研究目的
To design a balun filter and a balanced filter based on substrate integrated waveguide (SIW) with good filtering responses, high common mode suppression, simple structure and easy integration.
研究成果
The presented balun and balanced filters have the advantages of good filtering responses, high common mode suppression, simple structure and easy integration, which are attractive in wireless communication systems.
研究不足
The design is limited to narrow-band applications due to the use of high Q factor SIW cavity.
1：Experimental Design and Method Selection:
The design utilizes the EM-field properties of a TE102 and TE201 orthogonal modes SIW cavity to realize the balun and balanced filters.
2：Sample Selection and Data Sources:
A circle SIW cavity is used for the design.
3：List of Experimental Equipment and Materials:
The substrate has the dielectric constant of
4：55 and loss tangent of Experimental Procedures and Operational Workflow:
The design involves arranging input/output ports in the SIW cavity to achieve the desired phase difference and filtering responses.
5：Data Analysis Methods:
The performance is verified through simulation and measurement using a network analyzer.
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