Optimum Design of Traveling-Wave SIW Slot Array Antennas

2013 ◽  
Vol 61 (4) ◽  
pp. 1971-1975 ◽  
Author(s):  
Seyed Ehsan Hosseininejad ◽  
Nader Komjani
Keyword(s):  
Optimum Design ◽  
Traveling Wave ◽  
Array Antennas

The Optimum Design of Traveling-Wave Electroosmotic Micropumps

2009 ◽  
Author(s):  
Shou-Ping Hsu ◽  
Hong-Jun Ye ◽  
Win-Jet Luo ◽  
Jauh-Shyong Chen
Keyword(s):  
Electric Field ◽  
Optimum Design ◽  
Double Layer ◽  
Traveling Wave ◽  
Microelectrode Arrays ◽  
Operating Frequency ◽  
Optimum Operating ◽  
Gap Size ◽  
Wave Potential

This study investigates the performace of electroosmotic micropumps with arrays of microelectrodes for pumping electrolyte in a microchannel. Traveling-wave potentials are applied to the microelectrode arrays. Ions accumulate in the double layer in response to the applied signal. The electric field acts on the charge pulling the fluid in the direction of the traveling wave. In this study, the effects of the widths and heights of the electrodes, the gap size between the electrodes and the frequency of the applied traveling-wave potential on the pumping velocity of the micropump are investigated in order to obtain the optimum design of the micropump. The optimum operating frequency of the traveling-wave potential is about 1 kHz for the micropumps with different electrode widths and gap sizes. The pumping velocities increase with the decrease of the electrode widths and gap sizes for the micropumps. For the micropumps with different electrode widths and gap sizes, it is found the optimum electrode heights are about 5.5 μm when the gap sizes are less than the electrode widths, and the optimum electrode heights are about 10.4 μm when the gap sizes are greater than the electrode widths.

Optimum Design of Electron Gun for 0.22-THz Traveling Wave Tubes

2021 ◽  
pp. 1-1
Author(s):  
Yue Ou ◽  
Wenxin Liu ◽  
Kedong Zhao ◽  
Zhihao Jin ◽  
Yanyu Wei ◽  
...  
Keyword(s):  
Optimum Design ◽  
Traveling Wave ◽  
Electron Gun ◽  
Traveling Wave Tubes

Optimum design of a wideband traveling-wave photodetector on InP for use at 1.55 μm

1999 ◽  
Author(s):  
Luan Nguyen ◽  
Pierre Berini ◽  
Ezio Berolo ◽  
H. R. Khazaei
Keyword(s):  
Optimum Design ◽  
Traveling Wave

Optimum Design Method for Sub-Reed of an Ultrasonic Motor

1991 ◽  
Vol 3 (4) ◽  
pp. 314-319
Author(s):  
Seiji Aoyagi ◽  
◽  
Yoshitugu Kamiya ◽  
Sakiichi Okabe
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimum Design ◽  
Traveling Wave ◽  
Vibration Analysis ◽  
Design Method ◽  
Elastic Vibration ◽  
Ultrasonic Motor ◽  
Trial And Error ◽  
Element Analysis

In order to increase the rotational speed of an ultrasonic motor using a flexural traveling wave, slits made on the surface of the stator are very effective. In this paper the projections made by the slits are called ""sub-reeds"" for convenience. Though the sub-reeds play important roles in an ultrasonic motor, their dimensions are generally decided through trial and error. This paper presents the optimum design method of a sub-reed by using elastic vibration analysis. This method calculates the dimensions of the sub-reed of which resonant frequency is same as that of the basic disc. This paper also shows that the resonance of the sub-reed mainly causes the magnification of the amplitude by using finite element analysis. The optimum design method and the mechanism of the magnification mentioned above are confirmed by experiments.

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