Electromagnetic Bandgap Backed Millimeter-Wave MIMO Antenna for Wearable Applications


Iqbal, Amjad and Basir, Abdul and Smida, Amor and Mallat, Nazih Khaddaj and Elfergani, Issa and Rodriguez, Jonathan and Sunghwan, Kim (2019) Electromagnetic Bandgap Backed Millimeter-Wave MIMO Antenna for Wearable Applications. IEEE Access, 7. pp. 111135-111144. ISSN 2169-3536

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A millimeter-wave (mm-Wave) multiple input multiple output (MIMO) antenna operating at 24 GHz (ISM band), suitable for wearable applications, is proposed in this paper. The proposed MIMO antenna consists of two elements, designed with an edge-to-edge distance of 5.14 mm, backed by a 5 × 5 cell electromagnetic bandgap (EBG) structure. The antenna is fabricated on a flexible Rogers 6002 material (ϵ r =$ 2.94, tanδ = 0.0012, thickness = 0.254 mm). The proposed antenna retains its performance when bent along the x-axis and y-axis. The performance of the antenna in term of s-parameters and radiation properties is studied in free space as well as on a human phantom. Good impedance matching of the antenna at the resonating frequency (24 GHz) is observed when it is bent and when worn on the body. The introduction of the EBG improves the gain by 1.9 dBi, reduces the backward radiation by 8 dB, reduces the power density on the back towards the body from > 200 W/m 2 to <; 10 W/m 2 , and also enhances the 10 dB bandwidth by 100 MHz. The antenna possesses a low envelope correlation coefficient (ECC) of 0.24, high diversity gain (DG) of 9.7 dB, reasonable multiplexing efficiency of -0.684 dB and a good peak gain of 6 dBi at 24 GHz. The proposed antenna is suitable for wearable applications at mm-Wave range due to its simple geometry and good performance in bending and on-body worn scenarios.

Item Type: Article
Uncontrolled Keywords: Wearable Antenna, On-Body Antenna, mm-Wave Antenna, MIMO, S-Parameters.
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics > TK7871 Electronics--Materials
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Suzilawati Abu Samah
Date Deposited: 17 Feb 2022 01:50
Last Modified: 17 Feb 2022 01:50
URII: http://shdl.mmu.edu.my/id/eprint/9159


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