volume | PIER Journals

Abstract

This article presents the design and implementation of a beam-steering antenna array using a 4x4 Butler matrix feed network (BMN) for 5G applications. The proposed antenna array can achieve a gain of 14 dBi and a steering range of (+16º, -47º, +46.5º, -15.7º) to cover angular range extending from 45º to 135º. To achieve that, a simple, 4x4 Butler matrix etched on a single-layer microstrip structure is designed, optimized, and fabricated. The proposed design incorporates phase shifters, 3-dB couplers, and cross-over couplers. The proposed matrix is employed as a feeding network for 4-element wideband LPDA antenna array. The fabrication results of the feeding matrix and antenna array show very good agreement with the simulated results.

1. Eid, R., A. Elboushi, and M. Hindy, "Wideband monopole antenna with multiple stub resonators for 5G applications," 2021 38th National Radio Science Conference (NRSC), Vol. 1, 80-87, IEEE, 2021.
doi:10.1109/NRSC52299.2021.9509812

2. Ikram, M., K. S. Sultan, A. M. Abbosh, and N. Nguyen-Trong, "Sub-6 GHz and mm-wave 5G vehicle-to-everything (5G-V2X) MIMO antenna array," IEEE Access, Vol. 10, 49688-49695, 2022.
doi:10.1109/ACCESS.2022.3172931

3. Sultan, K., M. Ikram, and N. Nguyen-Trong, "A multiband multibeam antenna for sub-6 GHz and mm-wave 5G applications," IEEE Antennas and Wireless Propagation Letters, Vol. 21, No. 6, 1278-1282, 2022.
doi:10.1109/LAWP.2022.3164627

4. Shehata, R. E. A., A. Elboushi, M. Hindy, and H. Elmekati, "Metamaterial inspired LPDA MIMO array for upper band 5G applications," International Journal of RF and Microwave Computer- Aided Engineering, Vol. 32, No. 8, e23212, 2022.
doi:10.1002/mmce.23212

5. Shehata, R. E. A., M. Hindy, H. Elmekati, and A. Elboushi, "Circularly polarized directive hybrid patch/horn antenna for upper band 5G applications," Microwave and Optical Technology Letters, 2022, DOI:10.1002/mop.33489.

6. Alam, M. M., "Microstrip antenna array with four port butler matrix for switched beam base station application," 2009 12th International Conference on Computers and Information Technology, 531-536, IEEE, 2009.

7. Hong, W., K.-H. Baek, and S. Ko, "Millimeter-wave 5G antennas for smartphones: Overview and experimental demonstration," IEEE Transactions on Antennas and Propagation, Vol. 65, No. 12, 6250-6261, 2017.
doi:10.1109/TAP.2017.2740963

8. Hong, W., Z. H. Jiang, C. Yu, et al. "Multibeam antenna technologies for 5G wireless communications," IEEE Transactions on Antennas and Propagation, Vol. 65, No. 12, 6231-6249, 2017.
doi:10.1109/TAP.2017.2712819

9. Nolen, J., "Synthesis of multiple beam networks for arbitrary illuminations,", Ph.D. dissertation, 1965.

10. Rotman, W. and R. Turner, "Wide-angle microwave lens for line source applications," IEEE Transactions on Antennas and Propagation, Vol. 11, No. 6, 623-632, 1963.
doi:10.1109/TAP.1963.1138114

11. Mosca, S., F. Bilotti, A. Toscano, and L. Vegni, "A novel design method for Blass matrix beam-forming networks," IEEE Transactions on Antennas and Propagation, Vol. 50, No. 2, 225-232, 2002.
doi:10.1109/8.997999

12. Rahimian, A., "Microwave beamforming networks employing Rotman lenses and cascaded Butler matrices for automotive communications beam scanning electronically steered arrays," 2011 Microwaves, Radar and Remote Sensing Symposium, 351-354, IEEE, 2011.
doi:10.1109/MRRS.2011.6053671

13. Kim, S., S. Yoon, Y. Lee, and H. Shin, "A miniaturized Butler matrix based switched beamforming antenna system in a two-layer hybrid stackup substrate for 5G applications," Electronics, Vol. 8, No. 11, 1232, 2019.
doi:10.3390/electronics8111232

14. Ashraf, N., A.-R. Sebak, and A. A. Kishk, "PMC packaged single-substrate 4 × 4 Butler matrix and double-ridge gap waveguide horn antenna array for multibeam applications," IEEE Transactions on Microwave Theory and Techniques, Vol. 69, No. 1, 248-261, 2020.
doi:10.1109/TMTT.2020.3022092

15. Lee, S., Y. Lee, and H. Shin, "A 28-GHz switched-beam antenna with integrated Butler matrix and switch for 5G applications," Sensors, Vol. 21, No. 15, 5128, 2021.
doi:10.3390/s21155128

16. Alu, A., M. G. Silveirinha, A. Salandrino, and N. Engheta, "Epsilon-near-zero metamaterials and electromagnetic sources: Tailoring the radiation phase pattern," Phys. Rev. B, Vol. 75, No. 15, 155410, 2007.
doi:10.1103/PhysRevB.75.155410

17. Chen, X., T. M. Grzegorczyk, B.-I.Wu, J. Pacheco, Jr., and J. A. Kong, "Robust method to retrieve the constitutive effective parameters of metamaterials," Phys. Rev. E, Vol. 70, No. 1, 016608, 2004.
doi:10.1103/PhysRevE.70.016608

18. Imani, A. and M. S. Bayati, "A novel design of compact broadband 4 × 4 Butler matrix-based beamforming antenna array for C-band applications," AEU --- International Journal of Electronics and Communications, Vol. 138, 153901, 2021.
doi:10.1016/j.aeue.2021.153901

19. Abdulbari, A. A., S. K. A. Rahim, et al. "A review of hybrid couplers: State-of-the-art, applications, design issues and challenges," International Journal of Numerical Modelling Electronic Networks Devices and Fields, Vol. 34, No. 5, e2919, 2021.
doi:10.1002/jnm.2919

20. Balanis, C. A., "Antenna theory: A review," Proceedings of the IEEE, Vol. 80, No. 1, 7-23, 1992.
doi:10.1109/5.119564

Dr. Rania Eid A. Shehata

Dr. Moataza Hindy

Prof. Hamdi Elmekati

Dr. Ayman Mohamed Fekry Elboushi