研究目的
To design a miniaturized antenna for triple narrow band 4G-LTE applications using a stack of thin-layer dielectric resonator and metamaterial unit-cell.
研究成果
The proposed antenna successfully achieves triple narrow bands in the LTE spectrum with a compact size of 20×25 mm2. The stack configuration of TL-DR and MTM unit-cell enables multiple resonances, and measured results closely match simulations. Future work could involve using different MTM unit-cells for additional bands and improving gain with negative refractive index superstrates.
研究不足
The lossy nature of the FR-4 substrate affects radiation efficiency; the antenna size, while compact, could be further miniaturized; the technique is specific to LTE bands and may not be easily adaptable to other frequencies without redesign.
1：Experimental Design and Method Selection:
The antenna design is based on a conventional microstrip patch antenna modified with a split ring resonator (SRR) and an E-shaped stub for frequency tuning. A thin-layer dielectric resonator (TL-DR) and a metamaterial (MTM) unit-cell are stacked above the patch to achieve multiple narrow bands. Theoretical models include cavity model equations for patch dimensions and Kramers-Kroing relations for MTM parameter extraction.
2：Sample Selection and Data Sources:
The antenna is fabricated on FR-4 substrate, and TL-DR and MTM unit-cell are made from specific dielectric materials (RO3010 and RO3003 substrates).
3：List of Experimental Equipment and Materials:
FR-4 substrate (εr=
4：3, tanδ=017), RO3010 substrate (εr=2, tanδ=004), RO3003 substrate (εr=3, tanδ=0013), SMA connector, silicone adhesive, photolithography process equipment, Agilent vector network analyzer (VNA). Experimental Procedures and Operational Workflow:
Design antenna using CST-MWS simulation; fabricate antenna via photolithography; mount TL-DR and MTM unit-cell with adhesive; measure S-parameters using VNA with calibration; analyze current distributions and radiation patterns.
5：Data Analysis Methods:
S-parameter analysis, current distribution simulation, radiation pattern measurement, gain and efficiency calculation using CST-MWS and VNA data.
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