded boost-buck two-stage converter, with a maximum power control algorithm optimized for low frequency human horizontal foot motion, for Li-Ion battery charging. The dynamic model of the linear generator is built and the analytical equations for maximum power generation...
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