Influence of select discharge parameters on electric field transients triggered in collisionless very high frequency capacitive discharges

2019 ◽  
Vol 26 (10) ◽  
pp. 103508 ◽  
Author(s):  
Sarveshwar Sharma ◽  
Nishant Sirse ◽  
Abhijit Sen ◽  
Miles M. Turner ◽  
Albert R. Ellingboe
Keyword(s):  
Electric Field ◽  
High Frequency ◽  
Very High Frequency ◽  
Discharge Parameters ◽  
Capacitive Discharges ◽  
Very High

scholarly journals Measured radial dependence of the peak sheath voltages present in very high frequency capacitive discharges

2007 ◽  
Vol 90 (20) ◽  
pp. 201503 ◽  
Author(s):  
E. V. Barnat ◽  
P. A. Miller ◽  
G. A. Hebner ◽  
A. M. Paterson ◽  
Theodoros Panagopoulos ◽  
...  
Keyword(s):  
High Frequency ◽  
Radial Dependence ◽  
Very High Frequency ◽  
Capacitive Discharges ◽  
Very High

Electromagnetic Characteristics of Yagi-Uda Antenna at HF/VHF/UHF

2018 ◽  
Vol 3 (2) ◽  
pp. 7-11
Author(s):  
Raji A. Abimbola
Keyword(s):  
Electric Field ◽  
Method Of Moments ◽  
Current Distribution ◽  
High Frequency ◽  
Very High Frequency ◽  
Radiation Characteristics ◽  
Radiation Beam ◽  
Field Patterns ◽  
Electromagnetic Characteristics ◽  
Very High

In this paper, the radiation characteristics of Yagi-Uda antenna operating at High Frequency (HF), Very High Frequency (VHF) and Ultra High Frequency (UHF) are examined. Upon employing method of moments, the current distribution on the antenna emerges from the solution of matrix equation. It is found that the angular distribution of electric field intensity generated in free space by the antenna, obtained by evaluating the integral of associated current distribution, is characterized by patterns with significant portion of radiation beam in the main lobe in the direction of Yagi axis. This is accompanied by relatively small undesirable radiation in the minor lobe, and which persist over those communication frequencies. It is observed also that the current distribution that generates the radiated electric field patterns is relatively consistent over the same range of frequency.

Kinetic theory of very high-frequency and high-pressure continuous atomic discharges

1995 ◽  
Vol 54 (3) ◽  
pp. 309-332
Author(s):  
N. Peyraud-Cuenca ◽  
P. Faucher
Keyword(s):  
High Pressure ◽  
Electric Field ◽  
High Frequency ◽  
Electron Distribution Function ◽  
Very High Frequency ◽  
High Frequency Electric Field ◽  
Analytical Approaches ◽  
Very High ◽  
Stationary Electron ◽  
Good Agreement

We derive the analytical solution of the Boltzmann equation for the stationary electron distribution function that is reached in a plasma generated on the application of a uniform very high-frequency electric field in an atomic gas. The theory includes all excitation transitions: ionization and electronic transitions. The analytic solution is also extended to continuous discharges with low electric field or high pressure in the gas. Then the electron rate coefficient for excitation of the first state (which is the most significant) is calculated analytically. We apply the results to the modelling of very high-frequency argon discharges and to high-pressure continuous discharges in argon and in sodium. The results are compared with numerical results of Ferreira and co-workers for argon and of LaVerne for sodium: in both cases we find good agreement between numerical and analytical approaches.

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