volume | PIER Journals

Abstract

A compact four-port dual-band compact multiple-input multiple-output (MIMO) antenna system with reduced mutual coupling is proposed in this paper. The dual-band antenna operates in the frequency range covering 3.1-3.6 GHz (5G NR, n78) and in the newly introduced 5G midband spectrum of 5.925-7.125 GHz (5G NR, n96). The proposed MIMO antenna system is compact with dimensions 65 × 65 × 0.8 mm³ and has isolation ≤ -20 dB among all ports. The single monopole antenna is loaded with multiple resonant branches designed and optimized with impedance bandwidths of 14.92% at 3.35 GHz and 18.46% at 6.5 GHz. Impedance bandwidth, polarization diversity, and mutual coupling between elements for the designed four-port MIMO antenna system are measured. The proposed design is fabricated using an FR4 epoxy substrate, and the measured gain values are 3.9 dB and 4.8 dB for 3.3 GHz and 6.5 GHz, respectively, with nearly omnidirectional radiation pattern.

1. Dahlman, Erik, Stefan Parkvall, and Johan Skold, 5G NR: The Next Generation Wireless Access Technology, Academic Press, 2020.

2. Federal Communications Commission, "FCC opens 6 GHz band to Wi-Fi and other unlicensed uses," https://docs.fcc.gov/public/attachments/DOC-363945A1.pdf.

3. Hong, Wei, Zhi Hao Jiang, Chao Yu, Jianyi Zhou, Peng Chen, Zhiqiang Yu, Hui Zhang, Binqi Yang, Xingdong Pang, Mei Jiang, et al. "Multibeam antenna technologies for 5G wireless communications," IEEE Transactions on Antennas and Propagation, Vol. 65, No. 12, 6231-6249, 2017.

4. Ghosh, Amitabha, Andreas Maeder, Matthew Baker, and Devaki Chandramouli, "5G evolution: A view on 5G cellular technology beyond 3GPP release 15," IEEE Access, Vol. 7, 127639-127651, 2019.

5. Vook, Frederick W., Amitava Ghosh, and Timothy A. Thomas, "MIMO and beamforming solutions for 5G technology," 2014 IEEE MTT-S International Microwave Symposium (IMS2014), 1-4, Tampa, FL, USA, 2014.

6. Saurav, Kushmanda, Nazih Khaddaj Mallat, and Yahia M. M. Antar, "A three-port polarization and pattern diversity ring antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 17, No. 7, 1324-1328, 2018.

7. Sharma, Yashika, Debdeep Sarkar, Kushmanda Saurav, and Kumar Vaibhav Srivastava, "Three-element MIMO antenna system with pattern and polarization diversity for WLAN applications," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 1163-1166, 2016.

8. Malik, Jagannath, Amalendu Patnaik, and Machavaram Venkata Kartikeyan, "Novel printed MIMO antenna with pattern and polarization diversity," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 739-742, 2014.

9. Sarkar, Debdeep and Kumar Vaibhav Srivastava, "A compact four-element MIMO/diversity antenna with enhanced bandwidth," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 2469-2472, 2017.

10. Soltani, Saber, Parisa Lotfi, and Ross D. Murch, "A dual-band multiport MIMO slot antenna for WLAN applications," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 529-532, 2016.

11. Anitha, Ramachandran, Puthiyapurayil Viswanathan Vinesh, Sumitha Mathew, Pezholil Mohanan, and Kesavath Vasudevan, "Collocated MIMO antenna with reduced mutual coupling using square ring DGS," Progress In Electromagnetics Research C, Vol. 53, 119-125, 2014.

12. Zhang, Weiquan, Jiadong Hu, Yue Li, and Zhijun Zhang, "Design of a stacked co-polarized full-duplex antenna with broadside radiation," IEEE Transactions on Antennas and Propagation, Vol. 69, No. 11, 7111-7118, 2021.

13. Wei, Kun and Bo-Cheng Zhu, "The novel W parasitic strip for the circularly polarized microstrip antennas design and the mutual coupling reduction between them," IEEE Transactions on Antennas and Propagation, Vol. 67, No. 2, 804-813, 2019.

14. Deng, JingYa, JinYong Li, Luyu Zhao, and LiXin Guo, "A dual-band inverted-F MIMO antenna with enhanced isolation for WLAN applications," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 2270-2273, 2017.

15. Yang, Yingying, Qingxin Chu, and Chunxu Mao, "Multiband MIMO antenna for GSM, DCS, and LTE indoor applications," IEEE Antennas and Wireless Propagation Letters, Vol. 15, 1573-1576, 2016.

16. Choukiker, Yogesh Kumar, Satish K. Sharma, and Santanu K. Behera, "Hybrid fractal shape planar monopole antenna covering multiband wireless communications with MIMO implementation for handheld mobile devices," IEEE Transactions on Antennas and Propagation, Vol. 62, No. 3, 1483-1488, 2014.

17. Hallbjorner, P., "The significance of radiation efficiencies when using S-parameters to calculate the received signal correlation from two antennas," IEEE Antennas and Wireless Propagation Letters, Vol. 4, 97-99, 2005.

18. Ghannad, Amirhossein Alizadeh, Mohsen Khalily, Pei Xiao, Rahim Tafazolli, and Ahmed A. Kishk, "Enhanced matching and vialess decoupling of nearby patch antennas for MIMO system," IEEE Antennas and Wireless Propagation Letters, Vol. 18, No. 6, 1066-1070, 2019.

19. Liu, Heng-You, Chow-Yen-Desmond Sim, and Ci-Jin Huang, "Wideband MIMO antenna array design for future mobile devices operating in the 5G NR frequency bands n77/n78/n79 and LTE band 46," IEEE Antennas and Wireless Propagation Letters, Vol. 19, No. 1, 74-78, 2020.

20. Hei, Yong Qiang, Jia Geng He, and Wen Tao Li, "Wideband decoupled 8-element MIMO antenna for 5G mobile terminal applications," IEEE Antennas and Wireless Propagation Letters, Vol. 20, No. 8, 1448-1452, 2021.

Ms. Vishnupriya Rajagopalan

Dr. Sanish Vaipel Sanu

Dr. Stephen Rodrigues