volume | PIER Journals

Abstract

This paper presents an electrical model of aperture and mutually coupled three-elements cylindrical dielectric resonator antenna (CDRA) array designed for 802.11a system applications. In electrical model, each antenna component is represented by its equivalent RLC circuit. The advanced design system (ADS) software is used to build the electrical model and predict the behavior of return loss, while the antenna structure is simulated using CST microwave studio before fabrication. The first and last radiating elements of the proposed array are excited through the aperture slots while the middle element is excited through the mutual coupling of its neighboring elements. The slot length and inter-slot distance effects on bandwidth are comprehensively analyzed and presented. The maximum gain of the proposed array for 5.0 GHz band is about 10.8 dBi, and the achieved simulated (CST, ADS) and measured impedance bandwidths are 1.076 GHz, 1.0 GHz, and 1.2 GHz respectively. The proposed CDRA array antenna exhibits an enhancement of the gain (7.4%) and bandwidth (93.3%) as compared to a literature work with aperture slots. In this study, it is also observed that by using the mutual coupling instead of third slot to excite the middle CDRA, side lobe levels are also reduced significantly over the entire 5.0 GHz band.

1. Long, S., et al. "The resonant cylindrical dielectric cavity antenna," IEEE Transactions on Antennas and Propagation, Vol. 31, 406-412, 1983.
doi:10.1109/TAP.1983.1143080 Google Scholar

2. Ain, M. F., S. I. S. Hassan, J. S. Mandeep, M. A. Othman, B. M. Nawang, S. Sreekantan, S. D. Hutagalung, and Z. A. Ahmad, "2.5 GHz Batio3 dielectric resonator antenna," Progress In Electromagnetics Research, Vol. 76, 201-210, 2007.
doi:10.2528/PIER07071102 Google Scholar

3. Dashti, H., M. H. Neshati, and F. Mohanna, "RDRA array fed by dielectric image line with improved gain & low back radiation," 1st Internationala Conference on Communication Engineering, Journal of Mathematics, 2010. Google Scholar

4. Kumari, R., et al. "A dual band triangular shaped DRA array for WLAN/WiMAX applications," 2011 Annual IEEE India Conference (INDICON), 1-4, 2011. Google Scholar

5. Yau, D. and M. V. Shuley, "Numerical analysis of an aperture coupled rectangular dielectric resonator antenna using a surface formulation and the method of moments," IEE Proceedings --- Microwaves, Antennas and Propagation, Vol. 146, 105-110, 1999.
doi:10.1049/ip-map:19990209 Google Scholar

6. Sreekantan, S., Y. K. Ling, Z. A. Ahmad, M. F. Ain, M. A. Othman, and S. I. S. Hassan, "Simulation and experimental investigators on rectangular, circular and cylindrical dielectric resonator antenna," Progress In Electromagnetics Research C , Vol. 7, 151-166, 2009.
doi:10.2528/PIERC09021802 Google Scholar

7. Ain, M. F., Y. M. A. Qasaymeh, Z. A. Ahmad, M. A. Zakariya, M. A. Othman, S. S. Olokede, and M. Z. Abdullah, "Novel modeling and design of circularly polarized dielectric resonator antenna array," Progress In Electrimagnetics Research C, Vol. 28, 165-179, 2012.
doi:10.2528/PIERC12021801 Google Scholar

8. Baba, A. A., M. A. Zakariya, and Z. Baharudin, "Wideband and high gain cylindrical dielectric resonator antenna array," Proceedings of the 7th International Conference on Ubiquitous Information Management and Communication --- ICUIMC 13 , Malaysia 2013. Google Scholar

9. Baba, A. A., M. A. B. Zakariya, Z. Baharudin, M. H. M. Khir, M. Z. u. Rehman, Z. A. Ahmad, and Y. M. A. Qasaymeh, "Aperture and mutual coupled cylindrical dielectric resonator antenna array," Progress In Electromagnetics Research C, Vol. 37, 223-233, 2013. Google Scholar

10. Ahmed, O. M. H. and A.-R. Sebak, "Mutual coupling effect on ultrawideband linear antenna array performance," International Journal of Antenna and Propogation, Vol. 2011, 11, 2011. Google Scholar

11. Petosa, A., Dielectric Resonator Antennas Handbook, 2007.

12. Ladani, F. T. and A. Z. Nejzhad, "Modeling of conical dielectric resonator by simulation at 10 GHz and comparing with the cylindrical dielectric resonator," International Symposium on Telecommunication, 125-128, 2008. Google Scholar

13. Akhavan, H. G. and D. Mirshekar-Syahkal, "Approximate model for microstrip fed slot antennas," Electronics Letters, Vol. 30, 1902-1903, 1994.
doi:10.1049/el:19941300 Google Scholar

14. Ferchichi, A., N. Fadlallah, and A. Gharssallah, "A novel electrical model to an antenna array," Journal of Engineering and Technology Research, Vol. 3, No. 12, 321-329, Nov. 2011.
doi:10.5897/JETR11.013 Google Scholar

15. Verma, A. K. and Nasimuddin, "Analysis of circular microstrip antenna on thick substrate," Jounal of Mcrowaves and Optoelectronics, Vol. 2, No. 5, 30-38, 2002. Google Scholar

16. Ain, M. F., Y. M. A. Qasaymeh, Z. A. Ahmad, M. A. Zakariya, M. A. Othman, A. A. Sulaiman, A. Othman, S. D. Hutagalung, and M. Z. Abdullah, "A novel 5.8 GHz high gain array dielectric resonator antenna," Progress In Electromagnetics Research C, Vol. 15, 201-210, 2010.
doi:10.2528/PIERC10053104 Google Scholar

Mr. Affan Aziz Baba

Dr. Mohd Azman Zakariya

Dr. Zuhairi Baharudin

Dr. Muhd. Zaka ur Rehman

Dr. Mohd Fadzil Ain

Dr. Zainal Arrifin Ahmad