volume | PIER Journals

Abstract

In this letter, a new wideband circularly polarized antenna for Radio Frequency Identification (RFID) readers is proposed. A prototype operating in the Ultra-High Frequency (UHF) band is successfully realized and tested using a defected Ground Structure (DGS). This antenna consists of an L-shaped metal strip and a DGS with four tuning stubs. The overall size covers 90*90*1.6 mm³. The measured -10 dB reflection coefficient S₁₁ bandwidth is 27% (800-1020 MHz) and a good radiation pattern and suitable gain coefficient about 3.7 dB have been achieved. Also, an excellent agreement was noticed between simulation and measurement results demonstrating the good performance of the proposed antenna.

1. Wang, Z., S. Fang, S. Fu, and S. Jia, "Single-fed broadband circularly polarized stacked patch antenna with horizontally meandered strip for universal UHF RFID applications," IEEE Transactions on Microwave Theory and Techniques, Vol. 59, No. 4, 1066-1073, 2011.
doi:10.1109/TMTT.2011.2114010 Google Scholar

2. Chen, H.-M., K.-Y. Chiu, Y.-F. Lin, and S.-A. Yeh, "Circularly polarized slot antenna design and analysis using magnetic current distribution for RFID reader applications," Microwave and Optical Tech. Letters, Vol. 54, No. 9, 2016-2023, doi: 10.1002/mop, 2012.
doi:10.1002/mop.27013 Google Scholar

3. Lee, D. H., P. J. Park, J. P. Kimand, and J. H. Choi, "Aperture-coupled UHF reader antenna for a handheld application," Micro. Opt. Technol. Lett., Vol. 50, 1261-1263, May 2008.
doi:10.1002/mop.23349 Google Scholar

4. Chang, T. N. and J. M. Lin, "A novel circularly polarized patch antenna with serial multislot type loading," IEEE Trans. Antennas Propag., Vol. 55, 3345-3348, Nov. 2007. Google Scholar

5. Tang, Z. J. and Y. G. He, "Broadband microstrip antenna with U and T slots for 2.45/2.41 GHz RFID tag," Electronic Letters, Vol. 45, No. 18, 926-928, 2009, doi: 10.1049/el.2009.0387.
doi:10.1049/el.2009.0387 Google Scholar

6. Nasimuddin, Z. N. Chen and X. Qing, "Slotted microstrip antennas for circular polarization with compact size," IEEE Antennas Propag. Mag., Vol. 55, No. 2, 124-137, 2013.
doi:10.1109/MAP.2013.6529322 Google Scholar

7. Oraizi, H. and S. Hedayati, "Miniaturized UWB monopole microstrip antenna design by the combination of Giuseppe Peano and Sierpinski Carpet fractals," Antennas Wirel. Propag. Lett., Vol. 10, 67-70, 2011.
doi:10.1109/LAWP.2011.2109030 Google Scholar

8. Lamminen, A. E. I., A. R. Vimpari, and J. Saily, "UC-EBG on LTCC for 60-GHz frequency band antenna applications," IEEE Trans. Antennas Propag., Vol. 57, No. 10, 2904-2912, 2009.
doi:10.1109/TAP.2009.2029311 Google Scholar

9. Wong, K. L., Compact and Broadband Microstrip Antennas, 1st Ed., Wiley, NJ, 2002.
doi:10.1002/0471221112

10. Kumar, C. and D. Guha, "Linearly polarized elliptical microstrip antenna with improved polarization purity and bandwidth characteristics," Microw. Opt. Technol. Lett., Vol. 54, No. 10, 2309-2314, 2012.
doi:10.1002/mop.27056 Google Scholar

11. Prajapati, P. R., G. G. K. Murthy, A. Patnaik, and M. V. Kartikeyan, "Design of compact circular disc circularly polarized antenna with Koch curve fractal defected ground structure," Proc. of 31st Int. Union of Radio Science General Assembly and Scientific Symp., (URSI GASS 2014), Beijing, China, August 2014. Google Scholar

12. Zhang, C., J. Zhang, and L. Li, "Triple band-notched UWB antenna based on SIR-DGS and fork-shaped stubs," Electronics Letters, Vol. 50, No. 2, 67-69, 2014.
doi:10.1049/el.2013.2513 Google Scholar

13. Chi, P.-L. and T. Itoh, "Antenna miniaturization using slow wave enhancement factor from loaded transmission line models," IEEE Trans. Antennas Propag., Vol. 59, No. 1, 48-57, 2011.
doi:10.1109/TAP.2010.2090452 Google Scholar

14. Kim, H.-M. and B. Lee, "Bandgap and slow/fast wave characteristics of defected ground structures including lefthanded features," IEEE Trans. Microw. Theory Tech., Vol. 54, No. 7, 3113-3120, 2006.
doi:10.1109/TMTT.2006.877060 Google Scholar

15. Biswas, S., D. Guha, and C. Kular, "Control of higher harmonics and their radiation in microstrip antennas using compact defected ground structures," IEEE Trans. Antennas Propag., Vol. 61, No. 6, 3349-3354, 2013.
doi:10.1109/TAP.2013.2250240 Google Scholar

16. Nashaat, D., H. A. Elsadek, E. Abdallah, H. Elhenawy, and M. F. Iskander, "Multiband and miniaturized inset feed microstrip patch antenna using multiple spiral-shaped defected ground structure (DGS)," Proc. Of IEEE Antennas and Propagation Society Int. Symp., (APSURSI’09), 164, Charleston, South Carolina, 2009. Google Scholar

17. Guha, D., S. Biswas, and C. Kumar, "Annular ring shaped DGS to reduce mutual coupling between two microstrip patches," Proc. of IEEE Applied Electromagnetics Conf. (AEMC), 1-3, Kolkata, India, 2009. Google Scholar

18. Cheng, K. S., E.-H. Lim, and Y.-N. Phua, "Circularly polarized suspended patch antenna fed by modified L-Probe for UHF RFID Reader," Radio Engineering, Vol. 26, No. 4, December 2017. Google Scholar

19. Pan, Y., L. Zheng, H. J. Liu, J. Y. Wang, and R. L. Li, "Directly-fed single-layer wideband RFID reader antenna," Electronic Letters, Vol. 48, No. 11, May 24, 2012. Google Scholar

20. Lin, S.-Y. and Y.-C. Lin, "Printed RFID Reader Antenna with circular polarization and optical technology Letters,", Vol. 000, No. 000, December 2012, DOI 10.1002/mop. Google Scholar

Dr. Marwa Zamali

Prof. Lotfi Osman

Dr. Hedi Raggad

Dr. Mohamed Latrach