研究目的
To study the effect on the quality factor by adding cylindrical posts to coupled cavity resonator for millimeter-wave applications.
研究成果
The proposed single cavity with cylindrical dielectric posts demonstrates a higher quality factor and better performance compared to SIW and ESIW filters. The method shows potential for improving the quality factor of narrow band filters in future designs.
研究不足
The fabrication challenges and measurement difficulties at millimeter-wave frequencies, including PCB roughness and higher losses during measurement, lead to discrepancies between simulated and measured quality factors.
1：Experimental Design and Method Selection:
The study involves modeling a single coupled cavity with cylindrical posts to enhance the quality factor. The design is compared to an empty substrate integrated waveguide (ESIW) filter.
2：Sample Selection and Data Sources:
The substrate used is Roger RT 6002 with specific permittivity and thickness.
3：List of Experimental Equipment and Materials:
The simulation and optimization are performed using HFSS software. The fabrication process involves etching on a single planar substrate.
4：Experimental Procedures and Operational Workflow:
The cavity is simulated, optimized, and then fabricated. Measurements are carried out using a VNA Agilent (8722ES) with TRL-kit to avoid the effect of test fixtures and RF cables.
5：Data Analysis Methods:
The quality factor is calculated based on the fractional bandwidth method. The E-field distribution is analyzed to understand energy conservation.
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