研究目的
To design a compact substrate integrated waveguide bandpass filter (SIW-BPF) with back-to-back dual-G-shaped stepped impedance resonator (DGS-SIR) pair that supports forward-wave propagation below the cutoff frequency of the SIW, generates two transmission zeros (TZs) in both sides of the passband, and achieves high selectivity, sharp roll-off, and compact size.
研究成果
By combining the high pass characteristic of SIW and band-stop characteristic of DGS-SIR, a SIW-BPF is designed and fabricated using microstrip and printed circuit board technology. Two transmission zeros in lower and upper stopbands are achieved. Sharp roll-off has been obtained resulting in high selectivity. Better insertion loss, low cost, and compact size have been achieved. The measured results are in good agreement with the full-wave simulated results.
研究不足
The observed slight deviation between the simulated and measured results might be due to the fabrication errors.
1：Experimental Design and Method Selection:
The design combines the high pass characteristic of SIW and band-stop characteristic of DGS-SIR. The filter is designed and optimized using HFSS software.
2：Sample Selection and Data Sources:
A prototype SIW-BPF is implemented on a 0.508 mm Rogers RO4350 (tm) substrate with a relative dielectric constant of 3.66 and loss tangent of 0.
3：508 mm Rogers RO4350 (tm) substrate with a relative dielectric constant of 66 and loss tangent of List of Experimental Equipment and Materials:
004.
3. List of Experimental Equipment and Materials: Rohde & Schwarz ZVA 50 vector network analyzer for measurement.
4：Experimental Procedures and Operational Workflow:
The filter is fabricated using microstrip and printed circuit board technology. The external quality factor is extracted using full-wave EM simulation software.
5：Data Analysis Methods:
The performance of the filter is analyzed based on insertion loss, return loss, and the presence of transmission zeros.
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