研究目的
Investigating the design and performance of a compact fifth-order bandpass filter with quasi-elliptic response using a hybrid structure of CPWs, CSRR, and dual-mode SIW in a single cavity.
研究成果
The proposed fifth-order BPF demonstrates compact size and high selectivity, with measured results closely matching simulations. The hybrid structure of CPWs, CSRR, and dual-mode SIW in a single cavity is feasible for designing high-performance filters.
研究不足
The study focuses on a specific design and frequency range, and the performance may vary with different materials or configurations. The compact size and high selectivity are achieved at the cost of complex design and fabrication processes.
1：Experimental Design and Method Selection:
The filter is designed using a hybrid structure of two CPWs and a CSRR etched on the top metal surface of a dual-mode SIW cavity. The design rationale includes achieving compact size and high selectivity through the production of multiple TZs via multipath energy flow and mixed coupling.
2：Sample Selection and Data Sources:
A prototype filter with a center frequency of 5.8 GHz is fabricated on a substrate with specific dielectric properties.
3：8 GHz is fabricated on a substrate with specific dielectric properties.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Substrate with relative dielectric constant of 2.2, thickness of 0.508mm, and loss tangent of 0.0009; ANSYS HFSS v.15.0 for simulation; network analyzer N5244A for measurement.
4：2, thickness of 508mm, and loss tangent of 0009; ANSYS HFSS v.0 for simulation; network analyzer N5244A for measurement.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The filter is simulated and optimized using ANSYS HFSS, then fabricated and measured using the network analyzer to verify the design.
5：Data Analysis Methods:
The simulated and measured S-parameters are compared to assess the filter's performance.
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