研究目的
Designing a compact quad-band bandpass filter for simultaneous operation at GSM, LTE, WiMAX, and WLAN bands using stub-loaded resonator technology.
研究成果
The paper presents a miniaturized, multiband microstrip filter that operates simultaneously at GSM, LTE, WiMAX, and WLAN bands with low insertion loss, high return loss, and sharp skirt selectivity. The good agreement between simulated and measured results validates the design approach.
研究不足
The design requires precise control over the lengths of the stubs to achieve the desired resonant frequencies, which may complicate the fabrication process. Additionally, the performance is sensitive to the substrate material properties.
1：Experimental Design and Method Selection:
The filter was designed using the stub-loaded resonator (SLR) technique, allowing for the variation of the even-mode resonant frequency without affecting the odd-mode.
2：Sample Selection and Data Sources:
The filter was fabricated on a
3：762 mm thick Rogers RO4350 substrate. List of Experimental Equipment and Materials:
Keysight PNA N5221A network analyzer was used for measurements.
4：Experimental Procedures and Operational Workflow:
The filter was designed, simulated using ANSYS HFSS v14, fabricated, and then measured.
5：Data Analysis Methods:
The frequency response was analyzed to validate the filter's performance across the desired bands.
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