研究目的
Investigating the design and performance of a novel dual-band branch line coupler with high isolation using loaded coupled lines.
研究成果
The proposed planar coupler with high isolation using open/shorted coupled lines can be adjusted over a wide frequency band. It offers advantages of multiband operation, simple structures, and high isolation.
研究不足
The study focuses on a specific design of a dual-band coupler with certain material properties and operational frequencies. The applicability of the design to other frequencies or materials is not explored.
1：Experimental Design and Method Selection:
The study employs a conventional coupler loaded with quarter-wavelength open coupled lines to achieve dual-band performance. The design is analyzed using even-odd-mode analysis to simplify the analysis and derive operating frequencies.
2：Sample Selection and Data Sources:
The coupler is designed and fabricated for operation at
3：75/32 GHz. List of Experimental Equipment and Materials:
The circuits and structures are simulated with Ansoft Designer v
4：0 and Ansoft HFSS v0, and constructed on a dielectric substrate with εr = 65, h = 0 mm, and tanδ = Experimental Procedures and Operational Workflow:
The coupler's performance is evaluated through simulation and measurement, focusing on insertion losses, phase difference, and isolation.
5：Data Analysis Methods:
The performance is analyzed based on simulated and measured results, including insertion losses, phase difference, and isolation levels.
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