High-speed high-power traveling-wave distributed photodetectors with backward wave cancellation

2003 ◽  
Author(s):  
Sanjeev Murthy ◽  
S. J. Kim ◽  
T. Jung ◽  
Z. Wang ◽  
Wei Hsin ◽  
...  
Keyword(s):  
High Power ◽  
Traveling Wave ◽  
High Speed ◽  
Backward Wave

High-speed and high-power performances of LTG-GaAs based metal-semiconductor-metal traveling-wave-photodetectors in 1.3-/spl mu/m wavelength regime

2002 ◽  
Vol 14 (3) ◽  
pp. 363-365 ◽  
Author(s):  
Jin-Wei Shi ◽  
Yen-Hung Chen ◽  
Kian-Giap Gan ◽  
Yi-Jen Chiu ◽  
Chi-Kuang Sun ◽  
...  
Keyword(s):  
High Power ◽  
Traveling Wave ◽  
High Speed ◽  
Metal Semiconductor Metal

scholarly journals Backward-wave oscillation in high power broadband helical traveling wave tube

2010 ◽  
Vol 59 (8) ◽  
pp. 5439
Author(s):  
Hu Yu-Lu ◽  
Yang Zhong-Hai ◽  
Li Bin ◽  
Li Jian-Qing ◽  
Huang Tao ◽  
...  
Keyword(s):  
High Power ◽  
Traveling Wave ◽  
Traveling Wave Tube ◽  
Wave Tube ◽  
Wave Oscillation ◽  
Backward Wave

High-power, high-speed, low-temperature-grown GaAs p-i-n traveling-wave photodetector

1998 ◽  
Author(s):  
Yi-Jen Chiu ◽  
S.B. Fleischer ◽  
J.E. Bowers ◽  
A.C. Gossard ◽  
U.K. Mishra
Keyword(s):  
Low Temperature ◽  
High Power ◽  
Traveling Wave ◽  
High Speed ◽  
Low Temperature Grown Gaas

Performance analysis of magnetic gear with Halbach array for high power and high speed

2020 ◽  
Vol 64 (1-4) ◽  
pp. 959-967
Author(s):  
Se-Yeong Kim ◽  
Tae-Woo Lee ◽  
Yon-Do Chun ◽  
Do-Kwan Hong
Keyword(s):  
Permanent Magnet ◽  
Eddy Current ◽  
High Power ◽  
High Speed ◽  
Torque Ripple ◽  
Eddy Current Loss ◽  
Element Analysis ◽  
Current Loss ◽  
Halbach Array ◽  
Magnetic Gear

In this study, we propose a non-contact 80 kW, 60,000 rpm coaxial magnetic gear (CMG) model for high speed and high power applications. Two models with the same power but different radial and axial sizes were optimized using response surface methodology. Both models employed a Halbach array to increase torque. Also, an edge fillet was applied to the radial magnetized permanent magnet to reduce torque ripple, and an axial gap was applied to the permanent magnet with a radial gap to reduce eddy current loss. The models were analyzed using 2-D and 3-D finite element analysis. The torque, torque ripple and eddy current loss were compared in both models according to the materials used, including Sm2Co17, NdFeBs (N42SH, N48SH). Also, the structural stability of the pole piece structure was investigated by forced vibration analysis. Critical speed results from rotordynamics analysis are also presented.

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