volume | PIER Journals

Abstract

This work focuses on the design and implementation of a dual-wideband asymmetric square-shaped slot radiator with coplanar waveguide (CPW) feed for circular polarization (CP) characteristics. The proposed radiator has inward ground plane extensions in the form of square and rectangular strips on the diagonal corners of the slot. By optimizing the size of strips, a dual-band antenna with CP behaviour is obtained. The inverted L-shaped grounded strip improves axial ratio bandwidth (ARBW). The extended signal line terminated in a wide tuning stub significantly improves impedance bandwidth (IBW) and ARBW. The designed asymmetric slot radiator is fabricated using an FR-4 substrate material of dimensions 50 × 50 × 1.6 mm³. This antenna design gives flexibility to alter polarization sense at the dual frequency bands. Further, edge effects are analyzed through electric field distribution, and their impact on impedance and AR characteristics are studied. It is designed, fabricated, and tested, and shows right-hand circular polarization (RHCP) response at 3 GHz and 7.5 GHz in the +Z direction. The experimentally verified results show -10-dB impedance bandwidth (IBW) of 40.12% (range from 2.61 GHz to 3.92 GHz) and 40.21% (range from 6 GHz to 9.02 GHz), and 3-dB ARBW are 20% (range from 2.70 GHz to 3.30 GHz) and 40.21% (range from 6 GHz to 9.02 GHz) at the resonance bands. The experimentally measured and simulated performance parameters of the prototype are in close agreement. The proposed perturbed slot radiator is well suited for Wi-Fi 6E communication and remote sensing applications.

1. Guo, Jingli, Hao Bai, Andi Feng, Ying Liu, Youhuo Huang, and Xiang Zhang, "A compact dual-band slot antenna with horizontally polarized omnidirectional radiation," IEEE Antennas and Wireless Propagation Letters, Vol. 20, No. 7, 1234-1238, 2021.

2. Gangwar, Som Pal, Kapil Gangwar, and Arun Kumar, "Dual band modified circular ring shaped slot antenna for GSM and WiMAX applications," Microwave and Optical Technology Letters, Vol. 61, No. 12, 2752-2759, 2019.

3. Yang, HongCai, Yi Fan, and XiongYing Liu, "A compact dual-band stacked patch antenna with dual circular polarizations for BeiDou navigation satellite systems," IEEE Antennas and Wireless Propagation Letters, Vol. 18, No. 7, 1472-1476, 2019.

4. Nguyen Thi, T., K. C. Hwang, and H. B. Kim, "Dual‐band circularly‐polarised Spidron fractal microstrip patch antenna for Ku‐band satellite communication applications," Electronics Letters, Vol. 49, No. 7, 444-445, 2013.

5. Saurav, Kushmanda, Debdeep Sarkar, and Kumar Vaibhav Srivastava, "Dual-band circularly polarized cavity-backed crossed-dipole antennas," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 52-55, 2014.

6. Liang, Weilong, Yong-Chang Jiao, Yuchen Luan, and Chao Tian, "A dual-band circularly polarized complementary antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 1153-1156, 2015.

7. Zou, Meng and Jin Pan, "Wide dual-band circularly polarized stacked rectangular dielectric resonator antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 15, 1140-1143, 2015.

8. Saini, Rohit Kumar, Santanu Dwari, and Mrinal Kanti Mandal, "CPW-fed dual-band dual-sense circularly polarized monopole antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 2497-2500, 2017.

9. Priya, Shruti, Kundan Kumar, and Santanu Dwari, "Substrate integrated waveguide dual-frequency dual-sense circularly polarized cavity-backed slot antenna," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 12, e21987, 2019.

10. Yue, Taiwei, Zhi Hao Jiang, and Douglas H. Werner, "A compact metasurface-enabled dual-band dual-circularly polarized antenna loaded with complementary split ring resonators," IEEE Transactions on Antennas and Propagation, Vol. 67, No. 2, 794-803, 2019.

11. Li, Jianxing, Junwei Shi, Lumei Li, Tayyab Ali Khan, Juan Chen, Yingsong Li, and Anxue Zhang, "Dual-band annular slot antenna loaded by reactive components for dual-sense circular polarization with flexible frequency ratio," IEEE Access, Vol. 6, 64063-64070, 2018.

12. Sze, Jia-Yi and Shien-Piao Pan, "Design of CPW-fed circularly polarized slot antenna with a miniature configuration," IEEE Antennas and Wireless Propagation Letters, Vol. 10, 1465-1468, 2011.

13. Saraswat, Kapil and Ayyangar R. Harish, "Dual‐band CP coplanar waveguide‐fed split‐ring resonator‐loaded G‐shaped slot antenna with wide‐frequency ratio," IET Microwaves, Antennas & Propagation, Vol. 12, No. 12, 1920-1925, 2018.

14. Rajgopal, Sunil Kumar and Satish Kumar Sharma, "Investigations on ultrawideband pentagon shape microstrip slot antenna for wireless communications," IEEE Transactions on Antennas and Propagation, Vol. 57, No. 5, 1353-1359, 2009.

15. Zhou, Shui-Wei, Ping-Hui Li, Yang Wang, Wei-Hua Feng, and Zong-Quan Liu, "A CPW-fed broadband circularly polarized regular-hexagonal slot antenna with L-shape monopole," IEEE Antennas and Wireless Propagation Letters, Vol. 10, 1182-1185, 2011.

16. Singh, Anil Kumar, Shilpee Patil, Binod Kumar Kanaujia, and Vijay Kumar Pandey, "A novel printed circularly polarized asymmetric wide slot antenna for digital cellular system," Microwave and Optical Technology Letters, Vol. 62, No. 3, 1438-1447, 2020.

17. Yang, Wanchen, Si Chen, Wenquan Che, Quan Xue, and Qian Meng, "Compact high-gain metasurface antenna arrays based on higher-mode SIW cavities," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 9, 4918-4923, 2018.

18. Xu, Yizhen, Zhan Wang, and Yuandan Dong, "Circularly polarized slot antennas with dual-mode elliptic cavity," IEEE Antennas and Wireless Propagation Letters, Vol. 19, No. 4, 715-719, 2020.

19. Chen, Rui-Sen, Lei Zhu, Sai-Wai Wong, Jing-Yu Lin, Yin Li, Long Zhang, and Yejun He, "S-band full-metal circularly polarized cavity-backed slot antenna with wide bandwidth and wide beamwidth," IEEE Transactions on Antennas and Propagation, Vol. 69, No. 9, 5963-5968, 2021.

20. Saraswat, Kapil and Ayyangar R. Harish, "Flexible dual‐band dual‐polarised CPW‐fed monopole antenna with discrete‐frequency reconfigurability," IET Microwaves, Antennas & Propagation, Vol. 13, No. 12, 2053-2060, 2019.

21. Birwal, Amit, Sanjeev Singh, Binod Kumar Kanaujia, and Sachin Kumar, "CPW-fed ultra-wideband dual-sense circularly polarized slot antenna," Progress In Electromagnetics Research C, Vol. 94, 219-231, 2019.

22. Xin, Yonghao, Quanyuan Feng, and Jun Tao, "A CPW-fed dual-band slot antenna with circular polarization," Progress In Electromagnetics Research Letters, Vol. 61, 77-83, 2016.

23. Lei, Zhen-Ya, Jiawei Zhang, Rui Yang, Xin Liu, Lei Chen, and Xianghui Kong, "Design of dual-band dual-sense circularly polarized slot antenna," Progress In Electromagnetics Research C, Vol. 43, 41-51, 2013.

24. Xu, R., J.-Y. Li, J. Liu, D.-J. Wei, K. Wei, Y. X. Qi, and J.-J. Yang, "A very simple dual-band dual-sense circularly polarized square slot antenna," 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 123-124, Boston, MA, USA, 2018.

25. Wang, Meng-Shuang, Xiao-Qi Zhu, Yong-Xin Guo, and Wen Wu, "Miniaturized dual-band circularly polarized quadruple inverted-F antenna for GPS applications," IEEE Antennas and Wireless Propagation Letters, Vol. 17, No. 6, 1109-1113, 2018.

26. Lee, Ching-Her, Jun-Wei Huang, and Chung-I. G. Hsu, "Differentially fed dual-band circularly polarized printed slot antenna with high common-mode rejection," Microwave and Optical Technology Letters, Vol. 63, No. 4, 1213-1218, 2021.

27. Wang, Chien-Jen, Meng-Hong Shih, and Ling-Ting Chen, "A wideband open-slot antenna with dual-band circular polarization," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 1306-1309, 2015.

28. Xu, Yanhui, Lei Zhu, and Neng-Wu Liu, "Design approach for a dual-band circularly polarized slot antenna with flexible frequency ratio and similar in-band gain," IEEE Antennas and Wireless Propagation Letters, Vol. 21, No. 5, 1037-1041, 2022.

29. Saini, Rohit Kumar and Pritam Singh Bakariya, "Dual-band dual-sense circularly polarized asymmetric slot antenna with F-shaped feed line and parasitic elements," Progress In Electromagnetics Research M, Vol. 69, 185-195, 2018.

30. Bao, Xiulong and M. J. Ammann, "Dual-frequency dual-sense circularly-polarized slot antenna fed by microstrip line," IEEE Transactions on Antennas and Propagation, Vol. 56, No. 3, 645-649, 2008.

31. Sung, Youngje, "Novel dual-band circularly polarized slot antenna with asymmetrical stubs," Microwave and Optical Technology Letters, Vol. 62, No. 12, 3966-3974, 2020.

32. Kandasamy, Krishnamoorthy, Basudev Majumder, Jayanta Mukherjee, and Kamla Prasan Ray, "Dual-band circularly polarized split ring resonators loaded square slot antenna," IEEE Transactions on Antennas and Propagation, Vol. 64, No. 8, 3640-3645, 2016.

33. Ge, Lei, Chow-Yen-Desmond Sim, Hsin-Lung Su, Jun-Yu Lu, and Chin Ku, "Single‐layer dual‐broadband circularly polarised annular‐slot antenna for WLAN applications," IET Microwaves, Antennas & Propagation, Vol. 12, No. 1, 99-107, 2018.

34. Paul, Princy M., Krishnamoorthy Kandasamy, and Mohammad S. Sharawi, "A corner expanded slot antenna loaded with copper strips for dual-band circular polarization characteristics," Microwave and Optical Technology Letters, Vol. 62, No. 1, 491-497, 2020.

35. Lee, Sungwoo, Youngoo Yang, Kang-Yoon Lee, and Keum Cheol Hwang, "Dual-band circularly polarized annular slot antenna with a lumped inductor for GPS application," IEEE Transactions on Antennas and Propagation, Vol. 68, No. 12, 8197-8202, 2020.

36. Ji, Shuosheng, Yuandan Dong, Sichao Wen, and Yong Fan, "C/X dual-band circularly polarized shared-aperture antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 20, No. 12, 2334-2338, 2021.

37. Xu, Yanhui, Lei Zhu, Neng-Wu Liu, and Mei Li, "A dual-band dual-circularly-polarized slot antenna with stable in-band gain and reduced frequency ratio under triple resonance," IEEE Transactions on Antennas and Propagation, Vol. 70, No. 11, 10199-10206, 2022.

38. Jangid, Monika, Jaiverdhan Jaiverdhan, Sanjeev Yadav, and Mahendra Mohan Sharma, "A CPW fed cross-shaped dual-band circularly polarized monopole antenna with strip/stub/slot resonator loadings," Progress In Electromagnetics Research M, Vol. 109, 113-123, 2022.

39. Wu, Qiong-Sen, Zhi-Keng Lin, Zhi-Xia Du, and Xiao Zhang, "A dual-band dual-sense circularly polarized slot antenna with cascaded non-radiative resonator," IEEE Antennas and Wireless Propagation Letters, 1-5, 2024.

40. Rui, Xu, Jianying Li, and Kun Wei, "Dual-band dual-sense circularly polarised square slot antenna with simple structure," Electronics Letters, Vol. 52, No. 8, 578-580, 2016.

41. Sze, Jia-Yi, Chung-I. G. Hsu, Zhi-Wei Chen, and Chi-Chaan Chang, "Broadband CPW-fed circularly polarized square slot antenna with lightening-shaped feedline and inverted-L grounded strips," IEEE Transactions on Antennas and Propagation, Vol. 58, No. 3, 973-977, 2010.

42. Pourahmadazar, Javad, C. Ghobadi, J. Nourinia, Nader Felegari, and Hamed Shirzad, "Broadband CPW-fed circularly polarized square slot antenna with inverted-L strips for UWB applications," IEEE Antennas and Wireless Propagation Letters, Vol. 10, 369-372, 2011.

43. Balanis, Constantine A., Antenna Theory: Analysis and Design, John Wiley & Sons, 2016.

44. Zheng, Boyu and Zhongxiang Shen, "Effect of a finite ground plane on microstrip-fed cavity-backed slot antennas," IEEE Transactions on Antennas and Propagation, Vol. 53, No. 2, 862-865, 2005.

Mr. Pradeep Hattihalli Shankaraiah

Dr. Neelawar Shekar Vittal Shet

Dr. Krishnamoorthy Kandasamy