研究目的
Investigating the design and functionality of a programmable hybrid circuit based on reconfigurable spoof surface plasmon polariton (SPP) waveguides and a substrate integrated waveguide (SIW) for applications in multifunctional integrated circuits and digital communication systems.
研究成果
The proposed programmable hybrid circuit based on reconfigurable SPP waveguides and SIW demonstrates versatile functionalities including power division, filtering, and logic operations through bias voltage programming. Despite some limitations in transmission efficiency, the circuit's strong anti-interference capability and potential for integration in microwave circuits and digital communication systems are highlighted.
研究不足
The transmission efficiencies of the power division and filtering are not ideal due to metallic loss, dielectric loss, impedance mismatch between spoof SPP waveguides and SIW, and radiation loss at small-radius bends. The parasitic resistance of varactor diodes and imperfect soldering also affect performance, especially at higher frequencies.
1：Experimental Design and Method Selection:
The study involves the design of a hybrid circuit combining reconfigurable SPP waveguides with varactor diodes and an SIW to manipulate dispersion behaviors for achieving band-pass effects, power division, and filtering functionalities. Theoretical models and numerical simulations are employed to predict and analyze the circuit's performance.
2：Sample Selection and Data Sources:
The fabricated reconfigurable waveguide sample includes varactor diodes MA46H120 for capacitance tuning. Measurements are conducted using a vector network analyzer (Agilent N5230C) to validate the simulation results.
3：List of Experimental Equipment and Materials:
Key materials include Rogers 4003 and 4450 substrates, varactor diodes MA46H120, and a vector network analyzer for S-parameter measurements.
4：Experimental Procedures and Operational Workflow:
The experiment involves programming bias voltages to control the capacitances of varactor diodes, thereby manipulating the dispersion characteristics of the SPP waveguides. The performance of the circuit as a power divider, filter, and logic gate is evaluated through simulations and measurements.
5：Data Analysis Methods:
The dispersion relations and S-parameters are analyzed using theoretical models and numerical simulations, with experimental results compared against simulations to validate the circuit's functionalities.
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