研究目的
To propose a novel slotted cavity–backed patch antenna with defected ground structure for dual-band UHF applications, achieving circular polarization, low profile, and miniaturization.
研究成果
The proposed antenna demonstrates good performance with dual-band operation, wide impedance bandwidth, low axial ratio, and stable radiation patterns, making it suitable for miniaturized and portable wireless systems.
研究不足
The study is based on simulations only, with no experimental validation; potential limitations include real-world fabrication challenges and environmental factors affecting performance.
1：Experimental Design and Method Selection:
The antenna design involves a square patch with a metal square-loop as radiator, a cross-shaped slotted square patch as DGS, and a metal backed-cavity. Simulations were conducted to optimize parameters and evaluate performance.
2：Sample Selection and Data Sources:
A single antenna prototype was designed and simulated; no physical samples or datasets are mentioned.
3：List of Experimental Equipment and Materials:
Substrate material is Rogers 3010 (εr = 10.2, tanδ = 0.0022) with thickness 1.0mm and size 77mm×77mm; other materials include metal for patches and cavity.
4：2, tanδ = 0022) with thickness 0mm and size 77mm×77mm; other materials include metal for patches and cavity. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The antenna was modeled in 3D, with parameters optimized through simulation (e.g., gap width g, slot ratio L3/L4). Performance metrics like S11 and axial ratio were simulated.
5：4). Performance metrics like S11 and axial ratio were simulated. Data Analysis Methods:
5. Data Analysis Methods: Simulated results for return loss, impedance bandwidth, and axial ratio were analyzed to assess antenna performance.
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