研究目的
Investigating the effects of a plasma Faraday shield on the performance of a patch antenna, including gain and radiation patterns, by switching ON or OFF a fluorescent lamp.
研究成果
The study demonstrates that a fluorescent lamp can effectively act as a plasma Faraday shield, significantly reducing the gain of a patch antenna when the plasma is ON while maintaining good matching at the operating frequency. This recon?gurability can be useful for reducing antenna gain in crowded frequency bands or protecting antennas from external high-power aggression.
研究不足
The simulation results initially did not match the measurements, requiring adjustments to the plasma parameters in the Drude model. The cross-polarization simulation results did not match the measurements due to the nonperfect model.
1：Experimental Design and Method Selection:
The study involves designing a circular patch antenna operating at 2.45 GHz enclosed in a fluorescent lamp to act as a Faraday shield. The performance is evaluated through simulation and measurement.
2：45 GHz enclosed in a fluorescent lamp to act as a Faraday shield. The performance is evaluated through simulation and measurement.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: A patch antenna is printed on an FR4 substrate and placed inside a spiral-shaped fluorescent lamp. The lamp's plasma state (ON/OFF) is controlled to observe its effect on the antenna's performance.
3：List of Experimental Equipment and Materials:
A fluorescent lamp, FR4 substrate, coaxial line for feeding, and simulation software (CST Microwave Studio) are used.
4：Experimental Procedures and Operational Workflow:
The antenna's performance is simulated and measured with the lamp in both ON and OFF states to observe changes in gain and radiation patterns.
5：Data Analysis Methods:
The results are analyzed by comparing simulated and measured parameters and radiation patterns to understand the impact of the plasma Faraday shield.
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