Numerical Modeling Of High Speed Time Varying Plasma Antenna Using Electromagnetic 2D Particle-In-Cell Simulation
In: 2017 IEEE International Conference on Plasma Science (ICOPS), 2017-05-01
Online
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Zugriff:
A plasma antenna as a substitute for metal antennas has been demonstrated in previous research1. However, past work has been primarily motivated by making the plasma mimic a stable conductor for transmitting or receiving electromagnetic waves1. Specifically, in a conventional short antenna, an injected current propagates down the antenna, reflects at the end, and returns to the feed in a time much shorter than a period 1. This leads to very little net current on the antenna and poor radiation. In an attempt to solve this problem, we present a new method based on blocking reflected currents in the time domain. The plasma antenna is divided into a series of segments whose conductivity can be individually controlled. Those segments turn ON and OFF, allowing injected current to propagate to the end without reflection because the reflected current pulse is selectively blocked. In order to validate this concept, we developed a 2D electromagnetic Particle In Cell (PIC) simulation 2. We perform PIC simulation of Argon-Fluoride mixture plasma. In order to model several species simultaneously and quickly, we use multi-GPU parallel processing. The input voltage is lkV pulsed, the pulsed width is 1 ns and duty ratio is 50%. We compare performance between Argon-Fluoride and Helium-Fluoride plasmas in terms of the dynamics of plasma frequency, electron velocity, plasma density and conductivity. We have identified the minimum peak voltage to create an electron channel between neighboring electrodes. The distance between electrodes should be less than 3 cm in order to have a continuous electron channel. Our simulation results show that a high-speed plasma antenna can be a potential solution to the longstanding problem of low efficiency in electrically-short antennas.
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Numerical Modeling Of High Speed Time Varying Plasma Antenna Using Electromagnetic 2D Particle-In-Cell Simulation
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Autor/in / Beteiligte Person: | Walker, Mitchell L. R. ; Golkowski, Mark ; Kingsley-Shadi, Rashad ; Kim, H. Y. ; Cohen, Morris B. |
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Zeitschrift: | 2017 IEEE International Conference on Plasma Science (ICOPS), 2017-05-01 |
Veröffentlichung: | IEEE, 2017 |
Medientyp: | unknown |
DOI: | 10.1109/plasma.2017.8496208 |
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