研究目的
Investigating the design and performance of a novel bandpass filter (BPF) with high selectivity and very wide stopband using open stub loaded and defected ground structures (DGSs).
研究成果
The proposed BPF demonstrates low insertion loss, high return loss, and high selectivity with an ultra-wide stopband extending above 20 times the center frequency, making it suitable for modern wireless communication systems.
研究不足
The study focuses on the design and implementation of a BPF with specific characteristics but does not explore the scalability or adaptability of the design to other frequency ranges or applications.
1：Experimental Design and Method Selection:
The study employs half-wave-length (λ/2) stepped-impedance resonators (SIRs) and several bandstop structures including open stubs and defected ground structures (DGSs) to design a BPF with high selectivity and wide stopband.
2：Sample Selection and Data Sources:
The BPF is implemented on Rogers RT 5880 substrate with specific dielectric parameters.
3：List of Experimental Equipment and Materials:
Rogers RT 5880 substrate, conductor thickness of 17 um, and substrate thickness of
4：76 mm. Experimental Procedures and Operational Workflow:
The BPF design involves the use of SIRs to push spurious harmonics to upper frequencies, application of bandstop structures for stopband performance improvement, and use of 0° feed structure for selectivity enhancement.
5：Data Analysis Methods:
Simulated and measured results are compared to evaluate the BPF's performance.
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