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Presenter: JYUN-NIAN LIN Adviser: Tsung-Fu Chien Date: 2014/3/19

A Novel CP Antenna for UHF RFID Handheld Reader. Chen, Wen-Shan, and Yu-Che Huang. "A Novel CP Antenna for UHF RFID Handheld Reader."  Antennas and Propagation Magazine, IEEE  55.4 (2013): 128-137. Presenter: JYUN-NIAN LIN Adviser: Tsung-Fu Chien Date: 2014/3/19. Outline. Introduction

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Presenter: JYUN-NIAN LIN Adviser: Tsung-Fu Chien Date: 2014/3/19

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  1. A Novel CP Antenna for UHF RFID Handheld Reader Chen, Wen-Shan, and Yu-Che Huang. "A Novel CP Antenna for UHF RFID Handheld Reader." Antennas and Propagation Magazine, IEEE 55.4 (2013): 128-137. Presenter: JYUN-NIAN LIN Adviser: Tsung-Fu Chien Date: 2014/3/19

  2. Outline • Introduction • Antenna Design • Results and Discussion • Conclusion • References

  3. Introduction • RFID (Radio Frequency Identification) • Handheld readers • Circularly polarized (CP)

  4. Antenna Design • Small size

  5. Antenna Design • Circularly polarized

  6. Results and Discussion • HFSS • Return loss

  7. Results and Discussion • Circularly polarized

  8. Results and Discussion •  Impedance match

  9. Results and Discussion

  10. Results and Discussion

  11. Conclusions • A novel circularly polarized antenna was designed for Japanese RFID readers. • Because of its compact size (60 mm × 60 mm × 0.8 mm), the proposed antenna is suitable for use in RFID handheld readers. • In addition, the optimized antenna operated in the desired performance band of 948 MHz to 954 MHz with an axial ratio of less than 3 dB, a return loss of more than 10 dB, and a 3 dB axial-ratio beamwidth larger than 80°, which meets the Japanese RFID system require ments.

  12. References • 1. J. Y. Sze, K. L. Wong, and C. C. Huang, “Coplanar Waveguide-Fed Square Slot Antenna for Broadband Circular Polarization Radiation,” IEEE Transactions on Antennas and Propagation, AP-51, 8, August, 2003, pp. 2141-2144. • 2. K. L. Wong, C. C. Huang, and W. S. Chen, “Printed Ring Slot Antenna for Circular Polarization,” IEEE Transactions on Antennas and Propagation, AP-50, 1, January, 2002, pp. 75-77. • 3. W. S. Chen, C. K. Wu, and K. L. Wong, “Single-Feed Square-Ring Microstrip Antenna with Truncated Corners for Compact Circular Polarization Operation,” Electronics Let ters, 34, 11, May, 1998, pp. 1045-1047. • 4. K. P. Yang and K. L. Wong, “Dual-Band Circularly-Polar ized Square Microstrip Antenna,” IEEE Transactions on Antennas and Propagation, AP-49, 3, March, 2001, pp. 377-382. • 5. C. F. Jou, J. W. Wei, and C. J. Wang, “Novel Broadband Monopole Antennas with Dual-Band Circular Polarization,” IEEE Transactions on Antennas and Propagation, AP-57, 4, April, 2009, pp. 1027-1034.

  13. References • 6. Y. Wang, Z. Shen, S. Aditya, and C. L. Law, “A MonopoleAntenna Fed by a Rectangular Waveguide,” IEEE Interna tional Symposium on Antennas and Propagation, July 3-8, 2005, pp.728-731. • 7. D. Z. Kim, H. S. Tae, K. S. Oh, M. Q. Lee, and J. W. Yu,“Helical Refl ector Antenna with a Wideband CP for RFID Reader,” IEEE Asia-Pacifi c Microwave Conference, Decem ber 7-10, 2009, pp. 1032-1035. • 8. H. L. Chung, X. Qing, and Z. N. Chen, “Broadband Circularly Polarized Stacked Patch Antenna for UHF RFID Applications,” IEEE International Symposium on Antennas and Propagation, June 9-15, 2007, pp. 1189-1192. • 9. H. W. Kwa, X. Qing, and Z. N. Chen, “Broadband Single-Fed Single-Patch Circularly Polarized Antenna for UHF RFID Applications,” IEEE International Symposium on Antennas and Propagation, pp. 1-4, July 5-11, 2008. • 10. C. A. Balanis, Antenna Theory: Analysis and Design, Third

  14. Thank You For Your Attention

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