STUDY OF FIELD INDUCED HOT-ELECTRON EMISSION USING THE COMPOSITE MICROEMITTERS WITH VARYING DIELECTRIC LAYER THICKNESS

1987 ◽  
Vol 48 (C6) ◽  
pp. C6-115-C6-120 ◽  
Author(s):  
M. S. Mousa
Open Physics ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 927-934
Author(s):  
Tao Song ◽  
Chao Liu ◽  
Hengxuan Zhu ◽  
Min Zeng ◽  
Jin Wang

Abstract Normal operation of gas turbines will be affected by deposition on turbine blades from particles mixed in fuels. This research shows that it is difficult to monitor the mass of the particles deposition on the wall surface in real time. With development of electronic technology, the antenna made of printed circuit board (PCB) has been widely used in many industrial fields. Microstrip antenna is first proposed for monitoring particles deposition to analyse the deposition law of the particles accumulated on the wall. The simulation software Computer Simulation Technology Microwave Studio (CST MWS) 2015 is used to conduct the optimization design of the PCB substrate antenna. It is found that the S11 of vivaldi antenna with arc gradient groove exhibits a monotonous increase with the increase of dielectric layer thickness, and this antenna is highly sensitive to the dielectric layer thickness. Moreover, a cold-state test is carried out by using atomized wax to simulate the deposition of pollutants. A relationship as a four number of times function is found between the capacitance and the deposited mass. These results provide an important reference for the mass detection of the particle deposition on the wall, and this method is suitable for other related engineering fields.


2021 ◽  
Vol 118 (7) ◽  
pp. 071108
Author(s):  
Fatemeh Rezaeifar ◽  
Hyun Uk Chae ◽  
Ragib Ahsan ◽  
Rehan Kapadia

2005 ◽  
Vol 12 (5) ◽  
pp. 053107 ◽  
Author(s):  
W. S. Koh ◽  
L. K. Ang ◽  
T. J. T. Kwan

2021 ◽  
Author(s):  
Hirofumi Morisawa ◽  
Atsushi Ono ◽  
Wataru Inami ◽  
Yoshimasa Kawata

2020 ◽  
Vol 13 (2) ◽  
Author(s):  
Ragib Ahsan ◽  
Mashnoon Alam Sakib ◽  
Hyun Uk Chae ◽  
Rehan Kapadia

2019 ◽  
Vol 14 (12) ◽  
pp. C12003-C12003 ◽  
Author(s):  
M. Krupka ◽  
J. Krasa ◽  
R. Dudzak ◽  
J. Cikhardt ◽  
M. Kalal ◽  
...  

1986 ◽  
Vol 47 (C7) ◽  
pp. C7-139-C7-144 ◽  
Author(s):  
M. S. MOUSA ◽  
R. V. LATHAM

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