Ultra-wideband 8-port MIMO antenna for 5G smartphone applications based on characteristic mode theory
Abstract
An ultra-wideband eight-port multiple-input-multiple-output (MIMO) antenna suitable for fifth-generation smartphones based on characteristic mode theory is proposed. The total size of the MIMO antenna is 154 mm × 74 mm × 1.5 mm. By exciting the TM10 mode, the bandwidth of |S11| < −10 dB covers 3.23-6 GHz. This bandwidth fully covers the N77/N78/N79 and wireless local area network bands for 5G applications. The antenna achieves a port isolation of better than – 15 dB and an envelope correlation coefficient of less than 0.02 without any decoupling structure. The total efficiency reaches approximately 90% over the operation band. Furthermore, simulation results show that the antenna performance remains almost unchanged under practical usage scenarios, such as handheld operation. Measurement results show that the S-parameters and radiation performance agree well with the simulated results.
Fields of Study & Subjects
Antenna Design and Analysis
Wireless Body Area Networks
Bluetooth and Wireless Communication Technologies
Publication details
- Journal / source
- Journal of Electromagnetic Waves and Applications
- Publisher
- Informa UK Limited
- Volume
- 40
- Issue
- 9
- Pages
- 1438–1452
- Publication date
- 26 February 2026
- Language
- EN