volume | PIER Journals

Abstract

In this paper a broadband radio frequency identification (RFID) tag antenna for the ultrahigh-frequency (UHF) band is designed. The proposed antenna consists of a first-order Hilbert fractal structure and a spiral structure. In order to ensure the conjugate matching between the tag antenna and the electronic chip, a T-matching structure is employed. The interaction between two radiating elements makes the proposed antenna a fractional bandwidth of 20% over the frequency range of 820 MHz-1010 MHz and a small size of 0.2092λ₀×0.099λ₀. Simulated and measured results validate the good performance of the designed tag antenna.

1. Chen, S.-Y. and P. Hsu, "CPW-fed folded-slot antenna for 5.8 GHz RFID tags," Electron. Lett., Vol. 24, 1516-1517, 2004.
doi:10.1049/el:20046780 Google Scholar

2. Padhi, S. K., N. C. Karmakar, C. L. Law, and S. Aditya, "A dual polarized aperture coupled circular patch antenna using a C-shaped coupling slot," IEEE Trans. Antennas Propag., Vol. 51, 3295-3298, 2003.
doi:10.1109/TAP.2003.820947 Google Scholar

3. Marrocco, G., "Gain-optimized self-resonant meander line antennas for RFID applications," IEEE Antennas Wireless Propag. Lett., Vol. 2, 302-305, 2003.
doi:10.1109/LAWP.2003.822198 Google Scholar

4. Hirvonen, M., P. Pursula, K. Jaakkola, and K. Laukkanen, "Planar inverted-F antenna for radio frequency identification," Electron. Lett., Vol. 40, 848-850, 2004.
doi:10.1049/el:20045156 Google Scholar

5. Marrocco, G., "The art of UHF RFID antenna design: Impedance-matching and size-reduction techniques," IEEE Antennas Propag. Mag., Vol. 50, 66-79, 2008.
doi:10.1109/MAP.2008.4494504 Google Scholar

6. Cho, C., H. Choo, and I. Park, "Broadband RFID tag antenna with quasi-isotropic radiation pattern," Electron. Lett., Vol. 41, 1091-1092, 2005.
doi:10.1049/el:20052337 Google Scholar

7. Son, H.-W. and C.-S. Pyo, "Design of RFID tag antennas using an inductively coupled feed," Electron. Lett., Vol. 41, 994-996, 2005.
doi:10.1049/el:20051536 Google Scholar

8. Chang, C. C. and Y. C. Lo, "Broadband RFID tag antenna with capacitively coupled structure," Electron. Lett., Vol. 42, 1322-1323, 2006.
doi:10.1049/el:20062063 Google Scholar

9. Perret, E., S. Tedjini, and R. S. Nair, "Design of antennas for UHF RFID tags," Proceedings of the IEEE, Vol. 100, 2330-2340, 2012.
doi:10.1109/JPROC.2012.2186950 Google Scholar

10. Qing, X., C. K. Goh, and Z. N. Chen, "Impedance characterization of RFID tag antennas and application in tag co-design," IEEE Trans. Microw. Theory Tech., Vol. 57, 1268-1274, 2009.
doi:10.1109/TMTT.2009.2017288 Google Scholar

11. Nikitin, P. V., K. V. S. Rao, R. Martinez, and S. F. Lam, "Sensitivity and impedance measurements of UHF RFID chips," IEEE Trans. Microw. Theory Tech., Vol. 57, 1297-1302, 2009.
doi:10.1109/TMTT.2009.2017297 Google Scholar

12. Rajagopalan, H. and Y. Rahmat-Samii, "A novel conformal all-surface mount RFID tag antenna design," Proceedings of the IEEE Antenna and Propagation Society International Symposium, 1-4, 2009. Google Scholar

13. Rao, K. V. S., P. V. Nikitin, and S. F. Lam, "Antenna design for UHF RFID tags: A review and a practical application," IEEE Trans. Antennas Propag., Vol. 53, 3870-3876, 2005.
doi:10.1109/TAP.2005.859919 Google Scholar

Prof. Yan Shi

Dr. Chao Fang

Dr. Kang Qi

Professor Chang-Hong Liang