研究目的
To propose and investigate a tunable electromagnetic bandgap (EBG) structure using plasma for controlling the stopband position and bandwidth by adjusting electron density and collision frequency.
研究成果
The study demonstrates the feasibility of using plasma to tune the stopband of an EBG structure, with simulations showing a significant shift rate and bandwidth reduction. A modified configuration is proposed to better suit experimental conditions, with ongoing work to validate the plasma parameters experimentally.
研究不足
The study is limited to microwave dimensioning and simulations. Experimental validation is pending, and the feasibility of achieving the selected plasma parameters in the proposed configuration is under investigation.
1：Experimental Design and Method Selection:
The study proposes a tunable EBG structure based on a double layer slotline using plasma. The plasma permittivity is tuned by electron density, with periodic plasma elements integrated inside the slot to tune the stopband.
2：Sample Selection and Data Sources:
The study uses a double layer slotline EBG structure with specific dimensions and plasma parameters (ne = 1.75 1013 cm?3, ν = 1010 s?1).
3：75 1013 cm?3, ν = 1010 s?1).
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: A commercial full-wave solver HFSS is used for simulations. The structure includes dielectric layers, metallic sheets, and discs.
4：Experimental Procedures and Operational Workflow:
Simulations are conducted to analyze the effect of plasma on the EBG structure's stopband. A new configuration with holes in the substrates is proposed to facilitate plasma creation.
5：Data Analysis Methods:
The transmission coefficient S21 is analyzed to observe the stopband shift and bandwidth reduction.
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