volume | PIER Journals

Abstract

This study aims to develop and evaluate the multibeam one-third Radial Line Slot Array (RLSA) antennas. The various techniques used include: a) slot implementation on the background surface for the design of multibeam, b) cutting the full circle of RLSAs for the simplification of the antenna size, and c) slot deletion for the formation of bandwidth. Approximately 40 multibeam one-third RLSA models were designed and simulated, with the best being fabricated and measured to verify the simulation. The results showed that the antenna had symmetrical beams regarding the gain, direction, and beamwidth at 9 dBi, 20 and 160°, as well as 38°, respectively. The antenna also had a low reflection of -22 dB at the centre frequency of 5.8 GHz, with a broad bandwidth of approximately 1.2 GHz, which was highly sufficient for Wi-Fi application. The gain of 9 dBi was 3 dB lower than that of a simulated single-beam antenna, which was suitable for the theory of splitting. Based on these findings, the agreement between measurement and simulation verified the design of the antenna.

1. Ando, M., J. Takada, T. Numata, and N. Goto, "A linearly polarized radial line slot antenna," IEEE Trans. Antennas Propag., Vol. 36, No. 12, 1675-1680, 1988, doi: 10.1109/8.14389.
doi:10.1109/8.14389

2. Davis, P. W. and M. E. Bialkowski, "Experimental investigations into a linearly polarized radial slot antenna for DBS TV in Australia," IEEE Trans. Antennas Propag., Vol. 45, No. 7, 1123-1129, 1997, doi: 10.1109/8.596903.
doi:10.1109/8.596903

3. Koli, M. N. Y., M. U. Afzal, and K. P. Esselle, "Increasing the gain of beam-tilted circularly polarized radial-line slot array antennas," IEEE Trans. Antennas Propag., 1, 2022, doi: 10.1109/TAP.2022.3140490.

4. Bray, M., "A spiral radial line slot array antenna for NASA's double asteroid redirection test (DART)," 2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, 379-380, 2020, doi: 10.1109/IEEECONF35879.2020.9330400.
doi:10.1109/IEEECONF35879.2020.9330400

5. Imran, M. I., A. R. Tharek, and A. Hasnain, "An optimization of beam squinted radial line slot array antenna design at 5.8 GHz," 2008 IEEE International RF and Microwave Conference, 139-142, 2008, doi: 10.1109/RFM.2008.4897411.
doi:10.1109/RFM.2008.4897411

6. Bialkowski, K. S. and S. Zagriatski, "A dual band 2.4/5.2 GHz antenna including a radial line slot array and a patch," IEEE Antennas and Propagation Society Symposium, 2004, Vol. 3, 3095-3098, 2004, doi: 10.1109/APS.2004.1332033.
doi:10.1109/APS.2004.1332033

7. Takada, J., M. Ando, and N. Goto, "A reflection cancelling slot set in a linearly polarized radial line slot antenna," IEEE Trans. Antennas Propag., Vol. 40, No. 4, 433-438, 1992, doi: 10.1109/8.138845.
doi:10.1109/8.138845

8. Hirokawa, J., K. Sakurai, M. Ando, and N. Goto, "A matching slot pair for a circularly-polarized slotted waveguide array," International Symposium on Antennas and Propagation Society, Merging Technologies for the 90's, Vol. 2, 926-929, 1990, doi: 10.1109/APS.1990.115260.
doi:10.1109/APS.1990.115260

9. Akiyama, A., T. Yamamoto, M. Ando, and N. Goto, "Numerical optimisation of slot parameters for a concentric array radial line slot antenna," IEE Proc. Microwaves, Antennas Propag., Vol. 145, No. 3, 141-145, 1998, doi: 10.1049/ip-map:19981630.
doi:10.1049/ip-map:19981630

10. Islam, M. R. U., L. Faisal, and T. A. Rahman, "Simple integrated system for wireless backhaul networks," 2008 International Conference on Computer and Communication Engineering, 341-345, 2008, doi: 10.1109/ICCCE.2008.4580625.
doi:10.1109/ICCCE.2008.4580625

11. Purnamirza, T. and T. A. Rahman, "A novel technique in simplifying the fabrication process and improving the re ection coefficient of the linear polarized radial line slot array (LP-RLSA) antennas," Journal of Electromagnetic Waves and Applications, Vol. 26 , No. 4, 535-548, Jan. 2012, doi: 10.1163/156939312800030631.
doi:10.1163/156939312800030631

12. Purnamirza, T., T. A. Rahman, and M. H. Jamaluddin, "The extreme beamsquint technique to minimize the reflection coefficient of very small aperture radial line slot array antennas," Journal of Electromagnetic Waves and Applications, Vol. 26, No. 17-18, 2267-2276, Dec. 2012, doi: 10.1080/09205071.2012.733491.
doi:10.1080/09205071.2012.733491

13. Purnamirza, T., M. Ralibi, I. Ibrahim, A. Fitri, D. Rahmi, and S. Sutoyo, "A design of radial line slot array antennas using the specification of panel antennas," TELKOMNIKA (Telecommunication Comput. Electron. Control., Vol. 17, 3066, Dec. 2019, doi: 10.12928/telkomnika.v17i6.12679.
doi:10.12928/telkomnika.v17i6.12679

14. Takada, J., T. Yamamoto, M. Ando, and N. Goto, "An azimuthal multibeam radial line slot antenna for mobile satellite communication," Proceedings of ICUPC'95 --- 4th IEEE International Conference on Universal Personal Communications, 571-574, 1995, doi: 10.1109/ICUPC.1995.497073.
doi:10.1109/ICUPC.1995.497073

15. Davis, P. W., "A linearly polarised radial line slot array antenna for direct broadcast satellite services,", Thesis Report, University of Queensland, 2000.

Dr. Teddy Purnamirza

Dr. Rafiq Abdillah

Dr. Mulyono

Dr. Sutoyo

Dr. Rika Susanti

Dr. Muhammad I. Ibrahim

Dr. Depriwana Rahmi