研究目的
Investigating the design and performance of wearable textile-based UHF patch antennas with H-shaped slot for RFID applications.
研究成果
The study demonstrated the feasibility of textile-based patch antennas for RFID applications, though with performance trade-offs compared to metallic antennas. Future work includes detailed read range tests in free space and on human body.
研究不足
The textile antennas showed significant radiation directed into the back lobe and had higher losses compared to metallic counterparts, leading to reduced read ranges. The discrepancy between calculated and measured resonant frequencies was attributed to the conductive thread length increase due to lockstitch.
1：Experimental Design and Method Selection:
The study involved designing two textile-based patch antennas with H-shaped slots for RFID applications, differing in embroidered grid density. The antennas were fabricated using conductive yarn embroidered into denim textile.
2：Sample Selection and Data Sources:
Two prototypes were manufactured, one with a sparse embroidered net and another with a denser net of conductive threads.
3：List of Experimental Equipment and Materials:
Shieldex 117/17 dtex 2-ply HC+B thread was used for embroidering. The antennas were connected to a coaxial system via a pigtail with snap-on buttons for measurements.
4：Experimental Procedures and Operational Workflow:
The antennas' performance was evaluated in terms of gain, input impedance, and radiation patterns. The RFID chip was integrated, and read-range was tested.
5：Data Analysis Methods:
Measurements were performed using a VNA for impedance and a double ridged waveguide horn for radiation pattern analysis.
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