volume | PIER Journals

Abstract

This paper proposes a novel corner-fed Circular Polarization (CP) reader antenna for handheld Ultra-High Frequency (UHF) Radio Frequency Identification (RFID) application. The CP mechanism is accomplished by a multi-bending feeding strip located at corner of a high dielectric constant (K = 60) ceramic substrate. By using the high dielectric substrate, the dimension of the proposed antenna can be effectively reduced to 27 × 27 × 4 mm³, which consists of a top radiating patch, an antenna ground plane, a coupling multi-bending feeding strip, and a SMA connector for RF input. The top radiating patch is printed on the top surface of the ceramic substrate and the antenna ground plane is formed on the opposite side. The central frequency of resonant band can be easily controlled by adjusting the size of the top radiating patch. By optimizing the coupling feeding mechanism, not only impedance matching can be achieved for bandwidth operation in Taiwan's UHF RFID band, but also two orthogonal field components with 90° phase difference for circular polarization are obtained. In addition, the proposed antenna is placed on an 80 × 80 × 0.8 mm³ FR4 system ground plane for reducing hand holding effect.

1. Ahsan, K., H. Shah, and P. Kingston, "RFID applications: An introductory and exploratory study," IJCSI International Journal of Computer Science Issues, Vol. 7, No. 3, 1-7, 2010.

2. Chung, H. L., X. Qing, and Z. N. Chen, "A broadband circularly polarized stacked probe-fed patch antenna for UHF RFID applications," International Journal of Antennas and Propagation, Vol. 2007, 1-8, 2007.
doi:10.1155/2007/76793

3. Klaus, F., RFID Handbook, Wiley, New York, 2003.

4. Lee, C., W. K. Han, I. Park, and H. Choo, "Design of a double-layered spiral antenna for radio frequency identification applications," IET Microwaves, Antennas & Propagation, Vol. 4, No. 1, 121-127, 2010.
doi:10.1049/iet-map.2008.0315

5. Neyestanak Lotfi, A. A., "Ultra wideband rose leaf microstrip patch antenna," Progress In Electromagnetics Research, Vol. 86, 155-168, 2008.
doi:10.2528/PIER08090201

6. Zhao, S. C., B. Z. Wang, and Q.-Q. He, "Broadband radar cross section reduction of a rectangular patch antenna," Progress In Electromagnetics Research, Vol. 79, 263-275, 2008.
doi:10.2528/PIER07101002

7. Sharma, P. C. and K. C. Gupta, "Analysis and optimized design of single feed circularly polarized microstrip antenna," IEEE Trans. on Antennas and Propagation, Vol. 31, No. 6, 949-955, 1983.
doi:10.1109/TAP.1983.1143162

8. Wang, C. J. and C. H. Lin, "A circularly polarized quasi-loop antenna," Progress In Electromagnetics Research, Vol. 84, 333-348, 2008.
doi:10.2528/PIER08081002

9. Huang, C. Y., J. Y. Wu, and K. L. Wong, "Cross-slot-coupled microstrip antenna and dielectric resonator antenna for circular polarization," IEEE Trans. on Antennas and Propagation, Vol. 47, No. 4, 605-609, 1999.
doi:10.1109/8.768798

10. Heidari, A. A., M. Heyrani, and M. Nakhkash, "A dual-band circularly polarized stub loaded microstrip patch antenna for GPS applications," Progress In Electromagnetics Research, Vol. 92, 195-208, 2009.
doi:10.2528/PIER09032401

11. Lau, P. Y., K. K. O. Yung, and E. K. N. Yung, "A low cost printed CP patch antenna for RFID smart bookshelf in library," IEEE Trans. on Industrial Electronics, Vol. 57, No. 5, 1583-1589, May 2010.
doi:10.1109/TIE.2009.2035992

12. Huang, J., "A technique for an array to generate circular polarization with linearly polarized elements," IEEE Trans. on Antennas and Propagation, Vol. 34, No. 9, 1113-1124, 1986.
doi:10.1109/TAP.1986.1143953

13. Sullivan, L. and D. H. Schaubert, "Analysis of an aperture coupled microstrip antenna," IEEE Trans. on Antennas and Propagation, Vol. 34, No. 8, 977-984, 1986.
doi:10.1109/TAP.1986.1143929

14. Chen, R. H. and J. S. Row, "Single-fed microstrip patch antenna with switchable polarization," IEEE Trans. on Antennas and Propagation, Vol. 56, No. 4, 922-826, 2008.
doi:10.1109/TAP.2008.919211

15. Wong, K. L. and J. Y. Wu, "Single-feed small circularly polarised square microstrip antenna," Electronics Letters, Vol. 33, No. 22, 1833-1834, 1997.
doi:10.1049/el:19971299

16. Balanis, C. A., Antenna Theory Analysis and Design, 3rd Ed., Wiley Hoboken, New Jersey, 2005.

Dr. Yuan-Chih Lin

Professor Wen-Shan Chen

Dr. Bau-Yi Lee

Dr. Tzu-Chen Hung

Dr. Chii-Ruey Lin