研究目的
To design and analyze a bandwidth reconfigurable band-pass filter using spoof surface plasmon polaritons at THz/Microwave frequency, incorporating a variable capacitor device for tuning.
研究成果
The proposed reconfigurable band-pass filter using spoof SPP technology demonstrates effective bandwidth tuning at both THz and microwave frequencies. It offers reduced size and power consumption compared to traditional filters, with potential applications in integrated plasmonic devices and circuits. Future work could focus on optimizing the design for higher frequency operation and improved performance metrics.
研究不足
Fabrication and characterization limitations at THz frequency necessitated experimental validation at microwave frequency. The tuning range and insertion loss may be constrained by the properties of the variable capacitor and substrate materials.
1：Experimental Design and Method Selection:
The design utilizes a spoof SPP T-shape resonator with variable capacitance for bandwidth tuning. Even and odd mode analysis is employed to understand the phenomenon. Co-EM simulation is used for demonstration at THz frequency, and experimental validation is conducted at microwave frequency using a varactor diode as the tuning element.
2：Sample Selection and Data Sources:
The filter is designed and fabricated on a microwave laminate substrate. Simulation data is generated using Co-EM tools, and experimental data is collected using a Keysight Field-Fox analyzer.
3：List of Experimental Equipment and Materials:
Substrate with specific dielectric properties, varactor diode SMV1430-040LF, RF-choke inductor (Coilcraft 33nH), blocking capacitor (ATC 100pF), Keysight Field-Fox analyzer N9918A, and fabrication tools for the prototype.
4：Experimental Procedures and Operational Workflow:
The resonator is designed with a T-shape structure, coupled to SSPP transmission lines. A variable capacitor is integrated for tuning. The prototype is fabricated, and S-parameters are measured with varying bias voltages to the varactor diode.
5：Data Analysis Methods:
S-parameter measurements are analyzed to determine bandwidth reconfigurability and insertion loss. Simulation results are compared with experimental data for validation.
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