Mashagba, Hamza A. and A. Rahim, Hasliza and Adam, Ismahayati and Jamaluddin, Mohd. Haizal and Mohd. Yasin, Mohd. Najib and Jusoh, Muzammil and Sabapathy, Thennarasan and Abdulmalek, Mohamedfareq and Al-Hadi, Azremi Abdullah and Ismail, Arif Mawardi and Ping, Jack Soh (2021) A hybrid mutual coupling reduction technique in a dual-band MIMO Textile Antenna for WBAN and 5G applications. IEEE Access, 9 . pp. 150768-150780. ISSN 2169-3536
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Official URL: http://dx.doi.org/10.1109/ACCESS.2021.3125049
Abstract
This paper presents a hybrid mutual coupling reduction technique applied onto a dual-band textile MIMO antenna for wireless body area network and 5G applications. The MIMO antenna consists of two hexagonal patch antennas, each integrated with a split-ring (SR) and a bar slot to operate in dual-band mode at 2.45 GHz and 3.5 GHz. Each patch is dimensioned at 47.2 × 31 mm2. This hybrid technique results in a simple structure, while enabling significant reduction of mutual coupling (MC) between the closely spaced patches (up to 0.1 λ). This technique combines a line patch and a patch rotation technique, explained as follows. First, a line patch is introduced at an optimized distance to enable operation with a broad impedance bandwidth at both target frequencies. One of the patches is then rotated by 90° at an optimized distance, resulting in a significant MC suppression while maintaining the dual and broad impedance bandwidth. The proposed MIMO antenna is further evaluated under several bending configurations to assess its robustness. A satisfactory agreement between simulated and measured results is observed in both planar and bending conditions. Results show that the MIMO antenna achieves an impedance bandwidth of 4.3 % and 6.79 % in the 2.45 GHz and 3.5 GHz band, respectively. Moreover, very low MC (S21 <-30 dB) is achieved, with a low (< 0.002) envelop correlation coefficient, and about 10 dB of diversity gain at both desired frequencies using this technique. Even when bent at an angle of 50° at the x-and y-axes, the antenna bent maintained a realized gain of 1.878 dBi and 4.027 dBi in the lower and upper band, respectively. A robust performance is offered by the antenna against the lossy effects of the human body with good agreements between simulated and measured results.
Item Type: | Article |
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Uncontrolled Keywords: | MIMO antenna, mutual coupling reduction, wearable, wearable antenna |
Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
Divisions: | Electrical Engineering |
ID Code: | 95711 |
Deposited By: | Yanti Mohd Shah |
Deposited On: | 31 May 2022 13:18 |
Last Modified: | 31 May 2022 13:18 |
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