Multiphysics Enabled Numerical Modeling of a Plasma Based Electrically Small VHF-UHF Antenna
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arXiv
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866908948371603456 |
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| author | Moon, Samsud |
| author_facet | Moon, Samsud |
| contents | A three-dimensional model of a novel plasma based electrically small antenna is developed for investigating the gas properties and antenna parameters under a low pressure, low plasma temperature environment. The antenna exhibits dipole antenna-like behavior with wide-band impedance matching from $213-700$ MHz. Plasma is sustained by $0.9$ W of RF input power at $100$ MHz and the gas pressure is strategically controlled at $500$ mili-Torr. The simulated $S_{11}$ is verified against the available experimental data and further antenna parameters are extracted. The proposed ESA shows dipole-like radiation pattern with a radiation efficiency of $16\%$ at $700$ MHz. The performance metric for ESAs, the Chu-limit, is exceeded by this antenna with the $Bandwidth\times Efficiency$ reaching $0.168$ with a $ka$ of $0.5571$.The findings from this letter demonstrate the practicability of using COMSOL Multiphysics as a tool for predicting plasma behavior and antenna performance while the boundary conditions for all the coupled physics are respected. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_03077 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Multiphysics Enabled Numerical Modeling of a Plasma Based Electrically Small VHF-UHF Antenna Moon, Samsud Plasma Physics A three-dimensional model of a novel plasma based electrically small antenna is developed for investigating the gas properties and antenna parameters under a low pressure, low plasma temperature environment. The antenna exhibits dipole antenna-like behavior with wide-band impedance matching from $213-700$ MHz. Plasma is sustained by $0.9$ W of RF input power at $100$ MHz and the gas pressure is strategically controlled at $500$ mili-Torr. The simulated $S_{11}$ is verified against the available experimental data and further antenna parameters are extracted. The proposed ESA shows dipole-like radiation pattern with a radiation efficiency of $16\%$ at $700$ MHz. The performance metric for ESAs, the Chu-limit, is exceeded by this antenna with the $Bandwidth\times Efficiency$ reaching $0.168$ with a $ka$ of $0.5571$.The findings from this letter demonstrate the practicability of using COMSOL Multiphysics as a tool for predicting plasma behavior and antenna performance while the boundary conditions for all the coupled physics are respected. |
| title | Multiphysics Enabled Numerical Modeling of a Plasma Based Electrically Small VHF-UHF Antenna |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2405.03077 |