volume | PIER Journals

Abstract

In this paper, a low-profile wide bandwidth circularly polarized microstrip antenna is proposed as element for a C-band airborne circularly polarized synthetic aperture radar sensor. Several bandwidth improvement techniques were proposed and implemented. In order to increase impedance bandwidth, the antenna is constructed using double-stacked substrate with low dielectric constant, modified radiating shape for multi-resonant frequency, and a circle-slotted parasitic patch. Generation of the circularly polarized wave employs a simple square patch with curve corner-truncation as radiating element. The asymmetric position of the feeding is attempted to improve the axial-ratio bandwidth. To avoid a complicated feed network, the antenna is fed by single-feed proximity-coupled microstrip line. The effect of copper-covering on the upper layer for decrease undesired radiation wave emitted by the feeding is also studied and presented. Measurement results show that the impedance bandwidth and axial ratio bandwidth are 20.9% (1,100 MHz) and 4.7% (250 MHz), respectively. Meanwhile the measured gain is 7 dBic at the frequency of 5.3 GHz.

1. Sri Sumantyo, J. T., K. V. Chet, L. T. Sze, T. Kawai, T. Ebinuma, Y. Izumi, M. Z. Baharuddin, S. Gao, and K. Ito, "Development of circular polarized synthetic aperture radar onboard UAV JX-1," International Journal of Remote Sensing, Vol. 38, No. 8-10, 2745-2756, 2017.
doi:10.1080/01431161.2016.1275057

2. Ouchi, K., "Recent trend and advance of synthetic aperture radar with selected topics," Remote Sensing, Vol. 5, No. 2, 716-807, 2013.
doi:10.3390/rs5020716

3. Gail, W. B., "Effect of faraday rotation on polarimetric SAR," IEEE Int. Transactions on Aerospace and Electronic System, Vol. 34, No. 1, 301-307, 1998.
doi:10.1109/7.640287

4. Gao, S., Q. Luo, and F. Zhu, Circularly Polarized Antenna, John Willey Sons, 2014.
doi:10.1002/9781118790526

5. Balanis, C. A., Antenna Theory Analysis and Design, 3rd Ed., A John Willey and Sons, 2005.

6. James, J. R. and P. S. Hall, Handbook of Microstrip Antennas, Peter Peregrinus Ltd, London, UK, 1989.

7. Stutzman, W. L. and G. A. Thiele, Antenna Theory and Design, 2nd Ed., John Wiley and Sons, 1998.

8. Carver, K. R. and J. W. Mink, "Microstrip antenna technology," IEEE Transactions on Antennas and Propagation, Vol. 29, No. 1, 2-24, 1981.
doi:10.1109/TAP.1981.1142523

9. Hung, K. F. and Y. C. Lin, "Novel broadband circularly polarized cavity-backed aperture antenna with traveling wave excitation," IEEE Transactions on Antenna and Propagation, Vol. 58, No. 1, 35-42, 2009.
doi:10.1109/TAP.2009.2036187

10. Davidson, K., Y. Antar, and A. Freundorfer, "A wideband via fed circularly polarized microstrip antenna on a multi-layer substrate," IEEE Antennas and Propagation Society International Symposium, APS-URSI 2013, Vol. 9, No. 6, 1468-1469, 2013.
doi:10.1109/APS.2013.6711393

11. Singh, D. K., B. K. Kanaujia, S. Dwari, G. P. Pandey, and S. Kumar, "Multiband circularly polarized stacked microstrip antenna," Progress In Electromagnetic Research C, Vol. 56, 55-65, 2015.
doi:10.2528/PIERC14121101

12. Lai, H. W., D. Xue, H. Wong, K. K. So, and X. Y. Zhang, "Broadband circularly polarized patch antenna arrays with multiple layers structure," IEEE Antenna and Wireless Propagation Letters, Vol. 16, 525-528, 2017.
doi:10.1109/LAWP.2016.2587302

13. Pozar, D. M. and B. Kaufman, "Increasing the bandwidth of a microstrip antenna by proximity coupling," Electronics Letters, Vol. 23, No. 8, 368-369, 2007.
doi:10.1049/el:19870270

14. Sharma, P. C. and K. C. Gupta, "Analysis and optimized design of single feed circularly polarized microstrip antennas," IEEE Transactions on Antenna and Propagation, Vol. 31, No. 6, 949-955, 1983.
doi:10.1109/TAP.1983.1143162

15. Chung, K. L. and A. S. Mohan, "A systematic design method to obtain broadband characteristics for singly-fed electromagnetically coupled patch antennas for circularly polarization," IEEE Transactions on Antenna and Propagation, Vol. 51, No. 12, 3239-3248, 2003.
doi:10.1109/TAP.2003.820949

16. Wu, J., X. Ren, Z. Wang, and Y. Yin, "Broadband circularly polarized antenna with L-shaped strip feeding and shorting-pin loading," IEEE Antenna and Wireless Propagation Letters, Vol. 13, 1733-1736, 2015.

17. Targonski, S. D. and M. Pozar, "Design of wideband circularly polarized aperture-coupled microstrip antennas," IEEE Transactions on Antenna and Propagation, Vol. 41, No. 2, 214-220, 1993.
doi:10.1109/8.214613

18. Sze, J. Y. and W. H. Chen, "Axial ratio bandwidth enhancement of a microstrip-line-fed circularly polarized annular-ring slot antenna," IEEE Transactions on Antenna and Propagation, Vol. 59, No. 7, 2450-2456, 2011.
doi:10.1109/TAP.2011.2152314

19. Saini, R. K. and S. Dwari, "A broadband dual circularly polarized square slot antenna," IEEE Transactions on Antenna and Propagation, Vol. 64, No. 1, 290-294, 2015.
doi:10.1109/TAP.2015.2496118

20. Gyasi, K. O., G. Wen, Y. Huang, E. Affum, and W. Hu, "Broadband circularly polarized cross shaped slot antenna with an improved feedline," Progress In Electromagnetics Research C, Vol. 74, 141-149, 2017.

21. Ding, K., C. Gao, T. Yu, D. Qu, and B. Zhang, "Gain-improved broadband circularly polarized antenna array with parasitic patches," IEEE Antenna and Wireless Propagation Letters, Vol. 16, 1468-1471, Dec. 2016.

22. Fu, S., Q. Kong, S. Fang, and Z. Wang, "Broadband circularly polarized microstrip antenna with coplanar parasitic ring slot patch for L-band satellite system application," IEEE Antenna and Wireless Propagation Letters, Vol. 13, No. 1, 943-946, 2014.

23. Sung, Y., "Bandwidth enhancement of a microstrip line-fed printed wide-slot antenna with parasitic center patch," IEEE Transactions on Antenna and Propagation, Vol. 60, No. 4, 1712-1716, 2012.
doi:10.1109/TAP.2012.2186224

24. Yohandri, V. W., I. Firmansyah, P. Rizki Akbar, J. T. Sri Sumantyo, and H. Kuze, "Development of circularly polarized array antenna for synthetic aperture radar broadband sensor installed on UAV," Progess In Electromagnetics Research C, Vol. 19, 119-133, 2011.
doi:10.2528/PIERC10121708

25. Baharuddin, M. Z. and J. T. S. Sumantyo, "Suppressed side-lobe, beam steered, C-band circularly polarized array antenna for airborne synthetic aperture radar," The Journal of Unmanned System Technology, Vol. 4, No. 1, 2016.

26. Yang, W., J. Zhou, Z. Yu, and L. Li, "Single-fed low profile broadband circularly polarized stacked patch antenna," IEEE Transactions on Antenna and Propagation, Vol. 62, No. 10, 5406-5410, 2014.
doi:10.1109/TAP.2014.2344657

27. Ding, K., C. Gao, D. Qu, and Q. Yin, "Compact broadband circularly polarized antenna with parasitic patches," IEEE Transactions on Antenna and Propagation, Vol. 65, 2017.
doi:10.1109/TAP.2017.2738068

28. Rafii, V., J. Nourinia, C. Ghobadi, J. Pourahmadazar, and B. S. Virdee, "Broadband circularly polarized slot antenna array using sequential rotated technique for C-band application," IEEE Antenna and Propagation Letters, Vol. 12, No. 1921, 128-131, 2013.
doi:10.1109/LAWP.2013.2237744

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

30. Zhang, H., Y. C. Jiao, L. Lu, and C. Zhang, "Broadband circularly polarized square-ring-loaded slot antenna with flat gains," IEEE Antenna and Wireless Propagation Letters, Vol. 16, No. 99, 29-32, 2017.
doi:10.1109/LAWP.2016.2553109

Dr. Cahya Edi Santosa

Prof. Josaphat Tetuko Sri Sumantyo

Dr. Katia Urata

Dr. Chua Ming Yam

Prof. Koichi Ito

Prof. Steven Gao