期刊
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
卷 14, 期 -, 页码 1474-1477出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2014.2363556
关键词
Conductive textiles; embroidered antennas; embroidery geometrical accuracy
资金
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1349096] Funding Source: National Science Foundation
An embroidery process with high geometrical accuracy is presented for antennas with fine details. Previous embroidery processes employed thicker threads, leading to resolution not better than 1 mm. Therefore, fine details (e.g., sharp corners) could not be realized, and geometrical accuracy was low, viz. > 1 mm. To overcome these limitations, in this letter we: 1) employ much thinner E-fibers to enable the printing of sharp corners, and 2) increase embroidery density to boost surface conductivity. Two Liberator E-fibers were tested: 1) 40-strand (diameter = 0.27 mm), and 2) 20-strand (diameter = 0.22 mm). Embroidery density was optimized using double-layer stitching of 7 threads/mm. To validate our embroidery approach, we fabricated and tested a dipole antenna with intricate details operating at 2.4 GHz. This design could not be formerly printed on textiles. Both E-fiber (40/20-strand) prototypes exhibited excellent performance, comparable to that of copper antennas. The achieved geometrical accuracy was similar to 0.3 mm (viz. 3 times better).
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