PIER C
 
Progress In Electromagnetics Research C
ISSN: 1937-8718
Home | Search | Notification | Authors | Submission | PIERS Home | EM Academy
Home > Vol. 76 > pp. 207-219

A SINGLE LAYER S/X-BAND SERIES-FED SHARED APERTURE ANTENNA FOR SAR APPLICATIONS

By V. K. Kothapudi and V. Kumar

Full Article PDF (3,357 KB)

Abstract:
This paper presents our research work on designing a dual-band dual-polarized (DBDP) series-fed S/X-band shared aperture antenna (SAA) for synthetic aperture radar (SAR) applications. The proposed SAA DBDP X-band antenna is designed with the concept of series-fed 4-group 2x2 planar arrays with high impedance microstrip line feeding in both vertical and horizontal polarizations. By etching out the inner edge elements from 2x2 X-band subarrays in all the four-groups, the S-band element could be accommodated. The design evolution stages have been presented. The S-band (3.2GHz) is best suited for volumetric soil moisture estimation using SAR and X-band (9.3 GHz) best suited for surveillance SAR applications and grain size estimation. To verify the antenna design concept, a prototype is fabricated and measured with both S-parameters and radiation characteristics including gain measurements. The antenna with reflection coefficient lS11l < -10 dB has an impedance bandwidth 3.12-3.42 GHz (9.3% BW) in S-band and 9.2-9.36 GHz (1.72% BW) in X-band. The measured isolation lS21l between two different bands in the same polarization is better than 25 dB, and the isolation between two different bands in two orthogonal ports is better than 30 dB. Measured gain of the antenna at S-band is better than 8.5 dBi at V-port and H-port, and X-band is better than 11 dBi at either port. Measured side-lobe level (SLL) at S-band is better than -17 dB at either port, and X-band is better than -20 dB at either port. The overall size of the S/X-DBDP SAA is 100 x 100 x 1.6 mm³. Measured results of the S/X-DBDP SAA show good agreement with the finite integration technique (FIT) based computer simulation technology (CST) microwave studio.

Citation:
V. K. Kothapudi and V. Kumar, "A Single Layer S/X-Band Series-Fed Shared Aperture Antenna for SAR Applications," Progress In Electromagnetics Research C, Vol. 76, 207-219, 2017.
doi:10.2528/PIERC17070104

References:
1. 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, 829-839, 1995.
doi:10.1109/36.406669

2. Pokuls, R., J. Uher, and D. M. Pozar, "Dual-frequency and dual-polarization microstrip antennas for SAR applications," IEEE Trans. Antennas Propag., Vol. 46, 1289-1296, 1998.
doi:10.1109/8.719972

3. Pozar, D. M. and S. D. Targonski, "A shared-aperture dual-band dual polarized microstrip array," IEEE Trans. Antennas Propag., Vol. 49, 150-157, 2001.
doi:10.1109/8.914255

4. Karmakar, N. C., Md. N. Mollah, S. K. Padhi, and J. S. Fu, "PBG-assisted shared-aperture dualband aperture-coupled patch antenna for satellite communication," Microw. Opt. Technol. Lett., Vol. 16, 289-292, 2005.
doi:10.1002/mop.20968

5. Coman, C. I., I. E. Lager, and L. P. Ligthart, "The design of shared aperture antenna consisting of differently sized elements," IEEE Trans. Antennas Propag., Vol. 54, 376-383, 2006.
doi:10.1109/TAP.2005.863382

6. 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 Trans. Antennas Propag., Vol. 60, 4157-4165, 2012.
doi:10.1109/TAP.2012.2207034

7. Kong, L.-B., S.-S. Zhong, and Z. Sun, "Broadband microstrip element design of a DBDP sharedaperture SAR array," Microw. Opt. Technol. Lett., Vol. 54, 133-136, 2012.
doi:10.1002/mop.26464

8. Zhou, S. G., T. H. Chio, and J. Lu, "A shared-aperture dual-wideband dual-polarized stacked microstrip array," Microw. Opt. Technol. Lett., Vol. 54, 486-491, 2012.
doi:10.1002/mop.26579

9. Sharma, D. K., S. Kulshrestha, S. B. Chakrabarty, and R. Jyoti, "Shared aperture dual band dual polarization microstrip patch antenna," Microw. Opt. Technol. Lett., Vol. 55, 917-922, 2013.
doi:10.1002/mop.27414

10. Zhou, S. G., P. K. Tan, and T. H. Chio, "A wideband, low profile P and Ku-band shared aperture antenna with high isolation and low cross-polarization," IET Microwaves Antennas Propag., Vol. 7, 223-229, 2013.
doi:10.1049/iet-map.2012.0550

11. Sun, Z., K. P. Esselle, S.-S. Zhong, and Y. J. Guo, "Shared-aperture dual-band dual-polarization array using sandwiched stacked patch," Progress In Electromagnetics Research C, Vol. 52, 183-195, 2014.
doi:10.2528/PIERC14052106

12. Zhou, S.-G., J.-J. Yang, and T.-H. Chio, "Design of L/X-band shared aperture antenna array for SAR application," Microw. Opt. Technol. Lett., Vol. 57, 2197-2204, 2015.
doi:10.1364/OL.40.002197

13. Chakrabarti, S., "Development of shared aperture dual configuration antenna for S/Ka-band communication," Microw. Opt. Technol. Lett., Vol. 58, 139-145, 2015.
doi:10.1002/mop.29515

14. Qin, F., S. Gao, Q. Luo, C.-X. Mao, C. Gu, G.Wei, J. Xu, J. Li, C.Wu, K. Zheng, and S. Zheng, "A simple low-cost shared-aperture dual-band dual-polarized high-gain antenna for synthetic aperture radars," IEEE Trans. Antennas Propag., Vol. 64, 2914-2922, 2016.
doi:10.1109/TAP.2016.2559526

15. Kumar, S. S., H. C. Sanandiya, R. Jyoti, A. K. Singhal, D. K. Jangid, and R. C. Gupta, "A shared aperture helical-array antenna set at L and S bands for navigation satellite systems," IEEE Antennas Propag. Mag., Vol. 42, 144-151, 2017.

16. James, J. and P. Hall, Handbook of Microstrip Antennas, Ser. IEEE Electromagnetic Waves Series, Peter Peregrinus Ltd., London, United Kingdom, 1989.

17. Pozar, D. and D. Schaubert, "Comparison of three series fed microstrip array geometries," Proc. IEEE Antennas Propag. Soc. Int. Symp., 728-731, IEEE, 2002.

18., , Rogers Corporation, Available at: www.rogerscorp.com.

19., , Computer simulation technology version (2016), Wellesley Hills, MA. Available at: www.cst.com.

20. Rocca, P. and A. F. Morabito, "Optimal synthesis of reconfigurable planar arrays with simplified architectures for monopulse radar applications," IEEE Trans. Antennas Propag., Vol. 63, 1048-1058, 2015.
doi:10.1109/TAP.2014.2386359


© Copyright 2010 EMW Publishing. All Rights Reserved