High frequency traveling wave elastography of the cornea and sclera using a vibrating piezoelectric probe (Conference Presentation)

2019 ◽  
Author(s):  
Antoine Ramier ◽  
Seok-Hyun Yun ◽  
Behrouz Tavakol
Keyword(s):  
Traveling Wave ◽  
High Frequency

Research on High Bandwidth Rogowski Coil for Measuring Lightning Traveling Wave Current on Double Circuit Transmission Line

2014 ◽  
Vol 986-987 ◽  
pp. 1558-1564
Author(s):  
Cheng Ju Yang ◽  
Cheng Wei Zhang ◽  
Geng Bin Zhang ◽  
Pei Ling Chen ◽  
Shi Jun Xie
Keyword(s):  
Transmission Line ◽  
Traveling Wave ◽  
High Frequency ◽  
Power Grid ◽  
Low Frequency ◽  
Rogowski Coil ◽  
The Self ◽  
Equivalent Model ◽  
High Bandwidth ◽  
Frequency Components

Double circuit transmission line is an important part of the power grid, which is vulnerable to lightning and may endanger the security and stability of the power grid. In order to design a sensor which can monitor the lightning traveling wave current on double circuit transmission line, simulations of lightning on the double circuit transmission line were conducted. The simulation result shows that besides high frequency components, the traveling wave contains a lot of low frequency components. Based on the equivalent model and the frequency response of the self-integrated Rogowski coil, it turns out that the widely used self-integrated Rogowski coil is not suitable for this application as the problem of low frequency distortion. In this paper, through theoretical analysis and simulations in Matlab, an improved Rogowski coil with analog integrator is proposed which can correct the low frequency distortion of the self-integrated Rogowski coil. All the simulations, experiments and operating data installed to a double circuit transmission line in China verify the validity of the high bandwidth Rogowski coil.

Intrinsically resonant traveling‐wave Y‐fed directional couplers at high frequency

1988 ◽  
Vol 53 (20) ◽  
pp. 1908-1910 ◽  
Author(s):  
Y. Bourbin ◽  
M. Papuchon ◽  
A. Enard ◽  
M. Werner ◽  
C. Moronvalle
Keyword(s):  
Traveling Wave ◽  
High Frequency ◽  
Directional Couplers

DEFROSTING OF ANIMAL COLOSTRUM IN A RING RESONATOR OF ULTRA-HIGH FREQUENCY INSTALLATION

2021 ◽  
Vol 16 (3) ◽  
pp. 79-83
Author(s):  
Mar'yana Prosviryakova ◽  
Irina Ershova ◽  
Ol'ga Mihaylova ◽  
Galina Novikova ◽  
Bulat Ziganshin
Keyword(s):  
Electric Field ◽  
Traveling Wave ◽  
High Frequency ◽  
Ring Resonator ◽  
Raw Materials ◽  
Continuous Operation ◽  
High Heating Rate ◽  
Ultra High Frequency ◽  
High Heating ◽  
Vector Sum

The article is devoted to the development of a two-resonator ultra-high-frequency (UHF) installation for defrosting and warming up animal colostrum, which ensures electromagnetic safety during continuous operation. As well as the development and study of the parameters of a microwave installation, which allows defrosting and uniformly warming up colostrum of animals in the field of a standing wave in the electromagnetic field of a traveling wave. A microwave installation is described with working chambers arranged in tiers in the form of an annular and conical resonators, containing, respectively, dielectric containers and dielectric conical plates. The out-of-limit waveguide is calculated and the radiation of the electric field through the loading hole is considered in the absence of the out-of-limit waveguide at a distance from the ring resonator that is greater than the wavelength. For uniform defrosting of colostrum in plastic bottles, they should be moved in a ring resonator and the magnetrons should be positioned with a shift of 120 degrees around the perimeter. Then the resulting strength of the electric field consisting of several initial fields will be equal to the vector sum of their strengths. To achieve a high heating rate of raw materials in the region of positive temperatures, it is necessary to provide a condition for heating a thin layer of liquid with the help of coaxially located conical dielectric trays

Improving discharge uniformity of industrial-scale very high frequency plasma sources by launching a traveling wave

2016 ◽  
Vol 16 (7) ◽  
pp. 700-706 ◽  
Author(s):  
Hsin-Liang Chen ◽  
Yen-Cheng Tu ◽  
Cheng-Chang Hsieh ◽  
Deng-Lain Lin ◽  
Chin-Jung Chang ◽  
...  
Keyword(s):  
Traveling Wave ◽  
High Frequency ◽  
Industrial Scale ◽  
Very High Frequency ◽  
Plasma Sources ◽  
High Frequency Plasma ◽  
Frequency Plasma ◽  
Very High
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