Investigation of High Frequency Noise and Power in AlGaN/GaN HEMTs

2007 ◽  
Author(s):  
P. Sakalas ◽  
M. Schroter ◽  
H. Xing ◽  
D. Jena ◽  
J. Simon ◽  
...  
Keyword(s):  
High Frequency ◽  
Frequency Noise ◽  
High Frequency Noise ◽  
Gan Hemts

High Frequency Noise in GaN HEMTs

2009 ◽  
Author(s):  
J. Mateos ◽  
S. Pérez ◽  
D. Pardo ◽  
T. González ◽  
Massimo Macucci ◽  
...  
Keyword(s):  
High Frequency ◽  
Frequency Noise ◽  
High Frequency Noise ◽  
Gan Hemts

Thermal Study of the High-Frequency Noise in GaN HEMTs

2009 ◽  
Vol 57 (1) ◽  
pp. 19-26 ◽  
Author(s):  
M. Thorsell ◽  
K. Andersson ◽  
M. Fagerlind ◽  
M. Sudow ◽  
P.-A. Nilsson ◽  
...  
Keyword(s):  
High Frequency ◽  
Thermal Study ◽  
Frequency Noise ◽  
High Frequency Noise ◽  
Gan Hemts

High Frequency Noise Model of AlGaN/GaN HEMTs

2017 ◽  
Vol 6 (11) ◽  
pp. S3072-S3077 ◽  
Author(s):  
Shuman Mao ◽  
Yuehang Xu ◽  
Yongbo Chen ◽  
Wenli Fu ◽  
Xiaodong Zhao ◽  
...  
Keyword(s):  
High Frequency ◽  
Noise Model ◽  
Frequency Noise ◽  
High Frequency Noise ◽  
Gan Hemts

Case study: Simulation and control of high frequency noise for commercial vehicle cab considering leak

2019 ◽  
Vol 67 (4) ◽  
pp. 315-329
Author(s):  
Rongjiang Tang ◽  
Zhe Tong ◽  
Weiguang Zheng ◽  
Shenfang Li ◽  
Li Huang
Keyword(s):  
High Frequency ◽  
Commercial Vehicle ◽  
Frequency Noise ◽  
High Frequency Noise ◽  
Simulation And Control ◽  
And Control

Aerodynamic noise from an asymmetric airfoil with perforated extension plates at the trailing edge

2020 ◽  
pp. 1475472X2097838
Author(s):  
CK Sumesh ◽  
TJS Jothi
Keyword(s):  
High Frequency ◽  
Sound Pressure ◽  
Pore Diameter ◽  
Low Frequency ◽  
Aerodynamic Noise ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Trailing Edge ◽  
High Frequency Noise ◽  
Displacement Thickness

This paper investigates the noise emissions from NACA 6412 asymmetric airfoil with different perforated extension plates at the trailing edge. The length of the extension plate is 10 mm, and the pore diameters ( D) considered for the study are in the range of 0.689 to 1.665 mm. The experiments are carried out in the flow velocity ( U∞) range of 20 to 45 m/s, and geometric angles of attack ( αg) values of −10° to +10°. Perforated extensions have an overwhelming response in reducing the low frequency noise (<1.5 kHz), and a reduction of up to 6 dB is observed with an increase in the pore diameter. Contrastingly, the higher frequency noise (>4 kHz) is observed to increase with an increase in the pore diameter. The dominant reduction in the low frequency noise for perforated model airfoils is within the Strouhal number (based on the displacement thickness) of 0.11. The overall sound pressure levels of perforated model airfoils are observed to reduce by a maximum of 2 dB compared to the base airfoil. Finally, by varying the geometric angle of attack from −10° to +10°, the lower frequency noise is seen to increase, while the high frequency noise is observed to decrease.

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