volume | PIER Journals

Abstract

This research paper introduces a novel dual-band single-polarized (DBSP) series-fed center-fed open stub (SFCFOS) Binomial Antenna Array synthesis technique to improve side lobe levels (SLL) and better isolation for the use in Airborne Synthetic Aperture Radars (AIR-SARs). The antenna utilizes a shared-aperture array (SAA) architecture, operating in both X and Ku-bands with center frequencies of 9.3 and 13.265 GHz with a frequency ratio of 1:1.426. The SAA consists of a 7-element linear array of square microstrip patches for the X/Ku-band. The inter-element spacing between patches is set at 0.7λ to meet the ±25˚ scan range requirements. The X-band (9.3 GHz) frequency is ideal for soil moisture estimation in agricultural areas, while the Ku-band (13.265 GHz) is suitable for applications in snow-covered regions, cold areas, and disaster monitoring. To validate the antenna design, a prototype is fabricated and tested for S-parameters, radiation characteristics, and gain measurements. The size of the shared-aperture antenna is 200 mm × 50 mm × 0.787 mm. The measured results of the prototype align well with the simulated ones, exhibiting excellent radiation performance and high isolation. The bandwidth of 1.07% (X-band) and 1.5% (Ku-Band) and return loss of 25 dB/-15.7 dB at 9.3/13.265 GHz are achieved. The measured isolation is -45 dB which provides a large signal separation at X/Ku-bands. The antenna design shows a side-lobe level (SLL) of -39.5 dB at E-Plane (φ=0˚) and -17.9 dB for H-plane (φ=90˚) for the X-band and -35 dB at φ=0˚-19 dB for H-plane (φ=90˚) for the Ku-band. Additionally, it achieves high gain values of 12.8 dBi for the X-band and 13.2 dBi for the Ku-band. This research presents the first reported shared-aperture X/Ku-band single polarized planar array with binomial amplitude distribution synthesis technique, which holds significant value for AIR-SAR applications. All the measured results were in line with simulated ones and matched reasonably well.

1. Moreira, L., P. Prats-Iraola, M. Younis, G. Krieger, I. Hajnsek, and K. Pa-Athanasiou, "A tutorial on synthetic aperture radar," IEEE Geoscience and Remote Sensing Magazine (GRSM), Vol. 1, 6-43, Mar. 2013.
doi:10.1109/MGRS.2013.2248301 Google Scholar

2. Skolnik, M. I., Radar Handbook, 3rd Edition, 1.1{24.1, McGraw-Hill, New York, 1970.

3. Drinkwater, M. R., R. Kwok, and E. Rignot, "Synthetic aperture radar polarimetry of sea ice," Digest | International Geoscience and Remote Sensing Symposium (IGARSS), Vol. 2, 1525-1528, 1990.
doi:10.1109/TGRS.1986.289673 Google Scholar

4. Lynne, G. J. and G. R. Taylor, "Geological assessment of SIRB imagery of the Amadeus basin, N.T., Australia," IEEE Trans. Geosci. Remote Sens., Vol. 24, No. 4, 575-581, 1986. Google Scholar

5. Hovland, H. A., J. A. Johannessen, and G. Digranes, "Slick detection in SAR images," International Geoscience and Remote Sensing Symposium (IGARSS), Vol. 4, 2038-2040, 1994. Google Scholar

6. Walker, B., G. Sander, M. Thompson, B. Burns, R. Fellerhoff, and D. Dubbert, "High-resolution, four-band SAR testbed with real-time image formation," International Geoscience and Remote Sensing Symposium (IGARSS), Vol. 3, 1881-1885, 1996.
doi:10.1163/156939306779292192 Google Scholar

7. Storvold, R., E. Malnes, Y. Larsen, K. A. Hogda, S. E. Hamran, K.Muller, and K. A. Langley, "SAR remote sensing of snow parameters in Norwegian areas --- Current status and future perspective," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 13, 1751-1759, 2006.
doi:10.2528/PIER90010100 Google Scholar

8. Kong, J. A., S. H. Yueh, H. H. Lim, R. T. Shin, and J. J. van Zyl, "Classification of earth terrain using polarimetric synthetic aperture radar images," Progress In Electromagnetic Research, Vol. 3, 327-370, 1990.
doi:10.1109/36.406669 Google Scholar

9. Jordan, R. L., B. L. Huneycutt, and M. Werner, "The SIR-C/X-SAR synthetic aperture radar system," IEEE Trans. Geosci. Remote Sens., Vol. 33, No. 4, 829-839, 1995. Google Scholar

10. Axness, T. A., R. V. Coffman, B. A. Kopp, and K. W. O'Haver, "Shared aperture technology development," Johns Hopkins APL Tech. Dig., Vol. 17, No. 3, 285-293, 1996. Google Scholar

11. Balanis, C. A., Antenna Theory: Analysis and Design. Antennas & Propagation, 4th Edition, Wiley, Hoboken, 1997.
doi:10.1109/TAP.2012.2207034

12. Zhong, S.-S., Z. Sun, L.-B. Kong, C. Gao, W. Wang, and M.-P. Jin, "Tri-band dual polarization shared-aperture microstrip array for SAR applications," IEEE Transactions on Antennas and Propagation, Vol. 60, 4157-4165, Sep. 2012.
doi:10.1109/LAWP.2021.3102104 Google Scholar

13. Zhou, C., S. Yuan, H. Li, B. Wang, and H. Wong, "Dual-band shared-aperture antenna with bifunctional metasurface," IEEE Antennas and Wireless Propagation Letters, Vol. 20, No. 10, 2013-2017, 2021.
doi:10.1109/APS/URSI47566.2021.9704250 Google Scholar

14. Liu, Y., Y. J. Cheng, and Y. Fan, "A dual-layer Ku/Ka dual-band shared-aperture re ectarray antenna based on structure-reuse technique," 2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI), 1925-1926, 2021.
doi:10.1109/TAP.2020.2970096 Google Scholar

15. Bai, C. X., Y. J. Cheng, Y. R. Ding, and J. F. Zhang, "A metamaterial-based S/X-band shared-aperture phased-array antenna with wide beam scanning coverage," IEEE Transactions on Antennas and Propagation, Vol. 68, No. 6, 4283-4292, 2020. Google Scholar

16. Liu, L. Y., Y. J. Cheng, and L. Wang, "Dual-polarized Ku-band and single-polarized Ka-band shared-aperture phased array antenna," 2021 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 1-3, May 2021.
doi:10.1109/TAP.2022.3146867 Google Scholar

17. Ding, Y. R., Y. J. Cheng, J. X. Sun, L. Wang, and T. J. Li, "Dual-band shared-aperture two- dimensional phased array antenna with wide bandwidth of 25.0% and 11.4% at Ku- and Ka-band," IEEE Transactions on Antennas and Propagation, Vol. 70, No. 9, 7468-7477, Sep. 2022.
doi:10.1109/TAP.2022.3161267 Google Scholar

18. Niu, W., B. Sun, G. Zhou, and Z. Lan, "Dual-band aperture shared antenna array with decreased radiation pattern distortion," IEEE Transactions on Antennas and Propagation, Vol. 70, No. 7, 6048-6053, Jul. 2022.
doi:10.1109/TCSI.2022.3173688 Google Scholar

19. Ou, J.-H., B. Xu, S. F. Bo, Y. Dong, S.-W. Dong, and J. Tang, "Highly-isolated RF power and information receiving system based on dual-band dual-circular-polarized shared-aperture antenna," IEEE Transactions on Circuits and Systems I: Regular Papers, Vol. 69, No. 8, 3093-3101, Aug. 2022.
doi:10.1109/TAP.2023.3234162 Google Scholar

20. Kim, B., M. Kim, D. Lee, J. Lee, Y. Youn, and W. Hong, "A shared-aperture cavity slot antenna-in- package concept featuring end-re and broadside radiation for enhanced beam coverage of mmwave mobile devices," IEEE Transactions on Antennas and Propagation, Vol. 71, No. 2, 1378-1390, Feb. 2023.
doi:10.1109/TAP.2023.3248445 Google Scholar

21. Ran, J., Y. Wu, C. Jin, P. Zhang, and W. Wang, "Dual-band multipolarized aperture-shared antenna array for Ku-/Ka-band satellite communication," IEEE Transactions on Antennas and Propagation, Vol. 71, No. 5, 3882-3893, May 2023.
doi:10.1109/TAP.2022.3222091 Google Scholar

22. Hao, R. S., J. F. Zhang, S. C. Jin, D. G. Liu, T. J. Li, and Y. J. Cheng, "K-/Ka-band shared-aperture phased array with wide bandwidth and wide beam coverage for LEO satellite communication," IEEE Transactions on Antennas and Propagation, Vol. 71, No. 1, 672-680, Jan. 2023.
doi:10.1109/ACCESS.2019.2911965 Google Scholar

23. Li, K., T. Dong, and Z. Xia, "A broadband shared-aperture L/S/X-band dual polarized antenna for SAR applications," IEEE Access, Vol. 7, 51417-51425, 2019.
doi:10.1109/TVT.2021.3072556 Google Scholar

24. Yang, G.-W. and S. Zhang, "A dual-band shared-aperture antenna with wide-angle scanning capability for mobile system applications," IEEE Trans. Veh. Technol., Vol. 70, No. 5, 4088-4097, May 2021.
doi:10.1002/mmce.22720 Google Scholar

25. Kothapudi, V. K. and V. Kumar, "A multi-layer S/X-band shared aperture antenna array for airborne synthetic aperture radar applications," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 31, No. 8, e22720, 2021.
doi:10.26866/jees.2019.19.1.64 Google Scholar

26. Kothapudi, V. K. and V. Kumar, "SFCFOS uniform and Chebyshev amplitude distribution linear array antenna for K-band applications," Journal of Electromagnetic Engineering and Science, Vol. 19, 64-70, Jan. 2019. Google Scholar

27. Kothapudi, V. K. and V. Kumar, "Hybrid-fed shared aperture antenna array for X/K-band airborne synthetic aperture radar applications," IET Microwaves, Antennas & Propagation, Vol. 15, Dec. 2020.
doi:10.1109/ACCESS.2018.2810233 Google Scholar

28. Kothapudi, V. K. and V. Kumar, "A 6-port two-dimensional 3x3 series-fed planar array antenna for dual-polarized X-band airborne synthetic aperture radar applications," IEEE Access, Vol. 6, 12001-12007, Mar. 2018.
doi:10.26866/jees.2018.18.2.117 Google Scholar

29. Kothapudi, V. K. and V. Kumar, "Compact 1x2 and 2x2 dual polarized series-fed antenna array for X-band airborne synthetic aperture radar applications," Journal of Electromagnetic Engineering and Science, Vol. 18, 117-128, Apr. 2018.
doi:10.1109/TAP.2019.2908108 Google Scholar

30. Chopra, R. and G. Kumar, "Series-fed binomial microstrip arrays for extremely low sidelobe level," IEEE Transactions on Antennas and Propagation, Vol. 67, No. 6, 164275-164279, 2019. Google Scholar

31. Mishra, N. K. and S. Das, "Investigation of binomial and Chebyshev distributionon dielectric resonator antenna array," Processing, and Computing Technologies, 434-437, 2014. Google Scholar

32. Mathur, P., G. Kumar, P. K. Mishra, and Y. K. Verma, "Large gain linear series-fed microstrip antenna arrays at Ka and C bands," 2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 1872-1873, Vancouver, BC, Canada, 2015.
doi:10.1109/TAP.2019.2922774 Google Scholar

33. Chopra, R. and G. Kumar, "Series- and corner-fed planar microstrip antenna arrays," IEEE Transactions on Antennas and Propagation, Vol. 67, No. 9, 5982-5990, 2019.
doi:10.1109/R10-HTC.2017.8288905 Google Scholar

34. Baki, K. M., "Beamwidth reduction of the binomial array for 5G communications," 2017 IEEE Region 10 Humanitarian Technology Conference (R10-HTC), 55-58, 2017. Google Scholar

35. Apostolov, P., B. Yurukov, and A. Stefanov, "Efficient three-element binomial array antenna," 2019 PhotonIcs & Electromagnetics Research Symposium --- Spring (PIERS --- Spring), 4127-4131, Rome, Italy, 2019. Google Scholar

36. Chopra, R., G. Kumar, and R. Lakhani, "Corner fed microstrip antenna array with reduced cross-polarization and sidelobe level," 2016 Asia-Pacic Microwave Conference (APMC), 1-4, 2016. Google Scholar

37., Computer simulation technology version (2018), Wellesley Hill MA. Available at: www.cst.com.

38., Rogers Corporation, available at: www.rogerscorp.com.

Mrs. Praveena Kati

Dr. Venkata Kishore Kothapudi