volume | PIER Journals

Abstract

A magneto-electric dipole antenna with high front to back ratio (FBR) for femtocell base station is proposed. By using circular defects in the ground plane, the back radiation of the antenna is reduced. The prototype antenna achieves high FBR without affecting the bandwidth and gain. At S₁₁ = -10 dB, the simulated and measured impedance bandwidths of the proposed antenna are 58.06% (1.54-2.8 GHz) and 60.9% (1.55-2.91 GHz), respectively. The measured FBR value ranges from 21 to 29 dB. Stable unidirectional radiation pattern at both planes and average gain of 7 dBi are also obtained.

1. Luk, K. M. and H. Wong, "A new wideband unidirectional antenna element," Int. J. Microw. Opt. Technol., Vol. 1, No. 1, 35-44, 2006.

2. Luk, K. M. and B. Wu, "The magnetoelectric dipole — A wideband antenna for base stations in mobile communications," Proceedings of the IEEE, Vol. 100, No. 7, 2297-2307, 2012.
doi:10.1109/JPROC.2012.2193710

3. Govindanarayanan, I., N. Rangaswamy, and R. Anbazhagan, "Design and analysis of broadband magneto-electric dipole antenna for LTE femtocell base stations," J. Comput. Electron., Vol. 15, No. 1, 200-209, 2016.
doi:10.1007/s10825-015-0759-0

4. Zhai, H., J. Zhang, Y. Zang, Q. Gao, and C. Liang, "An LTE base-station magnetoelectric dipole antenna with anti-interference characteristics and its MIMO system application," IEEE Antennas Wireless Propag. Lett., Vol. 14, 906-909, 2015.
doi:10.1109/LAWP.2014.2384519

5. Yan, S., P. J. Soh, and G. A. E. Vandenbosch, "Wearable dual-band magneto-electric dipole antenna for WBAN/WLAN applications," IEEE Trans. Antennas Propag., Vol. 63, No. 9, 4165-4169, 2015.
doi:10.1109/TAP.2015.2443863

6. Ge, L. and K. M. Luk, "Band-reconfigurable unidirectional antenna: A simple, efficient magnetoelectric antenna for cognitive radio applications," IEEE Antennas Propag. Mag., Vol. 58, No. 2, 18-27, 2016.
doi:10.1109/MAP.2016.2520302

7. Gei, L. and K. M. Luk, "Linearly polarized and dual-polarized magneto-electric dipole antennas with reconfigurable beamwidth in the H-plane," IEEE Trans. Antennas Propag., Vol. 64, No. 2, 423-431, 2016.
doi:10.1109/TAP.2015.2505000

8. Xue, Q., S. W. Liao, and J. H. Xu, "A differentially-driven dual-polarized magneto-electric dipole antenna," IEEE Trans. Antennas Propag., Vol. 61, No. 1, 425-430, 2013.
doi:10.1109/TAP.2012.2214998

9. An, W. X., K. L. Lau, S. F. Li, and Q. Xue, "Wideband E-shaped dipole antenna with staircaseshaped feeding strip," Electron. Lett., Vol. 46, No. 24, 1583-1584, 2010.
doi:10.1049/el.2010.2890

10. Wu, B. W. and K. M. Luk, "A magneto-electric dipole with a modified ground plane," IEEE Antennas Wireless Propag. Lett., Vol. 8, 627-629, 2009.

11. Ge, L. and K. M. Luk, "A wideband magneto-electric dipole antenna," IEEE Trans. Antennas Propag., Vol. 60, No. 11, 4987-4991, 2012.
doi:10.1109/TAP.2012.2207689

12. Ge, L. and K. M. Luk, "A magneto-electric dipole for unidirectional UWB communications," IEEE Trans. Antennas Propag., Vol. 61, No. 11, 5762-5765, 2013.
doi:10.1109/TAP.2013.2276924

13. An, W. X., H. Wong, K. L. Lau, S. F. Li, and Q. Xue, "Design of broadband dual-band dipole for base station antenna," IEEE Trans. Antennas Propag., Vol. 60, No. 3, 1592-1595, 2012.
doi:10.1109/TAP.2011.2180336

14. Feng, B., W. An, S. Yin, L. Deng, and S. Li, "Dual-wideband complementary antenna with a duallayer cross-ME-dipole structure for 2G/3G/LTE/WLAN applications," IEEE Antennas Wireless Propag. Lett., Vol. 14, 626-629, 2015.
doi:10.1109/LAWP.2014.2375338

15. He, K., S. X. Gong, and F. Gao, "A wideband dual-band magneto-electric dipole antenna with improved feeding structure," IEEE Antennas Wireless Propag. Lett., Vol. 13, 1729-1732, 2014.
doi:10.1109/LAWP.2014.2353792

16. Ge, L. and K. M. Luk, "A low-profile magneto-electric dipole antenna," IEEE Trans. Antennas Propag., Vol. 60, No. 4, 1684-1689, 2012.
doi:10.1109/TAP.2012.2186260

17. Li, M. and K. M. Luk, "A low-profile wideband planar antenna," IEEE Trans. Antennas Propag., Vol. 61, No. 9, 4411-4418, 2013.
doi:10.1109/TAP.2013.2267715

18. Idayachandran, G. and R. Nakkeeran, "Compact magneto-electric dipole antenna for LTE femtocell base stations," Electron. Lett., Vol. 52, No. 8, 574-576, 2016.
doi:10.1049/el.2015.3266

19. Lai, H. W. and H. Wong, "Surface integrated magneto-electric dipole antenna for 5G Wi-Fi," IEEE Trans. Antennas Propag., Vol. 63, No. 2, 870-874, 2015.
doi:10.1109/TAP.2014.2384015

20. Llombart, N., A. Neto, G. Gerini, and P. De Maagt, "Planar circularly symmetric EBG structures for reducing surface waves in printed antennas," IEEE Trans. Antennas Propag., Vol. 53, No. 10, 3210-3218, 2015.
doi:10.1109/TAP.2005.856365

21. Rajo-Iglesias, E., L. Inclan-Sanchez, and O. Quevedo-Teruel, "Back radiation reduction in patch antennas using planar soft surfaces," Progress In Electromagnetics Research Letters, Vol. 6, 123-130, 2009.
doi:10.2528/PIERL08111202

22. Siu, L. and K. M. Luk, "Unidirectional antenna with loaded dielectric substrate," IEEE Antennas Wireless Propag. Lett., Vol. 7, 50-53, 2008.

23. Zhang, Z. Y., S. L. Zuo, and J. Y. Zhao, "Wideband folded bowtie antenna with Γ-shaped strip feed and tuning stubs," Microw. Opt. Technol. Lett., Vol. 55, No. 9, 2145-2149, 2013.
doi:10.1002/mop.27754

24. Ge, L. and K. M. Luk, "A magneto-electric dipole antenna with low-profile and simple structure," IEEE Antennas Wireless Propag. Lett., Vol. 10, 140-142, 2013.
doi:10.1109/LAWP.2013.2244054

25. Tang, C. and Q. Xue, "Vertical planar printed unidirectional antenna," IEEE Antennas Wireless Propag. Lett., Vol. 12, 368-371, 2013.
doi:10.1109/LAWP.2013.2252321

26. Jusoh, M., M. F. Jamlos, M. R. Kamarudin, T. Sabapathy, and M. I. Jais, "A compact high directional beam antenna for WiMAX and WiFi application," Microw. Opt. Technol. Lett., Vol. 55, No. 9, 2145-2149, 2013.
doi:10.1002/mop.27754

27. Sekhar Roy, J. and M. Thomas, "Investigations on a new proximity coupled dual-frequency microstrip antenna for wireless communication," Microw. Rev., Vol. 13, No. 1, 12-15, 2007.

28. Govindanarayanan, I. and N. Rangaswamy, "Asymmetric folded dipole antenna with high frontto- back ratio for LTE base stations," IEEE Antennas Wireless Propag. Lett., Vol. 15, 869-872, 2016.
doi:10.1109/LAWP.2015.2478197

Dr. Idayachandran Govindanarayanan

Dr. Nakkeeran Rangaswamy