研究目的
To propose a wideband omnidirectional filtering patch antenna with high selectivity for mobile communications, achieving wide impedance bandwidth and stable in-band gain simultaneously.
研究成果
The proposed omnidirectional filtering patch antenna achieves a wide impedance bandwidth of 30.2% and an average gain of 6.5 dBi, with good out-of-band suppression. The design demonstrates high selectivity and compact size, making it suitable for indoor or vehicle-mounted systems.
研究不足
The design focuses on achieving high selectivity and wide bandwidth without additional filtering circuits, which may limit the flexibility in adjusting filtering characteristics post-fabrication.
1：Experimental Design and Method Selection:
The design involves an annular ring surrounded by a hexagonal patch with an inner circle, a copper top hat, and a series of shorting vias to achieve broadband performance and high selectivity.
2：Sample Selection and Data Sources:
The antenna is fabricated on a PCB with specific parameters.
3：List of Experimental Equipment and Materials:
A PCB with a relative permittivity of εr =
4：2 and a thickness of h = 3 mm is used. Experimental Procedures and Operational Workflow:
The design process includes the evolution of antenna geometry through five stages, optimizing parameters for performance.
5：Data Analysis Methods:
Simulated and measured results of reflection coefficients, radiation gains, and realized gains are compared to evaluate performance.
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