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Linear permanent magnet vernier machine (LPMVM) has the feature of high thrust density at low speed, which make it a suitable solution for direct-drive applications [1], such as pumps and linear servo system.
Summary form only given: Demands in plasma diagnostics, radiotherapy, medical research and advanced communications have in recent years resulted in the development of new radiation sources in the terahertz region (0.1 to 10 THz). A klystron is one attractive choice for generation of THz radiation due to its operation mechanism, efficiency and robustness and because its structure is amenable to being...
Summary form only given. Terahertz radiation, which ranges from 0.1 THz to 10 THz, has received substantial interests in recent years. The conventional vacuum electronics technology has the potential to supply high enough powers to underpin many exciting and emerging THz applications. Klystrons have been designed to generate THz radiation. This vacuum device requires a very small sized RF circuit...
We report an advanced InP/InGaAs double heterojunction bipolar transistor technology using aggressive scaling in device layout and epitaxial stack. The device employs a 220 Aring highly doped base and a 1200 Aring collector designed to support current densities in excess of 12 mA/mum2. Transistors with emitter width of 0.25-mum have exhibited simultaneous measured fT and fmax frequencies in the...
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