Mutual Coupling Reduction For Triple Band MIMO Antenna Using Stub Loading Technique


  • Adamu Halilu Jabire Department of Electrical/Electronics, Taraba State University Jalingo
  • Aminu Gambo Abdullahi 2. National Commission for Museums and Monument, Kano, Nigeria
  • Sani Saminu 3. Dept. of Biomedical Engineering ,University of Ilorin, Ilorin, Nigeria,
  • Adamu Mohammed Jajere School of Microelectronics, Tianjin University, Tianjin, P.R. China
  • Abubakar Muhammad Sadiq School of Microelectronics, Tianjin University, Tianjin, P.R. China



Multiple Input Multiple Output Antenna, Mutual Coupling, Decoupling Structure, Stub. Isolation


In this study, a mutual coupling reduction using stub and partial ground structure is presented. A decoupling network is proposed which consists of one long stub extended between the four defected ground structures for electromagnetic interaction abatement. The array design offers a reduction in mutual coupling level by less than 15dB at 3GHz, less than 30dB at 5.5GHz, and also less than 15dB at 7.1GHz. The proposed 4x4 MIMO microwave circuit (antenna) attained an envelope correlation coefficient of lower than 0.1, a diversity gain of almost 10dB, a total active reflection coefficient of lower than 0dB, and channel capacity loss of less than 0.35bits/sec/Hz respectively. The four elements with four ports have been integrated on a 60x60mm2 substrate with the FR4 dielectric layer. The microwave circuit was simulated using CST studio 2017 resulting in an operating frequency of 3GHz, 5.5GHz, and 7.1GHz at -10dB.


Chandan K. G., Manish P., Rahul K., & Saurabh P. (2020). Mutual Coupling Reduction of Microstrip MIMO Antenna using Microstrip Resonator. Wireless Personal Communication, 112, pp. 2047-2056.

Cheng Y. & Cheng K. M. (2020). Compact Wideband Decoupling and Matching Network Design for Dual-Antenna Array. IEEE Antennas and Wireless Propagation Letters, 19(5), pp. 791-795.

Chouhan S., Panda D. K., Gupta M., & Singha S. (2018). Multiport MIMO antennas with mutual coupling reduction techniques for modern wireless transceive operation: A review. International J. RF Microw Computer-Aided Engineering, 28: e21189.

Dabas T., Gangwar D., Kanaujia B. K., & Gautam A. K. (2018). Mutual Coupling Reduction Between Elements of UWB MIMO Antenna using Small Size Uniplanar EBG Exhibiting Multiple Stopbands. International Journal of Electronics and Communication, 93, pp. 32-38.

Dipesh K., Vivek S., Cher M. T., Vani P., & Nirdosh T. (2020). Optimization of a T-shaped MIMO Antenna for the Reduction of EMI. Applied Science, 10(0), pp. 1-15.

Elwi T. A. (2018). A miniaturized folded Antenna Array for MIMO Applications. Wireless Personal Communication, 98(2), pp. 1871-1883.

Hassan MN, Chu S, & Bashir S. (2019). A DGS Monopole Antenna Loaded with a U-shape Stub for UWB MIMO Applications. Microwave Optical Technological Letters, 61, pp. 2141-2149.

Jabire A. H., Abdu A., Samin S., Sadiq A. M., & Mohammed J. A. (2019). Isolation Frequency Switchable MIMO Antenna for PCS, WiMAX, and WLAN Application. Elektrika Journal of Electrical Engineering, 18(3), pp. 27-33.

Jabire A. H., Zheng H., & Abdu A. (2019). Split Rectangular Loop Resonator Inspired MIMO Monopoles for GSM/LTE/WLAN Applications, Journal of Communications, 14(6), pp. 511-517.

Jabire A. H., Zheng H., Abdu A., & Song Z. (2019). Characteristic Mode Analysis and Design of Wideband MIMO Antenna Consisting of Metamaterial Unit Cell, Electronics, 8(1), pp. 1-14.

Jeet B., Abhik, G., & Rowdra G. (2020). Design and Analysis of a Compact UWB MIMO Antenna Incorporating Fractal Inspired Isolation Improvement and Band Rejection Structure. Inter. Journal of Electronics and Communications, 122, pp. 1-9.

Khalil N. M., Shareef O. A., Mosleh M. F., & Abd-Alhameed R. A. (2020). A Design of MIMO Prototype in C-Band Frequency for Future Wireless Communications. Advanced Electromagnetics, 9(1), pp. 78-84.

Kumar A., Ansari A. Q., Kanaujia B. K., Kishor J., Kumar S. (2020). An Ultra-compact two-port UWB-MIMO Antenna with Dual Band-notched Characteristics. Int. J. Electron. Commun. (AEÜ) 114 152997, pp. 1-12.

Luo S., Li Y., Xia Y., & Zhang L. (2019). A Low Mutual Coupling Antenna Array with Gain Enhancement using Metamaterial Loading and Neutralization Line Structure. ACES Journal, 34(3), pp. 411-418.

Megha M. K., Jayakumar M. (2020). Design and Analysis of Circularly Polarized Dual Patch Antenna with Improved Isolation for MIMO Satellite. International Journal of Microwave and Optical Technology, 15(2), pp. 155-158.

Min L., Bing G. Z., & Cheung S. W. (2019). Isolation Enhancement for MIMO Patch Antennas Using Near-Field Resonators as Coupling-Mode Transducers. IEEE Transactions on Antennas and Propagation, 67(2), pp. 755-764.

Muhammad S. K., Antonio-Daniele C., Adnan I., Sajid A., & Benjamin D. B. (2016). A Compact Dual Polarized Ultra-Wideband Multiple-Input-Multiple-Output Antenna. Microwave and Optical Technology Letters, 58(1), pp. 163-166.

Mukesh K. K. (2020). Metamaterial Based Circularly Polarized Four-port MIMO Diversity Antenna Embedded with a Slow-wave Structure for Miniaturization and Suppression of Mutual Coupling, Inter. Journal of Electronics and Communications, 121, pp. 1-10.

Patchala, K., Rao Y. R., Prasad A. M. (2020). Triple Band-notch Compact MIMO Antenna with Defected Ground Structure and Split Ring Resonator for Wideband Applications. Heliyon 6 e03078, pp. 1-7.

Qian K., Huang G., Liang J., Qian B., & Yuan T. (2018). An LTCC Interference Cancellation Device for Closely Spaced Antenna decoupling, IEEE Access 6, pp. 68255-68262.

Saleh A. M., Nagim T. A., Abd-Alhameed R. A., Noras J. M. & See C. H. (2020). Mutual Coupling Reduction of Dual-band Uniplanar MIMO System using Neutralization Line Technique. Applied Computational Electromagnetic Society Journal, 35(2), pp. 176-186.

Sanae El., Abdelfatteh H., & Hayat, J. (2019). Road to 5G: Key enabling technologies. Journal of Communication, 14(11), pp. 1034-1048.

Vandana S. & Shikha N. (2018). Two Element Compact UWB Diversity Antenna with a Combination of DGS and Parasitic Elements, Wireless Personal Communication, 98, pp. 2901-2911.

Vara P. K. & Venkata P. M. (2020). A slot-shape EBG Structure for Improving the Isolation Between Patch Arrays. International Journal of Microwave & Optical Technology, 15(3), pp. 269-278.