Asymmetry Antenna Module Based on Two Eighth-Mode SIW Resonators for MIMO Applications

Introduction. The ever-increasing demands on the speed of information transmission lead to an increasing adoption of MIMO systems in telecommunication networks. There are a number of works devoted to the possibility of using MIMO antenna modules based on SIW resonators. One of the promising directions in this field is the use of 1/4 and 1/8 mode SIW resonators, which can significantly reduce the weight and size characteristics of the device. The main disadvantages of such MIMO antennas are the narrow frequency band and a relatively low isolation of the radiators. Therefore, the advancement of engineering approaches to designing MIMO modules that boost these attributes is a relevant research task.
Aim. Development of innovative engineering approaches to designing antenna modules utilizing 1/8 mode SIW resonators for application in MIMO, which enhance their radiation properties and improve the isolation between the radiators.
Materials and methods. The characteristics of the antenna module were simulated in software packages using the finite element method. The prototype antenna module was manufactured using a metallized composite polytetrafluoroethylene material. The network analyzer Ceyear 3272C was used to measure the characteristics of the antenna module prototype.
Results. The MIMO module based on two 1/8-mode SAW resonators with notable improvement in both the gain of the radiation elements and their isolation was developed. The results of a study into the relationship between substrate thickness and the features of the module are presented. The possibility of using the developed module in dual-band systems by operating not only on the main, but also on the higher resonant mode of SIW resonators is demonstrated. The design of a MIMO module consisting of eight radiation elements is proposed.
Conclusion. The MIMO module design based on two 1/8-mode SIW resonators separated by a gap can be used in dual-band systems operated in several modes. An increase in the substrate thickness was shown to lead to both an improvement in the module’s antenna gain and a reduction in their insulation effectiveness. An antenna module design based on a pair of 1/8-mode SAW resonators, which enables improved insulation between the radiators (up to –30 dB), is proposed.

1. Integrated LTE and millimeter-wave 5G MIMO antenna system for 4G/5G wireless terminals / S. Iffat Naqvi, N. Hussain, A. Iqbal, M. Rahman, M. Forsat, S. S. Mirjavadi, Y. Amin // Sensors. 2020. Vol. 20, iss. 14. Art. № 3926. doi: 10.3390/s20143926

2. A novel high gain wideband MIMO antenna for 5G millimeter wave applications / D. A. Sehrai, M. Abdullah, A. Altaf, S. H. Kiani, F. Muhammad, M. Tufail, M. Irfan, A. Glowacz, S. Rahman // Electronics. 2020. Vol. 9, iss. 6. Art. № 1031. doi: 10.3390/electronics9061031

3. Sghaier N., Latrach L. Design and analysis of wideband MIMO antenna arrays for 5G smartphone application // Intern. J. of Microwave and Wireless Technologies. 2022. Vol. 14, iss. 4. P. 511–523. doi: 10.1017/S1759078721000659

4. MIMO antennas: Design approaches, techniques and applications / P. Sharma, R. N. Tiwari, P. Singh, P. Kumar, B. K. Kanaujia // Sensors. 2022. Vol. 22, iss. 20. Art. № 7813. doi: 10.3390/s22207813

5. Metamaterial‐based highly isolated MIMO antenna system for 5G smartphone application / I. U. Din, S. Ullah, N. Mufti, R. Ullah, B. Kamal, R. Ullah // Intern. J. of Communication Systems. 2023. Vol. 36, iss. 3. Art. № e5392. doi: 10.1002/dac.5392

6. Isolation enhancement in dual-band monopole antenna for 5G applications / W. Wang, Y. Wu, W. Wang, Y. Yang // IEEE Transactions on Circuits and Systems II: Express Briefs. 2020. Vol. 68, iss. 6. P. 1867–1871. doi: 10.1109/TCSII.2020.3040164

7. Ameen M., Chaudhary R. K. Isolation enhancement of metamaterial-inspired two-port MIMO antenna using hybrid techniques // IEEE Transactions on Circuits and Systems II: Express Briefs. 2023. Vol. 70, iss. 6. P. 1966–1970. doi: 10.1109/TCSII.2023.3237831

8. Compact SIW fed dual-port single element annular slot MIMO antenna for 5G mmWave applications / M. Usman, E. Kobal, J. Nasir, Y. Zhu, Ch. Yu, A. Zhu // IEEE Access. 2021. Vol. 9. P. 91995–92002. doi: 10.1109/ACCESS.2021.3091835

9. Pant M., Malviya L. SIW MIMO antenna with high gain and isolation for fifth generation wireless communication systems // Frequenz. 2024. Vol. 78, iss. 9–10. P. 479–497. doi: 10.1515/freq-2023-0440

10. Niu B. J., Cao Y. J. Bandwidth‐enhanced four‐antenna MIMO system based on SIW cavity // Electronics Let. 2020. Vol. 56, iss. 13. P. 643–645. doi: 10.1049/el.2020.0799

11. Kumari P., Das S. A Wideband Circularly Polarized SIW MIMO Antenna Based on Coupled QMSIW and EMSIW Resonators for Sub-6GHz 5G Applications // IEEE Antennas and Wireless Propaga-tion Let. 2024. Vol. 23, iss. 10. P. 2979–2983.

12. A Quad-Band Shared-Aperture Antenna Based on Dual-Mode Composite Quarter-Mode SIW Cavity for 5G and 6G with MIMO Capability / A. T. Altakhaineh, S. S. Alja’afreh, A. M. Almatarneh, E. Almajali, L. Al-Tarawneh, J. Yousaf // Electronics. 2023. Vol. 12, iss. 11. Art. № 2480. doi: 10.3390/electronics12112480

13. Niu B. J., Tan J. H. Compact SIW cavity MIMO antenna with enhanced bandwidth and high isolation // Electronics Let. 2019. Vol. 55, iss. 11. P. 631–632. doi: 10.1049/el.2019.0838

14. Niu B. J., Tan J. H. Compact three‐antenna MIMO system based on triangular half‐mode substrate‐integrated‐waveguide cavity // Intern. J. of RF and Microwave Computer‐Aided Engineering. 2020. Vol. 30, iss. 10. Art. № e22352. doi: 10.1002/mmce.22352

15. A compact size and high isolation dual-band mimo antenna using emsiw / S. A. Ali, M. Wajid, M. Hashmi, M. Sh. Alam // 5th Intern. Conf. on Multimedia, Signal Processing and Communication Technologies (IMPACT), Aligarh, India, 26–27 Nov. 2022. IEEE, 2022. P. 1–5. doi: 10.1109/IMPACT55510.2022.10029292

16. An Adaptation of the Split-Cylinder Resonator Method for Measuring the Microwave Properties of Thin Ferroelectric Films in a "Thin Film—Substrate" Structure / A. Gagarin, D. Tsyganova, A. Altynnikov, A. Komlev, R. Platonov // Sensors. 2024. Vol. 24, iss. 3. Art. № 755. doi: 10.3390/s24030755