volume | PIER Journals

Abstract

A gap-coupled design of elliptical shape microstrip antennas for wideband circularly polarized response is proposed. The wideband nature of the response is attributed to the gap-coupling between the orthogonal resonant modes on the fed and parasitic elliptical shape patches. With the total substrate thickness of 0.11λ_cAR, the gap-coupled antenna offers the reflection coefficient bandwidth of 784 MHz (55.68%) that includes circularly polarized bandwidth for axial ratio ≤3 dB of 542 MHz (35.82%). The antenna offers a broadside radiation pattern across the bandwidth, with a peak gain larger than 10 dBi. A design methodology to realize a similar gap-coupled antenna in a different frequency range is presented that yields similar wideband results. With the obtained antenna characteristics, proposed designs will find applications in GPS L and GSM 900 frequency bands. An experimental verification for the obtained simulated results is carried out, which provides a close agreement.

1. Wong, Kin-Lu, Compact and Broadband Microstrip Antennas, John Wiley & Sons, 2004.

2. Garg, Ramesh, Microstrip Antenna Design Handbook, Artech House, 2001.

3. Balanis, Constantine A., Antenna Theory: Analysis and Design, John Wiley & Sons, 2015.

4. Kumar, Girish and Kamala Prasan Ray, Broadband Microstrip Antennas, Artech House, 2002.

5. Wang, Meng-Shuang, Xiao-Qi Zhu, Yong-Xin Guo, and Wen Wu, "Compact circularly polarized patch antenna with wide axial-ratio beamwidth," IEEE Antennas and Wireless Propagation Letters, Vol. 17, No. 4, 714-718, 2018.

6. Ray, Mrityunjoy Kumar, Kaushik Mandal, and Nasimuddin Nasimuddin, "Low-profile circularly polarized patch antenna with wide 3 dB beamwidth," IEEE Antennas and Wireless Propagation Letters, Vol. 18, No. 12, 2473-2477, 2019.

7. Zhang, Xiao and Lei Zhu, "High-gain circularly polarized microstrip patch antenna with loading of shorting pins," IEEE Transactions on Antennas and Propagation, Vol. 64, No. 6, 2172-2178, 2016.

8. Zhang, Xiao, Lei Zhu, and Neng-Wu Liu, "Pin-loaded circularly-polarized patch antennas with wide 3-dB axial ratio beamwidth," IEEE Transactions on Antennas and Propagation, Vol. 65, No. 2, 521-528, 2017.

9. Deshmukh, Amit A. and Kamla P. Ray, "Circularly polarized designs of modified isosceles triangular microstrip antennas," Engineering Reports, Vol. 2, No. 10, e12250, 2020.

10. Shi, Yuzhong and Juhua Liu, "A circularly polarized octagon-star-shaped microstrip patch antenna with conical radiation pattern," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 4, 2073-2078, 2018.

11. Lee, Kai Fong, Kwai Man Luk, Wing Chi Mok, and Payam Nayeri, "Single probe‐fed circularly polarized patch antennas with U‐slots," Microwave and Optical Technology Letters, Vol. 53, No. 6, 1245-1253, 2011.

12. Chen, Yikai and Chao-Fu Wang, "Characteristic-mode-based improvement of circularly polarized U-slot and E-shaped patch antennas," IEEE Antennas and Wireless Propagation Letters, Vol. 11, 1474-1477, 2012.

13. Khidre, Ahmed, Kai Fang Lee, Fan Yang, and Atef Elsherbeni, "Wideband circularly polarized E-shaped patch antenna for wireless applications," IEEE Antennas and Propagation Magazine, Vol. 52, No. 5, 219-229, 2010.

14. Kovitz, Joshua M., Harish Rajagopalan, and Yahya Rahmat-Samii, "Design and implementation of broadband MEMS RHCP/LHCP reconfigurable arrays using rotated E-shaped patch elements," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 6, 2497-2507, 2015.

15. Kovitz, Joshua M., Harish Rajagopalan, and Yahya Rahmat-Samii, "Circularly polarised half E‐shaped patch antenna: A compact and fabrication‐friendly design," IET Microwaves, Antennas & Propagation, Vol. 10, No. 9, 932-938, 2016.

16. Wei, Kun, J. Y. Li, L. Wang, R. Xu, and Z. J. Xing, "A new technique to design circularly polarized microstrip antenna by fractal defected ground structure," IEEE Transactions on Antennas and Propagation, Vol. 65, No. 7, 3721-3725, 2017.

17. Wei, Kun, Bocheng Zhu, and Mingliang Tao, "The circular polarization diversity antennas achieved by a fractal defected ground structure," IEEE Access, Vol. 7, 92030-92036, 2019.

18. Ambekar, Aarti G. and Amit A. Deshmukh, "Low profile design of regular shape microstrip antennas backed by fractal slots cut ground plane for circular polarized response," Progress In Electromagnetics Research C, Vol. 129, 203-219, 2023.

19. Liang, Zhuo-Xian, De-Cao Yang, Xing-Chang Wei, and Er-Ping Li, "Dual-band dual circularly polarized microstrip antenna with two eccentric rings and an arc-shaped conducting strip," IEEE Antennas and Wireless Propagation Letters, Vol. 15, 834-837, 2015.

20. Kumar, Pawan, Santanu Dwari, Rohit Kumar Saini, and Mrinal Kanti Mandal, "Dual-band dual-sense polarization reconfigurable circularly polarized antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 18, No. 1, 64-68, 2019.

21. Deshmukh, Amit A. and Anuja Arun Odhekar, "Dual band circularly polarized modified ψ-shape microstrip antenna," Progress In Electromagnetics Research C, Vol. 115, 161-174, 2021.

22. Mondal, Tapas, Sandip Maity, Rowdra Ghatak, and Sekhar Ranjan Bhadra Chaudhuri, "Design and analysis of a wideband circularly polarised perturbed psi-shaped antenna," IET Microwaves, Antennas & Propagation, Vol. 12, No. 9, 1582-1586, Jul. 2018.

23. Zeng, Jianping, Xiuye Liang, Lianxing He, Fang Guan, Feng Han Lin, and Jian Zi, "Single-fed triple-mode wideband circularly polarized microstrip antennas using characteristic mode analysis," IEEE Transactions on Antennas and Propagation, Vol. 70, No. 2, 846-855, Feb. 2022.

24. Lin, Jiang-Feng and Qing-Xin Chu, "Enhancing bandwidth of CP microstrip antenna by using parasitic patches in annular sector shapes to control electric field components," IEEE Antennas and Wireless Propagation Letters, Vol. 17, No. 5, 924-927, May 2018.

25. Chen, Jianhong, Cheng Jin, Binchao Zhang, and Zhongxiang Shen, "Combined triangle quarter-wavelength patches and their application to high-gain CP antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 19, No. 1, 104-108, Jan. 2019.

26. Wu, Qiong-Sen, Xiao-Yu Tang, Xiao Zhang, Lei Zhu, Gary Zhang, and Chun-Bing Guo, "Circularly-polarized patch antennas with enhanced bandwidth based on capacitively coupled orthogonal patch radiators," IEEE Open Journal of Antennas and Propagation, Vol. 4, 472-483, 2023.

27. Cheng, Guangshang, Baoqing Huang, Zhixiang Huang, and Lixia Yang, "A high-gain circularly polarized filtering stacked patch antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 22, No. 5, 995-999, 2023.

28. Deshmukh, Amit A., Akshay Doshi, and Anuja A. Odhekar, "Gap-coupled designs of star shape microstrip antennas for dual band and wide band circular polarized response," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 5, e21664, 2019.

29. Deshmukh, Amit A., Venkata A. P. Chavali, and Aarti G. Ambekar, "Circularly polarized gap-coupled designs of modified square microstrip antennas for WLAN and bluetooth applications," Progress In Electromagnetics Research C, Vol. 138, 233-246, 2023.

30. Verma, Anamika, Mahima Arrawatia, and Girish Kumar, "High gain wideband circularly polarized microstrip antenna array," IEEE Transactions on Antennas and Propagation, Vol. 70, No. 11, 11183-11187, 2022.

31. CST Software Version 2019.

32. Toh, Bee Yen, Robert Cahill, and Vincent F. Fusco, "Understanding and measuring circular polarization," IEEE Transactions on Education, Vol. 46, No. 3, 313-318, Aug. 2003.

Professor Amit A. Deshmukh

Dr. Heet Mistry

Professor Venkata A. P. Chavali