研究目的
To design a compact cross-coupled bandpass filter with suppression of second and third harmonics for modern communications.
研究成果
The proposed compact cross-coupled filter effectively suppresses second and third harmonics, improving frequency selectivity and extending the upper stopband, making it suitable for modern wireless systems.
研究不足
The design requires precise adjustment of physical dimensions and coupling coefficients, which may increase the difficulty of design.
1:Experimental Design and Method Selection:
The filter is designed using quarter-wavelength resonators and a 0° feed mechanism to suppress spurious responses.
2:Sample Selection and Data Sources:
The filter is fabricated on a substrate with a relative permittivity of
3:2 and a thickness of 508 mm. List of Experimental Equipment and Materials:
Substrate RT/Duroid 5880, commercial simulator HFSS for design and optimization.
4:Experimental Procedures and Operational Workflow:
The filter's physical dimensions and coupling coefficients are adjusted to meet theoretical values.
5:Data Analysis Methods:
S-parameters are measured to evaluate the filter's performance.
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