This paper proposes a microstrip-fed simple square slot patch antenna, which produces a triple band and is circularly polarized. The designed antenna consists of an L-shaped patch radiator in which the lower part of L is modified to a circle instead of a rectangle, and two rectangular strips are inserted from the opposite corners of the ground plane. Two small rectangular slits have also been used in the design to generate the triple band and widen the bandwidth too. The antenna has been fabricated and measured and it shows a good agreement between them. The measured impedance bandwidths (IBWs) are 44.06% (2.3-3.6 GHz) and 73.68% (4.8-10.4 GHz), and the axial ratio bandwidths (ARBWs) are 37.29% (2.4-3.5 GHz), 13.6% (4.8-5.5 GHz), and 32.35% (5.7-7.9 GHz) in the lower, middle and upper band respectively.
2. Behera, H. K., M. Midya, and L. P. Mishra, "Performance enhancement of a compact circularly polarized slot antenna using corner truncation," Progress In Electromagnetics Research C, Vol. 126, 197-206, 2022.
doi:10.2528/PIERC22083102
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7. 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, Oct. 2018.
doi:10.1109/TAP.2018.2854911
8. Midya, M., S. Bhattacharjee, and M. Mitra, "CPW-fed dual-band dual-sense circularly polarized antenna for WiMAX application," Progress In Electromagnetics Research Letters, Vol. 81, 113-120, 2019.
doi:10.2528/PIERL18091306
9. Saini, R. K., S. Dwari, and M. K. Mandal, "CPW-fed dual-band dual-sense circularly polarized monopole antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 2497-2500, 2017.
doi:10.1109/LAWP.2017.2726545
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11. Baek, J. G. and K. C. Hwang, "Triple-band unidirectional circularly polarized hexagonal slot antenna with multiple L-shaped slits," IEEE Transactions on Antennas and Propagation, Vol. 61, No. 9, 4831-4835, Sept. 2013.
doi:10.1109/TAP.2013.2265216
12. Midya, M., S. Bhattacharjee, and M. Mitra, "Triple-band dual-sense circularly polarised planar monopole antenna," IET Microwaves, Antennas & Propagation, Vol. 13, No. 12, 2020-2025, 2019.
doi:10.1049/iet-map.2019.0052
13. Singh, G., B. K. Kanaujia, V. K. Pandey, D. Gangwar, and S. Kumar, "Design of compact dual-band patch antenna loaded with D-shaped complementary split ring resonator," Journal of Electromagnetic Waves and Applications, Vol. 16, No. 18, 1-16, 2019.
14. Chatterjee, A., M. Midya, L. P. Mishra, and M. Mitra, "Compact dual polarized branch-line printed inverted-F antenna covering both cellular and non-cellular bands with independent tuning," Progress In Electromagnetics Research C, Vol. 101, 95-104, 2020.
doi:10.2528/PIERC20030408
15. Bag, B., P. Biswas, R. Mondal, S. Biswas, and P. P. Sarkar, "Dual-band dual-sense circularly polarized U- and L-shaped strip monopole antenna for WiMAX/WLAN applications," Journal of Electromagnetic Waves and Applications, Vol. 16, No. 18, 1-15, 2019.
16. Midya, M., S. Bhattacharjee, G. K. Das, and M. Mitra, "Dual-band dual-polarized compact planar monopole antenna for wide axial ratio bandwidth application," International Journal of RF and Microwave Computer-Aided Engineering, e22152, 2020.
17. Xu, R., J. Li, Y.-X. Qi, G. W. Yang, and J.-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.
18. Behera, H. K. and L. P. Mishra, "Comparison of different shapes for micro-strip antenna design. Advances in intelligent computing and communication," Lecture Notes in Networks and Systems, Vol. 430, Springer, Singapore, 2022.
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