volume | PIER Journals

Abstract

A novel null steering method in a multi-mode circular microstrip patch antenna is presented in this letter. A stacked patch configuration, capable of exciting three different radiating modes, namely TM₁₁, TM₂₁, and TM₃₁, is investigated. When two or three modes are excited simultaneously, up to three nulls can be formed in the upper hemisphere, and by tuning the amplitude ratio of these modes, a continuous null steering pattern is realized. It is shown that a full hemispherical null steering of ±90° range can be achieved using the proposed method. The null steering capability with different dielectric permittivities is also presented.

1. Mohammed, J. R., "Element selection for optimized multi wide nulls in almost uniformly excited arrays," IEEE Antennas Wireless Propag. Lett., Vol. 17, No. 4, 629-632, Apr. 2018.
doi:10.1109/LAWP.2018.2807371 Google Scholar

2. Guney, K. and A. Akdagli, "Null steering of linear antenna arrays using a modified tabu search algorithm," Progress In Electromagnetics Research, Vol. 33, 167-182, 2001.
doi:10.2528/PIER00121402 Google Scholar

3. Mouhamadou, M., P. Vaudon, and M. Rammal, "Smart antenna array patterns synthesis: Null steering and multi-user beamforming by phase control," Progress In Electromagnetics Research, Vol. 60, 95-106, 2006.
doi:10.2528/PIER05112801 Google Scholar

4. Grewal, N. S., M. Rattan, and M. S. Patterh, "A linear antenna array failure correction with null steering using firefly algorithm," Def. Sci. J., Vol. 64, No. 2, 136-142, Mar. 2014.
doi:10.14429/dsj.64.4250 Google Scholar

5. Mohammed, J. R., "Optimal null steering method in uniformly excited equally spaced linear arrays by optimising two edge elements," Electron. Lett., Vol. 53, No. 13, 835-837, 2017.
doi:10.1049/el.2017.1405 Google Scholar

6. Mohammed, J. R. and K. H. Sayidmarie, "Null steering method by controlling two elements," Antennas Propag. IET Microw., Vol. 8, No. 15, 1348-1355, 2014.
doi:10.1049/iet-map.2014.0213 Google Scholar

7. Chatterjee, S., S. Chatterjee, and A. Majumdar, "Edge element controlled null steering in beam-steered planar array," IEEE Antennas Wireless Propag. Lett., Vol. 16, 2521-2524, 2017.
doi:10.1109/LAWP.2017.2728813 Google Scholar

8. Parihar, M. S., A. Basu, and S. K. Koul, "Dfficient spurious rejection and null steering using slot antennas," IEEE Antennas Wireless Propag. Lett., Vol. 10, 207-210, 2011.
doi:10.1109/LAWP.2011.2127437 Google Scholar

9. Yong, S. and J. T. Bernhard, "Reconfigurable null scanning antenna with three dimensional null steer," IEEE Trans. Antennas Propag., Vol. 61, No. 3, 1063-1070, Mar. 2013.
doi:10.1109/TAP.2012.2227101 Google Scholar

10. Yong, S. and J. T. Bernhard, "A pattern reconfigurable null scanning antenna," IEEE Trans. Antennas Propag., Vol. 60, No. 10, 4538-4544, Oct. 2012.
doi:10.1109/TAP.2012.2207336 Google Scholar

11. Kunysz, W., M. Okoniewski, and R. H. Johnston, "Null forming in circularly polarized antenna patterns using reactive loading of multi-arm archimedean spiral antenna," IEEE Trans. Antennas Propag., Vol. 62, No. 11, 5547-5556, Nov. 2014.
doi:10.1109/TAP.2014.2354674 Google Scholar

12. Dicandia, F. A., S. Genovesi, and A. Monorchio, "Null-steering antenna design using phase-shifted characteristic modes," IEEE Trans. Antennas Propag., Vol. 64, No. 7, 2698-2706, Jul. 2016.
doi:10.1109/TAP.2016.2556700 Google Scholar

13. Li, Y., Z. Zhang, C. Deng, and Z. Feng, "A simplified hemispherical 2-D angular space null steering approach for linearly polarization," IEEE Antennas Wireless Propag. Lett., Vol. 13, 1628-1631, 2014.
doi:10.1109/LAWP.2014.2347340 Google Scholar

14. Deng, C., Y. Li, Z. Zhang, and Z. Feng, "A hemispherical 3-D null steering antenna for circular polarization," IEEE Antennas Wireless Propag. Lett., Vol. 14, 803-806, 2015.
doi:10.1109/LAWP.2014.2382107 Google Scholar

15. Zhang, Z., S. Xiao, and C. Liu, "A multiple concentric circularly polarized patch antenna for beam-scanning," 2016 IEEE Int. Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM), 1-3, 2016. Google Scholar

16. Babakhani, B. and S. K. Sharma, "Dual null steering and limited beam peak steering using triple-mode circular microstrip patch antenna," IEEE Trans. Antennas Propag., Vol. 65, No. 8, 3838-384, Aug. 2017.
doi:10.1109/TAP.2017.2710198 Google Scholar

17. Garg, R., P. Bhartia, I. J. Bahl, and A. Ittipiboon, Microstrip Antenna Design Handbook, Artech House, 2001.

18. Kishk, A. A. and L. Shafai, "The effect of various parameters of circular microstrip antennas on their radiation efficiency and the mode excitation," IEEE Trans. Antennas Propag., Vol. 34, No. 8, 969-976, Aug. 1986.
doi:10.1109/TAP.1986.1143939 Google Scholar

Dr. Zabed Iqbal

Professor Maria Pour