volume | PIER Journals

Abstract

Wideband designs of nearly square microstrip antenna using two half U-slots and rectangular slots are proposed. The slots optimize the spacing in between the patch modified TM11, TM20, TM02, and TM30 resonant modes, to yield wideband response. The design with two half U-slots yields bandwidth of around 1000 MHz (~50%) whereas that with an additional rectangular slot yields bandwidth of 1345 MHz (~61%). Due to the presence of higher order modes, the proposed design offers higher cross polar radiation pattern across the entire bandwidth with the gain greater than 5 dBi. The formulations for the modified patch modes and subsequent redesign procedure are presented, which serve as a guideline in the designing of similar antennas around specific resonance frequency. With the given antenna characteristics, the proposed antennas will find applications in personal and mobile communication systems.

1. Huynh, T. and K. F. Lee, "Single-layer single-patch wideband microstrip antenna," Electronics Letters, Vol. 31, No. 16, 1310-1312, 1995.
doi:10.1049/el:19950950

2. Wong, K. L. and W. H. Hsu, "A broadband rectangular patch antenna with a pair of wide slits," IEEE Transactions on Antennas & Propagation, Vol. 49, No. 9, 1345-1347, 2001.
doi:10.1109/8.951507

3. Wong, K. L., Compact and Broadband Microstrip Antennas, 1st Ed., John Wiley & Sons, Inc., 2002.
doi:10.1002/0471221112

4. Tiwari, R. N. P. Singh and B. K. Kanaujia, "Butter fly shape compact microstrip antenna for wideband applications," Progress In Electromagnetics Research, Vol. 69, 45-50, 2017.
doi:10.2528/PIERL17042703

5. Sharma, S. K. and L. Shafai, "Performance of a novel Ψ-shaped microstrip patch antenna with wide bandwidth," IEEE Antennas Wireless Propagation Letters, Vol. 8, 468-471, 2009.
doi:10.1109/LAWP.2009.2020184

6. Islam, M. T., M. N. Shakib, and N. Misran, "Multi-slotted microstrip patch antenna for wireless communication," Progress In Electromagnetic Research Letters, Vol. 10, 11-18, 2009.
doi:10.2528/PIERL09060704

7. Chen, Y., S. Yang, and Z. Nie, "Bandwidth enhancement method for low profile e-shaped microstrip patch antennas," IEEE Transactions on Antennas & Propagation, Vol. 58, No. 7, 2442-2447, 2010.
doi:10.1109/TAP.2010.2048850

8. Bhardwaj, S. and Y. R. Samii, "A comparative Study of C-shaped, E-shaped, and U-slotted patch antennas," Microwave and Optical Technology Letters, Vol. 54, No. 7, 1746-1756, 2012.
doi:10.1002/mop.26894

9. Deshmukh, A. A., D. Singh, and K. P. Ray, "Modified designs of broadband e-shape microstrip antennas," Sadhana — Academy Proceedings in Engineering Science, 44-64, Springer Publication, 2019.

10. Khodaei, G. F., J. Nourinia, and C. Ghobadi, "A practical miniaturized U-slot patch antenna with enhanced bandwidth," Progress In Electromagnetic Research B, Vol. 3, 47-62, 2008.
doi:10.2528/PIERB07112201

11. Radavaram, S. and M. Pour, "Wideband radiation reconfigurable microstrip patch antenna loaded with two inverted U-slots," IEEE Transactions on Antennas & Propagation, Vol. 67, No. 3, 1501-1508, 2019.
doi:10.1109/TAP.2018.2885433

12. Deshmukh, A. A. and K. P. Ray, "Analysis of broadband variations of U-slot cut rectangular microstrip antennas," IEEE Antennas and Propagation Magazine, Vol. 57, No. 2, 181-193, 2015.
doi:10.1109/MAP.2015.2414533

13. Deshmukh, A. A. and K. P. Ray, "Analysis of broadband Ψ-shaped microstrip antennas," IEEE Antennas Propagation Magazine, Vol. 55, No. 2, 107-123, 2013.
doi:10.1109/MAP.2013.6529321

14. Guo, Y. X., K. M. Luk, K. F. Lee, and Y. L. Chow, "Double U-slot rectangular patch antenna," Electronics Letters, Vol. 34, No. 19, 1805-1806, 1998.
doi:10.1049/el:19981283

15. Qin, P.-Y., Y. J. Guo, A. R. Weily, and C.-H. Liang, "A pattern reconfigurable U-slot antenna and its applications in MIMO systems," IEEE Transactions on Antennas & Propagation, Vol. 60, No. 2, 516-528, 2012.
doi:10.1109/TAP.2011.2173439

16. Qin, P.-Y., A. R. Weily, Y. J. Guo, and C.-H. Liang, "Polarization reconfigurable U-slot patch antenna," IEEE Transactions on Antennas & Propagation, Vol. 58, No. 10, 3383-3388, 2010.
doi:10.1109/TAP.2010.2055808

17. Yin, J., Q. Wu, C. Yu, H. Wang, and W. Hong, "Broadband symmetrical E-shape patch antenna with mode resonance for 5G millimeter wave applications," IEEE Transactions on Antennas & Propagation, Vol. 67, No. 7, 4474-4483, 2019.
doi:10.1109/TAP.2019.2911266

18. Xiao, S., Z. Shao, B.-Z. Wang, M.-T. Zhou, and M. Fujise, "Design of low profile microstrip antenna with enhanced bandwidth and reduced size," IEEE Transactions on Antennas & Propagation, Vol. 54, No. 5, 1594-1599, 2006.
doi:10.1109/TAP.2006.874362

19. Ge, Y., K. P. Esselle, and T. S. Bird, "A compact E-shaped patch antenna with corrugated wings," IEEE Transaction on Antennas & Propagation, Vol. 54, No. 8, 2411-2413, 2006.
doi:10.1109/TAP.2006.877204

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Professor Venkata A. P. Chavali

Professor Amit A. Deshmukh