On Electric Field Distribution and Temperature Rise Effect of High Power VLF Antenna

2021 ◽  
Vol 36 (6) ◽  
pp. 684-696
Author(s):  
Xianqiang Li ◽  
Kedan Mao ◽  
Ao Wang ◽  
Ji Tian ◽  
Wenchuang Zhou
Keyword(s):  
Dielectric Loss ◽  
Electric Field ◽  
Field Distribution ◽  
High Power ◽  
Temperature Rise ◽  
Electric Field Distribution ◽  
Strong Electric Field ◽  
Low Frequency ◽  
Problem Analysis ◽  
Novel Approach

When a high-power very low frequency (VLF) communication system is in operation, the end of the antenna is in an alternating strong electric field environment. Due to dielectric loss, abnormal temperature rise may occur at the end of the antenna. To solve the problem, analysis on the electric field distribution and temperature rising effect at the end of the antenna is first carried out in this paper. The factors that affect the electric field distribution and temperature rising, including the amplitude and frequency of the excitation voltage, the diameter of the antenna conductor and the material properties of the outer sheath of the antenna, are studied in detail. A novel approach to improve the electric field distribution and to suppress temperature rising is proposed by designing a dielectric loss eliminator, and the effectiveness of the designed device is verified by simulation.

Study of electric field distribution and low frequency noise of CdZnTe radiation detectors

2013 ◽  
Vol 8 (06) ◽  
pp. C06005-C06005 ◽  
Author(s):  
O Sik ◽  
L Grmela ◽  
H Elhadidy ◽  
V Dedic ◽  
J Sikula ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Distribution ◽  
Electric Field Distribution ◽  
Low Frequency ◽  
Radiation Detectors ◽  
Frequency Noise ◽  
Low Frequency Noise

Measurements of the Electric Field Distribution in High-power Diodes

1986 ◽  
Vol 57 (6) ◽  
pp. 699-702 ◽  
Author(s):  
Y. Maron ◽  
M. D. Coleman ◽  
D. A. Hammer ◽  
H. -S. Peng
Keyword(s):  
Electric Field ◽  
Field Distribution ◽  
High Power ◽  
Electric Field Distribution ◽  
Power Diodes

scholarly journals Analytical and Experimental Studies on the Application of a Series of Treatment Chambers for Escherichia coli Inactivation by Pulsed Electric Fields

2020 ◽  
Vol 10 (12) ◽  
pp. 4071
Author(s):  
Khanit Matra ◽  
Pattakorn Buppan ◽  
Boonchai Techaumnat
Keyword(s):  
Escherichia Coli ◽  
Electric Field ◽  
Field Distribution ◽  
Electric Fields ◽  
Temperature Rise ◽  
Electric Field Distribution ◽  
Pulsed Electric Fields ◽  
Maximum Temperature ◽  
Liquid Media ◽  
Flowing Liquid

The paper investigated studies on the application of pulsed electric fields for the treatment of liquid media in a continuous manner in a co-field treatment chamber with elliptic insulator profiles. The electric field distribution and the temperature rise in the treatment chamber were evaluated via the finite element method. A non-uniform electric field was found at the elliptical insulator edges, while the electric field distribution on the insulator surface was rather uniform. The maximum temperature rise in the liquid media was located slightly behind the elliptic insulator due to the accumulated heat in the flowing liquid media. In the optimized treatment chamber, the average electric field intensity could be as high as 12.21 kV/cm at the moderate voltage at 7.5 kV. As a strategy to improve the inactivation while limiting the temperature rise, a series of treatment chambers was verified by experiments under the conditions of 7.5 kV, a 2.5% duty cycle, and 250 Hz. It was found that an increase in the treatment units could increase the inactivation efficiency for Escherichia coli. The average log reduction could be improved from 1.82 to 2.39 when the number of treatment units was increased from 1 to 5, respectively.

Effect of Void Shape in Polymeric Insulator on the Electric Field Distribution

2017 ◽  
Vol 5 (3) ◽  
pp. 96
Author(s):  
I. Made Yulistya Negara ◽  
Dimas Anton Asfani ◽  
Daniar Fahmi ◽  
Yusrizal Afif
Keyword(s):  
Electric Field ◽  
Field Distribution ◽  
Electric Field Distribution ◽  
Void Shape

Tuning the Localized Surface Plasmon Resonance of Al-Al2O3 Nanosphere Towards NIR Region by Gold Coating

2020 ◽  
Vol 12 ◽  
Author(s):  
Jyoti Katyal ◽  
Shivani Gautam
Keyword(s):  
Electric Field ◽  
Field Distribution ◽  
Dielectric Layer ◽  
Electric Field Distribution ◽  
Active Material ◽  
Visible Region ◽  
Field Enhancement ◽  
Localized Surface Plasmon ◽  
Sers Substrate ◽  
Al Nanoparticles

Background: A relatively narrow LSPR peak and a strong inter band transition ranging around 800 nm makes Al strongly plasmonic active material. Usually, Al nanoparticles are preferred for UV-plasmonic as the SPR of small size Al nanoparticles locates in deep UV-UV region of the optical spectrum. This paper focused on tuning the LSPR of Al nanostructure towards infrared region by coating Au layer. The proposed structure has Au as outer layer which prevent the further oxidation of Al nanostructure. Methods: The Finite Difference Time Domain (FDTD) and Plasmon Hybridization Theory has been used to evaluated the LSPR and field enhancement of single and dimer Al-Al2O3-Au MDM nanostructure. Results: It is observed that the resonance mode show dependence on the thickness of Al2O3 layer and also on the composition of nanostructure. The Au layered MDM nanostructure shows two peak of equal intensities simultaneously in UV and visible region tuned to NIR region. The extinction spectra and electric field distribution profiles of dimer nanoparticles are compared with monomer to reveal the extent of coupling. The dimer configuration shows higher field enhancement ~107 at 1049 nm. By optimizing the thickness of dielectric layer the MDM nanostructure can be used over UV-visible-NIR region. Conclusion: The LSPR peak shows dependence on the thickness of dielectric layer and also on the composition of nanostructure. It has been observed that optimization of size and thickness of dielectric layer can provide two peaks of equal intensities in UV and Visible region which is advantageous for many applications. The electric field distribution profiles of dimer MDM nanostructure enhanced the field by ~107 in visible and NIR region shows its potential towards SERS substrate. The results of this study will provide valuable information for the optimization of LSPR of Al-Al2O3-Au MDM nanostructure to have high field enhancement.

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