研究目的
To design and validate a compact low-pass filter (LPF) with an extended stopband and miniaturized size, featuring three transmission zeros for improved performance in wireless communication systems.
研究成果
The proposed compact LPF structure with three transmission zeros demonstrates a quasi-elliptic low-pass filtering response, allowing for flexible tuning of zero positions. The design achieves a wide stopband and compact size, validated through simulation and measurement. This advancement addresses the need for miniaturized and high-performance LPFs in modern communication systems.
研究不足
The study focuses on the design and validation of LPFs with specific configurations. The practical implementation may require adjustments based on the substrate material and fabrication precision.
1：Experimental Design and Method Selection:
The study employs an equivalent circuit analysis to investigate the proposed LPF structure, which includes an upper high-impedance transmission line, a middle extended parallel coupled line, and a pair of inter-coupled symmetrical stubs.
2：Sample Selection and Data Sources:
Two exemplary LPFs are designed, fabricated, and measured to validate the design concept.
3：List of Experimental Equipment and Materials:
The filters are fabricated on a
4：5 mm substrate with a relative dielectric constant of Experimental Procedures and Operational Workflow:
The design involves optimizing dimensions for the LPFs, followed by simulation and measurement to compare results.
5：Data Analysis Methods:
The performance of the LPFs is analyzed based on their transmission zeros, stopband width, and size.
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