研究目的
Investigating the design and performance of a substrate integrated waveguide Butler matrix with a modified hybrid coupler for slot antenna array applications in 5G millimeter-wave wireless communications.
研究成果
The designed Butler matrix with a modified hybrid coupler demonstrates excellent performance with wideband and flat phase balance, facilitating flexible design for 5G millimeter-wave communications. The slot array antenna fed by this Butler matrix achieves acceptable gain and wide azimuthal coverage, making it a promising candidate for such applications.
研究不足
The mutual couplings between adjacent branches of slot elements and the sizable ground plane of the Butler matrix itself may affect performance, particularly in terms of side lobe levels and coupling coefficients between ports.
1：Experimental Design and Method Selection:
The study involves the design of a modified hybrid coupler and a Butler matrix for a slot antenna array, utilizing substrate integrated waveguide technology. Theoretical models and full-wave FEM simulation package, Ansoft HFSS ver. 15, were employed for design and optimization.
2：Sample Selection and Data Sources:
The components were implemented on Rogers Duroid 5880 substrate with specific thickness, loss tangent, and relative dielectric permittivity.
3：List of Experimental Equipment and Materials:
Rogers Duroid 5880 substrate, Ansoft HFSS ver. 15 for simulation, Agilent E8363B Vector Network Analyzer for measurements, and a far-?eld anechoic chamber system for radiation pattern and gain measurements.
4：Experimental Procedures and Operational Workflow:
The design process included the creation of a 90? hybrid coupler, a modified hybrid coupler combining the 90? hybrid coupler with a ?45? compensating phase shifter, and the integration into a Butler matrix. The performance was validated through simulation and physical measurements.
5：Data Analysis Methods:
The performance was analyzed based on S-parameters, output phase differences, radiation patterns, and gain measurements.
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