研究目的
Investigation of the application of a halfwave coupled resonator employing dumbbell placed in the ground plane (DGS) to design wideband filter and extension and application of the developed modeling procedure based on wave digital approach in order to generate model of microstrip bandpass DGS filter.
研究成果
The WD model of microstrip structure should be improved and characteristic impedances of coupled sections with DGS should be carefully calculated. It has a significant effect on the model parameters, which may affect the response of the structure.
研究不足
Frequency shift in WD response compared to ideal response and some level shift comparing measurement results with simulation results obtained from generated WD model. The effect of adaptors coefficients on the properties of the WD model needs further analysis.
1：Experimental Design and Method Selection:
The design of a microstrip bandpass filter based on edge coupled DGS resonators using Chebyshev approximation and the generation of a wave digital model using admittance inverters.
2：Sample Selection and Data Sources:
A dielectric FR4 substrate with specific properties is used in simulation and design purposes.
3：List of Experimental Equipment and Materials:
Vector Network Analyzer for measurements, Simulink platform of MATLAB for simulation of the generated WD model.
4：Experimental Procedures and Operational Workflow:
Design process for wideband filter, simulation in a full-wave electromagnetic (EM) simulator, fabrication of the filter, and experimental verification.
5：Data Analysis Methods:
Calculation of coupling coefficients, analysis of S-parameters obtained from simulation of generated WD model.
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