研究目的
To propose and design novel wideband reflective and absorptive bandstop filters with high stopband rejection, good frequency selectivity, and compact circuit configuration for applications in RF/microwave front ends.
研究成果
The proposed wideband reflective and absorptive bandstop filters achieve high stopband rejection, good frequency selectivity, and compact size, with experimental results matching simulations. They offer advantages for modern wireless communication systems, with potential for further miniaturization and integration.
研究不足
The design relies on specific substrate properties and may require optimization for different frequencies or materials. The absorptive filter has a lower stopband rejection compared to the reflective one, and the compact size might limit power handling or other performance aspects.
1：Experimental Design and Method Selection:
The study uses coupled line (CL) structures with open-circuited stubs and modified CL configurations for reflective and absorptive bandstop filters. Even- and odd-mode analyses are employed to derive S-parameters and transmission zeros.
2：Sample Selection and Data Sources:
Filters are designed and simulated using Advanced Design System software, and measurements are performed using a vector network analyzer.
3：List of Experimental Equipment and Materials:
Substrate RO4350B with relative dielectric constant 3.66, thickness 0.762 mm, loss tangent 0.0037; vector network analyzer Rohde&Schwarz ZVA
4：66, thickness 762 mm, loss tangent 0037; vector network analyzer Rohde&Schwarz ZVAExperimental Procedures and Operational Workflow:
8. 4. Experimental Procedures and Operational Workflow: Design filters with specified center frequency, passband return loss, stopband rejection, and bandwidth; optimize circuit parameters; fabricate prototypes; simulate and measure S-parameters.
5：Data Analysis Methods:
Compare simulated and measured results to validate performance, including stopband rejection, bandwidth, and return loss.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
