TY - JOUR
T1 - Compact Dual-Band Balanced MIMO Antenna for Wi-Fi 6/6E Applications in Tablet Computers With Metal Housing
AU - Gao, Yilin
AU - Zhu, Hongbin
AU - Ma, Ning
AU - Deng, Changjiang
AU - Lu, Hongda
AU - Wang, Zhengpeng
AU - Gao, Steven
N1 - Publisher Copyright:
© 2026 IEEE.
PY - 2026/6/1
Y1 - 2026/6/1
N2 - A compact dual-band balanced multiple-inputmultiple- output (MIMO) antenna is presented in this article for wireless fidelity (Wi-Fi) 6/6E applications in metal-housed tablet computers. To address the challenges of small clearance and metal housing, a systematic evolution of the proposed design, derived from a slot antenna pair with zero edge-to-edge spacing, highlights four key contributions. First, two balanced slot modes are deliberately excited to support consistent coverage and maintain robust performance against environmental detuning. Second, coupled-loaded C-shaped rings (CSRs) are first employed to simultaneously achieve a 59.5% size reduction and generate a transmission zero (TZ) via Fano-type resonance in the 6-GHz band. Third, an additional TZ is realized through modal cancellation, using a chip capacitor, to enhance isolation in the 5-GHz band. Consequently, dual-band coverage and decoupling across Wi-Fi 6/6E bands (5.15-5.83 GHz and 5.925-7.125 GHz) are achieved within a compact antenna footprint of 0:21 × 0:07 λ2 L. Finally, an 8×8 MIMO antenna system prototype is fabricated and experimentally verified in a metal-housed tablet platform. Measured results confirm a -6 dB impedance bandwidth (IBW) from 4.3 to 7.5 GHz. Within Wi-Fi 6/6E bands, measured total efficiency from 53.0% to 73.1% and isolation over 12.9 dB are obtained, with acceptable diversity performance.
AB - A compact dual-band balanced multiple-inputmultiple- output (MIMO) antenna is presented in this article for wireless fidelity (Wi-Fi) 6/6E applications in metal-housed tablet computers. To address the challenges of small clearance and metal housing, a systematic evolution of the proposed design, derived from a slot antenna pair with zero edge-to-edge spacing, highlights four key contributions. First, two balanced slot modes are deliberately excited to support consistent coverage and maintain robust performance against environmental detuning. Second, coupled-loaded C-shaped rings (CSRs) are first employed to simultaneously achieve a 59.5% size reduction and generate a transmission zero (TZ) via Fano-type resonance in the 6-GHz band. Third, an additional TZ is realized through modal cancellation, using a chip capacitor, to enhance isolation in the 5-GHz band. Consequently, dual-band coverage and decoupling across Wi-Fi 6/6E bands (5.15-5.83 GHz and 5.925-7.125 GHz) are achieved within a compact antenna footprint of 0:21 × 0:07 λ2 L. Finally, an 8×8 MIMO antenna system prototype is fabricated and experimentally verified in a metal-housed tablet platform. Measured results confirm a -6 dB impedance bandwidth (IBW) from 4.3 to 7.5 GHz. Within Wi-Fi 6/6E bands, measured total efficiency from 53.0% to 73.1% and isolation over 12.9 dB are obtained, with acceptable diversity performance.
KW - Balanced modes
KW - dual-band coverage
KW - metal housing
KW - multiple-input-multiple-output (MIMO) decoupling
KW - tablet antennas
KW - wireless fidelity (Wi-Fi) 6/6E
UR - https://www.scopus.com/pages/publications/105033393028
U2 - 10.1109/TAP.2026.3672999
DO - 10.1109/TAP.2026.3672999
M3 - Article
AN - SCOPUS:105033393028
SN - 0018-926X
VL - 74
SP - 5211
EP - 5222
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 6
ER -