volume | PIER Journals

Abstract

This paper introduces a dual-band circularly polarized antenna modeled on an FR4 substrate with an optimized dimension of 48 mm × 29.5 mm × 1.6 mm. A maximum usable circularly polarized bandwidth of 90% is obtained in the lower band (3.08 GHz to 3.75 GHz). A square slot etched in the ground plane loaded with asymmetric plus-shaped slits and tabs aids the impedance bandwidth enhancement. The dual-band operation is accomplished by facilitating parasitic square patches in the slot. The simulated impedance bandwidth of the proposed antenna is 740 MHz (3.07 GHz to 3.81 GHz) for the lower band and 1.57 GHz (4.64 GHz to 6.21 GHz) in the upper band. The impedance and axial ratio bandwidth percentages for lower and upper-frequency bands are 21.5%, 19.6%, and 29.4%, 10.54%, centered at 3.5 GHz and 5.5 GHz, respectively. The simulated and measured results are in reasonably good agreement.

1. James, J. R., P. S. Hall, and C. Wood, Microstrip Antenna, Peter Peregrinus, 1981.
doi:10.1049/PBEW012E

2. Haneishi, M. and S. YYoshida, "A design method of circularly polarised rectangular microstrip antenna by one-point feed," Electronics and Communication, Japan, 1981.

3. Zhao, J.-Y., Z.-Y. Zhang, Y. Li, G. Fu, and S.-X. Gong, "Wideband patch antenna with stable high gain and low cross-polarization characteristics," Progress In Electromagnetics Research Letters, Vol. 45, 35-38, 2014.
doi:10.2528/PIERL14011404

4. Lam, K. Y., K.-M. Luk, K. F. Lee, H. Wong, and K. B. Ng, "Small circularly polarized U-slot wideband patch antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 10, 87-90, 2011.
doi:10.1109/LAWP.2011.2110631

5. Haneishi, M., T. Nambara, and S. Yohsida, "Study on elliptical properties of singly-fed circularly polarised microstrip antennas," Electronics Letters, Vol. 18, 191-193, 1982.
doi:10.1049/el:19820132

6. Chen, W.-L., G.-M. Wang, and C.-X. Zhang, "Bandwidth enhancement of a microstrip-line-fed printed wide-slot antenna with a fractal-shaped slot," IEEE Transactions on Antennas and Propagation, Vol. 57, No. 7, 2176-2179, 2009.
doi:10.1109/TAP.2009.2021974

7. Rahimi, M., M. Maleki, M. Soltani, A. S. Arezomand, and F. B. Zarrabi, "Wide band SRR-inspired slot antenna with circular polarization for wireless application," AEU --- International Journal of Electronics and Communications, Vol. 70, No. 9, 1199-1204, 2016.
doi:10.1016/j.aeue.2016.06.001

8. Cao, R. and S.-C. Yu, "Wideband compact CPW-fed circularly polarized antenna for universal UHF RFID reader," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 9, 4148-4151, 2015.
doi:10.1109/TAP.2015.2443156

9. Yang, F. and Y. Rahmat-Samii, "Switchable dual-band circularly polarised patch antenna with single feed," Electronics Letters, Vol. 37, No. 16, 1002, 2001.
doi:10.1049/el:20010695

10. Beigmohammadi, G., C. Ghobadi, J. Nourinia, and M. Ojaroudi, "Small square slot antenna with circular polarisation characteristics for WLAN/WiMAX applications," Electronics Letters, Vol. 46, No. 10, 672-673, 2010.
doi:10.1049/el.2010.0623

11. Ojaroudi, M., C. Ghobadi, and J. Nourinia, "Small square monopole antenna with inverted t-shaped notch in the ground plane for uwb application," IEEE Antennas and Wireless Propagation Letters, Vol. 8, 728-731, 2009.
doi:10.1109/LAWP.2009.2025972

12. Ellis, M. S., Z. Zhao, J. Wu, X. Ding, Z. Nie, and Q. Liu, "A novel simple and compact microstrip-fed circularly polarized wide slot antenna with wide axial ratio bandwidth for C-band applications," IEEE Transactions on Antennas and Propagation, Vol. 64, No. 4, 1552-1555, 2016.
doi:10.1109/TAP.2016.2526076

13. Wang, L., Y. X. Guo, and W. X. Sheng, "Tri-band circularly polarized annular slot antenna and CNSS applicationsfor GPS ," Journal of Electromagnetic Waves and Applications, Vol. 26, No. 14–15, 1820-1827, 2012.
doi:10.1080/09205071.2012.714451

14. Xu, R., J. Li, Y. Qi, G. W. Yang, and J. Yang, "A design of triple-wideband triple-sense circularly polarized square slot antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 1763-1766, 2017.

15. Niyamanon, S., R. Senathong, and C. Phongcharoenpanich, "Dual-frequency circularly polarized truncated square aperture patch antenna with slant strip and L-shaped slot for WLAN applications," International Journal of Antennas and Propagation, 11, 2018.

16. Deng, I.-C., J.-B. Chen, Q.-X. Ke, J.-R. Chang, W.-F. Chang, and Y. King, "A circular CPW-fed slot antenna for broadband circularly polarized radiation," Microwave Optical Technology Letters, Vol. 49, 2728-2733, 2007.
doi:10.1002/mop.22881

17. Chandu, D. S. and S. S. Karthikeyan, "A novel broadband dual circularly polarized microstrip-fed monopole antenna," IEEE Transactions on Antennas and Propagation, Vol. 65, No. 3, 1410-1415, 2017.
doi:10.1109/TAP.2016.2647705

18. Altaf, A., Y. Yang, K.-Y. Lee, and K. C. Hwang, "Wideband circularly polarized Spidron fractal slot antenna with an embedded patch," International Journal of Antennas and Propagation, 2017.
doi:10.1109/TAP.2016.2647705

19. Ansys HFSS version 2020 R1.

20. Trinh-Van, S., Y. Yang, K.-Y. Lee, and K. C. Hwang, "Broadband circularly polarized slot antenna loaded by a multiple-circular-sector patch," Sensors, Vol. 18, 1576, 2018.
doi:10.3390/s18051576

21. Phongcharoenpanich, K. B. C. and S. Kosulvit, "Dual-band circular plate antenna with annular-ring slot and four-paired rectangular slots," 2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technolog IEEE, 1-4, 2013.

22. Bharath Reddy, G., M. Harish Adhithya, and D. Sriram Kumar, "Simultaneously RHCP and LHCP radiating polarization diversity C-slot antenna for mobile satellite communications," IETE Journal of Research, 2019.
doi:10.1080/03772063.2019.1676665

23. Paul, P. M., K. Kandasamy, and M. S. Sharawi, "A triband circularly polarized strip and SRR-loaded slot antenna," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 10, 5569-5573, 2018.
doi:10.1109/TAP.2018.2854911

Dr. Ramya Radhakrishnan

Dr. Shilpi Gupta