volume | PIER Journals

Abstract

A highly isolated MIMO antenna is designed using a neutralization line (NL), stubs, and slots for 5G, Wi-MAX, and WLAN operations. A quarter circular ring monopole is modified to have a circular outer shape and a polygon inner shape. Thickness of the monopole is reduced to decrease the electromagnetic (EM) coupling between the higher order modes and to obtain dual band characteristics. A two-element MIMO antenna is designed. High isolation is achieved by combining isolation techniques of neutralization line with stubs and slots. Isolation >20 dB is achieved with stubs and slots in ground plane. Without altering the overall dimensions, isolation is improved from 20 dB to 30 dB by using an NL in the MIMO structure that uses slots and stubs in the ground plane as isolation techniques. S₁₁ < -10 dB over 2.9-3.9 GHz and 5.6-6.2 GHz and S₁₂ < -30 dB over 3.3-3.9 GHz, and S₁₂ < -40 dB over 5.6-6.2 GHz covering 5G, Wi-MAX, V2X, and WLAN bands are obtained. The antenna has stable radiation patterns. ECC (Envelope Correlation Coefficient) < 0.002, DG (Diversity Gain) close to 10 dB, and MEG (Mean Effective Gain) about 0 dB satisfy MIMO specifications. The compact, low-cost antenna on a 30 × 50 mm FR4 substrate is simple to design and fabricate. These features make it a suitable candidate for 5G, Wi-MAX, and WLAN applications.

1. Jensen, M. A. and J. W. Wallace, "A review of antennas and propagation for MIMO wireless communications," IEEE Transactions on Antennas and Propagation, Vol. 52, No. 11, 2810-2824, 2004. Google Scholar

2. Nadeem, Iram and Dong-You Choi, "Study on mutual coupling reduction technique for MIMO antennas," IEEE Access, Vol. 7, 563-586, 2019. Google Scholar

3. Chouhan, Sanjay, Debendra Kumar Panda, Manish Gupta, and Sarthak Singhal, "Multiport MIMO antennas with mutual coupling reduction techniques for modern wireless transreceive operations: A review," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 28, No. 2, e21189, 2017. Google Scholar

4. Naser-Moghadasi, Mohammad, Rahele Ahmadian, Zahra Mansouri, Ferdows B. Zarrabi, and Maryam Rahimi, "Compact EBG structures for reduction of mutual coupling in patch antenna MIMO arrays," Progress In Electromagnetics Research C, Vol. 53, 145-154, 2014. Google Scholar

5. Veeramani, A., Afsane Saee Arezomand, J. Vijayakrishnan, and Ferdows B. Zarrabi, "Compact S-shaped EBG structures for reduction of mutual coupling," 2015 Fifth International Conference on Advanced Computing & Communication Technologies, 21-25, Haryana, India, 2015.

6. Panda, Asit K., Sudhakar Sahu, and Rabindra K. Mishra, "A compact dual‐band 2 × 1 metamaterial inspired MIMO antenna system with high port isolation for LTE and WiMax applications," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 27, No. 8, e21122, 2017. Google Scholar

7. Deng, Jing Ya, Zhu Jun Wang, Jin Yong Li, and Li Xin Guo, "A dual‐band MIMO antenna decoupled by a meandering line resonator for WLAN applications," Microwave and Optical Technology Letters, Vol. 60, No. 3, 759-765, 2018. Google Scholar

8. Hussain, Rifaqat, Muhammad Umar Khan, and Mohammad S. Sharawi, "An integrated dual MIMO antenna system with dual-function GND-plane frequency-agile antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 17, No. 1, 142-145, 2018. Google Scholar

9. Nirmal, Pratima Chabbilal, Anil Nandgaonkar, Sanjay Laxmikant Nalbalwar, and Rajiv Kumar Gupta, "A compact dual band MIMO antenna with improved isolation for Wi-Max and WLAN applications," Progress In Electromagnetics Research M, Vol. 68, 69-77, 2018. Google Scholar

10. Wang, Wen, Yongle Wu, Weimin Wang, and Yuhao Yang, "Isolation enhancement in dual-band monopole antenna for 5G applications," IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 68, No. 6, 1867-1871, 2021. Google Scholar

11. Bait-Suwailam, Mohammed M., Thamer Almoneef, and Saud M. Saeed, "Wideband MIMO antenna with compact decoupling structure for 5G wireless communication applications," Progress In Electromagnetics Research Letters, Vol. 100, 117-125, 2021. Google Scholar

12. Pradeep, Pendli, Jaya Sankar Kottareddygari, and Chandra Sekhar Paidimarry, "A compact 4 x 4 peace-shaped wideband MIMO antenna for sub-6 GHz 5G wireless applications," International Journal of Microwave & Optical Technology, Vol. 17, No. 5, 508, 2022. Google Scholar

13. Kadu, Mahesh, Ramesh Pawase, Pankaj Chitte, and Vilas S. Ubale, "Compact dual-band antenna design for sub-6 GHz 5G application," Bulletin of Electrical Engineering and Informatics, Vol. 13, No. 3, 1656-1666, 2024. Google Scholar

14. Jha, Pankaj, Anubhav Kumar, Deepak Sahu, and Navneet Sharma, "Isolation enhancement of two element MIMO antenna based on neutralization technique," 2023 3rd International Conference on Advancement in Electronics & Communication Engineering (AECE), 355-359, GHAZIABAD, India, 2023.

15. Yu, Yantao, Xiaoya Liu, Zhaokai Gu, and Lijun Yi, "A compact printed monopole array with neutralization line for UWB applications," 2016 IEEE International Symposium on Antennas and Propagation (APSURSI), 1779-1780, Fajardo, PR, USA, 2016.

16. Babu, K. V. and B. Anuradha, "Design of Wang shape neutralization line antenna to reduce the mutual coupling in MIMO antennas," Analog Integrated Circuits and Signal Processing, Vol. 101, No. 1, 67-76, 2019. Google Scholar

17. Dkiouak, Aziz, Mohssine El Ouahabi, Saad Chakkor, Mostafa Baghouri, Alia Zakriti, and Youssef Lagmich, "High performance UWB MIMO antenna by using neutralization line technique," Progress In Electromagnetics Research C, Vol. 131, 185-195, 2023. Google Scholar

18. Yu, Yantao, Lijun Yi, Xiaoya Liu, and Zhaokai Gu, "Compact dual-frequency microstrip antenna array with increased isolation using neutralization lines," Progress In Electromagnetics Research Letters, Vol. 56, 95-100, 2015. Google Scholar

19. Dileepan, Dhanasekaran, Somasundaram Natarajan, and Rengasamy Rajkumar, "A high isolation multiband MIMO antenna without decoupling structure for WLAN/WiMAX/5G applications," Progress In Electromagnetics Research C, Vol. 112, 207-219, 2021. Google Scholar

20. Yang, Ming and Jinzhi Zhou, "A compact pattern diversity MIMO antenna with enhanced bandwidth and high‐isolation characteristics for WLAN/5G/WiFi applications," Microwave and Optical Technology Letters, Vol. 62, No. 6, 2353-2364, 2020. Google Scholar

21. Khade, Alka, Mahadu A. Trimukhe, Shubhangi M. Verulkar, and Rajiv K. Gupta, "Dual band MIMO antenna with high isolation for GSM and WLAN applications," Progress In Electromagnetics Research C, Vol. 136, 189-198, 2023. Google Scholar

22. Kakkar, Ashna, Malay Ranjan Tripathy, Arun Kumar Singh, et al. "A novel compact two element MIMO antenna with pie shaped slot structure for dual band applications," 2017 Progress in Electromagnetics Research Symposium --- Fall (PIERS --- FALL), 336-341, Singapore, Nov. 2017.

23. Yahya, Likaa S., Loay S. Yahya, and Khalil H. Sayidmarie, "A crescent-shaped monopole MIMO antennas with improved isolation for dual-band WLAN applications," Progress In Electromagnetics Research C, Vol. 117, 115-127, 2021. Google Scholar

24. Tiwari, Rakesh N., Prabhakar Singh, Shivam Pandey, Ritika Anand, Dinesh Kumar Singh, and Binod Kumar Kanaujia, "Swastika shaped slot embedded two port dual frequency band MIMO antenna for wireless applications," Analog Integrated Circuits and Signal Processing, Vol. 109, No. 1, 103-113, 2021. Google Scholar

25. Naidu, Praveen Vummadisetty, Dhanekula Maheshbabu, Akkapanthula Saiharanadh, Arvind Kumar, Neelima Dudi, Lam Sumanji, and Khalim Amjad Meerja, "A compact four-port high isolation hook shaped ACS fed MIMO antenna for dual frequency band applications," Progress In Electromagnetics Research C, Vol. 113, 69-82, 2021. Google Scholar

26. Naidu, Praveen V., Akkapanthula Saiharanadh, Dhanekula Maheshbabu, Arvind Kumar, and Neelima Vummadisetty, "Design and performance analysis of g-shaped compact ACS fed 4-port MIMO antenna for triple frequency band applications," Progress In Electromagnetics Research C, Vol. 112, 55-68, 2021. Google Scholar

27. Khade, Alka, Mahadu Trimukhe, Shishir Jagtap, and Rajiv K. Gupta, "A circular sector with an inverted L shaped monopole antenna for tri-band applications," Progress In Electromagnetics Research C, Vol. 118, 177-186, 2022. Google Scholar

28. Achariparambil, Abhilash, Karamkulambel Kunjappan Indhu, Ramakrishnan Anil Kumar, Kinatingal Neema, and Chandroth K. Aanandan, "Ultra-wideband quad element MIMO antenna on a flexible substrate for 5G and wearable applications," Progress In Electromagnetics Research C, Vol. 126, 143-155, 2022. Google Scholar

29. Khan, Muhammad Kabir, Quanyuan Feng, and Zongliang Zheng, "Experimental investigation and design of UWB MIMO antenna with enhanced isolation," Progress In Electromagnetics Research C, Vol. 107, 287-297, 2021. Google Scholar

30. Biswal, Sonika Priyadarsini and Sushrut Das, "Two‐element printed PIFA‐MIMO antenna system for WiMAX and WLAN applications," IET Microwaves, Antennas & Propagation, Vol. 12, No. 14, 2262-2270, 2018. Google Scholar

31. Konade, Shivanand and Manoj Dongre, "Compact two-port MIMO antenna with high isolation for UWB applications," Iranian Journal of Electrical & Electronic Engineering, Vol. 20, No. 2, 1-9, 2024. Google Scholar

32. Pradeep, Pendli, K. Jaya Sankar, and Chandra Sekhar Paidimarry, "Design of a compact wideband two-port MIMO antenna for NR 5G sub-6 GHz band wireless applications," Wireless Personal Communications, Vol. 138, No. 2, 1193-1210, 2024. Google Scholar

33. Prakash, P., G. Manoj, and J. Samson Immanuel, "A comprehensive review: Advances in MIMO antenna for IOT application," Wireless Personal Communications, Vol. 136, No. 2, 793-826, 2024. Google Scholar

34. Jagadeesan, Karthi and Palanivelan Manickavelu, "Isolation enhancement techniques in MIMO antenna systems: A survey," Telecommunications and Radio Engineering, Vol. 83, No. 11, 1-12, 2024. Google Scholar

35. Manage, Prabhakar S., Udaykumar Naik, and Vijay Rayar, "Compact design of MIMO antenna with split ring resonators for UWB applications," Nano Communication Networks, Vol. 41, 100512, 2024. Google Scholar

36. Feng, Hanbo, Zhonggen Wang, Wenyan Nie, and Ming Yang, "High-gain dual-band metasurface MIMO antenna for enhanced 5G and satellite applications," Progress In Electromagnetics Research C, Vol. 156, 13-22, 2025. Google Scholar

37. Khade, Alka, M. Trimukhe, S. Verblkar, and Rajiv Kumar Gupta, "Miniaturization of printed rectangular monopole antenna by using slots for triple band applications," Progress In Electromagnetics Research C, Vol. 130, 155-167, 2023. Google Scholar

Mr. Amit A. Deshmukh

Prof. Shankar D. Nawale

Dr. Vijay Ramesh Kapure

Dr. Shubhangi A. Deshmukh

Dr. Mahadu Trimukhe

Professor Rajiv Kumar Gupta