研究目的
To propose two novel microstrip bandpass filters with improved selectivity based on dual-mode ring resonators, achieving two and four transmission zeros close to the passband for enhanced selectivity.
研究成果
The proposed bandpass filters demonstrate improved selectivity and higher passband-order with adjustable transmission zeros close to the passband. The designs show good agreement between simulated and measured results, making them suitable for wideband wireless applications.
研究不足
The study is limited to the design and simulation of microstrip bandpass filters with specific configurations. The practical implementation may face challenges related to fabrication tolerances and material properties.
1：Experimental Design and Method Selection:
The study involves the design of microstrip bandpass filters using dual-mode ring resonators with open/shorted stubs to achieve sixth-order passband and adjustable transmission zeros.
2：Sample Selection and Data Sources:
The filters are designed on a dielectric substrate with specific parameters (εr =
3：65, h = 0 mm, tanδ = 003). List of Experimental Equipment and Materials:
ANSYS Designer v
4：0 and ANSYS HFSS v.0 for simulation. Experimental Procedures and Operational Workflow:
The design involves adjusting characteristic impedances of coupled lines and stubs to achieve desired filter characteristics, followed by simulation and optimization.
5：Data Analysis Methods:
The performance of the filters is analyzed based on simulated and measured S-parameters to evaluate selectivity, bandwidth, and transmission zeros.
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