volume | PIER Journals

Abstract

In this work, a quad-band omnidirectional slot antenna array is proposed. The structure consists of two closely-spaced radiating elements fed using coplanar waveguide (CPW) line. This combined structure is then integrated in a tapered slot etched on the antenna to enable operation in four frequency bands (0.8, 1.8, 2.6 and 3.45 GHz) for LTE and WiMAX applications with at least -10 dB of reflection coefficient. The antenna dimensional parameters are also studied to understand its behaviour and eects on its performance in facilitating the optimization process. Measurements of the fabricated antenna on a low-cost FR4 substrate validate its operation centred at 0.845 (from 0.77 to 0.92 GHz), 1.74 (from 1.59 to 1.9 GHz), 2.655 (2.59 to 2.72 GHz) and 3.49 GHz (from 3.28 to 3.7 GHz). Meanwhile, simulated and measured radiation patterns of the proposed antenna in all bands agree well and are omnidirectional, making is suitable for application in mobile terminals.

1. Holma, H., A. Toskala, K. Ranta-Aho, and J. Pirskanen, "High-speed packet access evolution in 3 gpp release 7 [topics in radio communications]," IEEE Communications Magazine, Vol. 45, No. 12, 29-35, 2007.
doi:10.1109/MCOM.2007.4395362 Google Scholar

2. Mun, B., F. J. Harackiewicz, B. Kim, H. Wi, J. Lee, M. J. Park, and B. Lee, "New configuration of handset MIMO antenna for LTE 700 band applications," International Journal of Antennas and Propagation, 2013. Google Scholar

3. Schaubert, D. H., "A review of some microstrip antenna characteristics," Microstrip Antennas, 59-67, 1995. Google Scholar

4. Soliman, E. A., S. Brebels, G. Vandenbosch, and E. Beyne, "X-band brick wall antenna fed by CPW," Electronics Letters, Vol. 34, No. 9, 836-838, 1998.
doi:10.1049/el:19980628 Google Scholar

5. Miao, M., B. L. Ooi, and P. S. Kooi, "Broadband CPW-fed wide slot antenna," Microwave and Optical Technology Letters, Vol. 25, No. 3, 206-211, 2000.
doi:10.1002/(SICI)1098-2760(20000505)25:3<206::AID-MOP14>3.0.CO;2-E Google Scholar

6. Liu, H. C., T. S. Horng, and N. G. Alexopoulos, "Radiation of printed antennas with a coplanar waveguide feed," IEEE Transactions on Antennas and Propagation, Vol. 43, No. 10, 1143-1148, 1995.
doi:10.1109/8.467652 Google Scholar

7. Sayem, A. and M. Ali, "Characteristics of a microstrip-fed miniature printed Hilbert slot antenna," Progress In Electromagnetics Research, Vol. 56, 1-18, 2006.
doi:10.2528/PIER05041801 Google Scholar

8. Eldek, A. A., A. Z. Elsherbeni, and C. E. Smith, "Dual-wideband square slot antenna with a U-shaped printed tuning stub for personal wireless communication systems," Progress In Electromagnetics Research, Vol. 53, 319-333, 2005.
doi:10.2528/PIER04103001 Google Scholar

9. Sadat, S. and S. D. S. Javan, "Design of a microstrip square-ring slot antenna filled by an H-shape slot for UWB applications," 2007 IEEE Antennas and Propagation Society International Symposium, 705-708, IEEE, 2007.
doi:10.1109/APS.2007.4395591 Google Scholar

10. Huang, J. F., "A simple model of designing CPW-fed slot antenna," 2nd International Conference on Microwave and Millimeter Wave Technology, ICMMT, 383-386, IEEE, 2000.
doi:10.1109/ICMMT.2000.895701 Google Scholar

11. Bhobe, A. U., C. L. Holloway, M. Piket-May, and R. Hall, "Coplanar waveguide fed wideband slot antenna," Electronics Letters, Vol. 36, No. 16, 1340-1342, 2000.
doi:10.1049/el:20000984 Google Scholar

12. Waterhouse, R. B. and D. Novak, "Small folded CPW fed slot antennas," 2006 IEEE Antennas and Propagation Society International Symposium, 2599-2602, IEEE, 2006.
doi:10.1109/APS.2006.1711132 Google Scholar

13. Saed, M. A., "Reconfigurable broadband microstrip antenna fed by a coplanar waveguide," Progress In Electromagnetics Research, Vol. 55, 227-239, 2005.
doi:10.2528/PIER05031601 Google Scholar

14. Kumar, A., "A compact H-shaped slot triple-band microstrip antenna for WLAN and WiMAX applications," 2016 IEEE Annual India Conference (INDICON), 1-4, IEEE, 2016. Google Scholar

15. Avila, D. R., S. P. Garc´ıa, Y. P.Marrero, A. S. de Vera, F.M. Rizo, J. V. L. Sanz, and A. T. Puente, "Multiband CPW-fed slot antennas," 10th European Conference on Antennas and Propagation (EuCAP), 1-4, IEEE, 2016. Google Scholar

16. Joseph, S., B. Paul, S. Mridula, and P. Mohanan, "CPW-fed compact multiband antennas using circular monopole with hexagonal slot," Fifth International Conference on Advances in Computing and Communications (ICACC), 287-290, IEEE, 2015.
doi:10.1109/ICACC.2015.87 Google Scholar

17. Wang, Y., Q. Y. Zhang, and Q. X. Chu, "Triple-band monopole antenna with dual-sleeves inside the ground plane," Asia Pacific Microwave Conference, APMC 2009, 1980-1983, IEEE, 2009.
doi:10.1109/APMC.2009.5385281 Google Scholar

18. Cai, L. Y., G. Zeng, and H. C. Yang, "Compact triple band antenna for Bluetooth/WiMAX/WLAN applications," International Symposium on Signals Systems and Electronics (ISSSE), Vol. 2, 1-4, IEEE, 2010. Google Scholar

19. Bhaskar, S., R. S. Brar, and A. K. Singh, "Compact planar rectangular monopole antenna for Bluetooth and UWB applications," International Conference on Electrical, Computer and Electronics Engineering (UPCON), 2016 IEEE Uttar Pradesh Section, 138-141, IEEE, 2016.
doi:10.1109/UPCON.2016.7894640 Google Scholar

20. Lin, T., L. Song, S. Liu, Y. Wang, and Z. Li, "Novel conformal Vivaldi antenna fed by CPW," 2016 IEEE International Conference on Microwave and Millimeter Wave Technology (ICMMT), Vol. 2, 725-727, IEEE, 2016.
doi:10.1109/ICMMT.2016.7762422 Google Scholar

21. Wang, J. and Y. Yang, "A compact four bands microstrip patch antenna with coplanar waveguide feed," 3rd Asia-Pacific Conference on Antennas and Propagation (APCAP), 33-36, IEEE, Vancouver, 2014. Google Scholar

22. Li, H., Y. Zhou, X. Mou, Z. Ji, H. Yu, and L. Wang, "Miniature four-band CPW-fed antenna for RFID/WiMAX/WLAN applications," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 1684-1688, 2014.
doi:10.1109/LAWP.2014.2345564 Google Scholar

23. Soler, J., F. J. Gonzalez, C. Puente, and J. Anguera, "Advances in loading techniques to design multifrequency monopole antennas," Microwave and Optical Technology Letters, Vol. 41, No. 6, 434-437, 2004.
doi:10.1002/mop.20162 Google Scholar

24. Verma, S. and P. Kumar, "Compact triple-band antenna for WiMAX and WLAN applications," Electronics Letters, Vol. 50, No. 7, 484-486, 2014.
doi:10.1049/el.2013.4313 Google Scholar

25. Wang, C. J. and K. L. Hsiao, "CPW-fed monopole antenna for multiple system integration," IEEE Transactions on Antennas and Propagation, Vol. 62, No. 2, 1007-1011, 2014.
doi:10.1109/TAP.2013.2290551 Google Scholar

26. Zahraoui, I., J. Zbitou, A. Errkik, E. Abdelmounim, A. Tajmouati, and M. Latrach, "Novel low cost compact printed antenna CPW-fed for GSM, GPS and PCS applications," Third International Workshop on RFID and Adaptive Wireless Sensor Networks (RAWSN), 48-51, IEEE, 2015.
doi:10.1109/RAWSN.2015.7173278 Google Scholar

27. Singsura, P., P. Chomtong, S. Meesomklin, and P. Akkaraekthalin, "A multiband monopole antenna with double square slots and capacitive CPW feed for LTE, WiMAX and WLAN systems," 12th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 1-5, IEEE, 2015. Google Scholar

28. Chomtong, P. and P. Akkaraekthalin, "A multiband slot CPW antenna using capacitive feed and interdigital capacitor for GSM, WiMAX and WLAN systems," Asia-Pacific Conference on Communications (APCC), 446-449, IEEE, 2014.
doi:10.1109/APCC.2014.7092854 Google Scholar

29. Wadell, B. C., Transmission Line Design Handbook, Artech House, 1991.

Dr. Manzoor Elahi

Dr. Rizwan Khan

Professor Azremi Abdullah Al-Hadi

Dr. Saeeda Usman

Dr. Ping Jack Soh

Dr. Habibullah Khan