研究目的
To propose and investigate a novel miniaturized planar ultra-wideband antenna for applications such as body-centric wireless communications, wireless universal serial bus, asset tracking, and microwave imaging.
研究成果
The proposed miniaturized planar UWB antenna achieves a wide impedance bandwidth of 1.5–10.4 GHz with satisfactory radiation properties and compact size, making it suitable for UWB applications. Future work could explore additional optimizations and applications.
研究不足
The study is limited to the specific design and materials used; potential optimizations could include further miniaturization or bandwidth extension. The feeding cable effect caused minor discrepancies in radiation patterns at lower frequencies.
1：Experimental Design and Method Selection:
The antenna design evolved from an elliptical dipole, utilizing an electromagnetically coupled structure formed by a notched half-ellipse patch and a strip on the ground plane, with a triangular slot for impedance matching. Simulations were performed using CST Microwave Studio to optimize geometric parameters.
2：Sample Selection and Data Sources:
A prototype antenna was fabricated with specific dimensions (e.g., W =
3：4 mm, L = 64 mm) on a 1mm-thick F4BM substrate. List of Experimental Equipment and Materials:
F4BM substrate (relative permittivity
4：2, loss tangent 0007), Rohde & Schwarz ZVA40 network analyzer for return loss measurements, anechoic chamber for radiation pattern measurements. Experimental Procedures and Operational Workflow:
The antenna was fabricated, and return loss was measured using the network analyzer; radiation patterns were measured in an anechoic chamber.
5：Data Analysis Methods:
Simulated and measured results were compared for return loss, radiation patterns, gain, efficiency, and group delay using software tools like CST Microwave Studio.
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