A parasitic patch loaded staircase shaped UWB MIMO antenna having notch band for WBAN applications

Islam, Tanvir, Ali, Esraa Mousa, Awan, Wahaj Abbas, Alzaidi, Mohammed S., Alghamdi, Thamer A.H. and Alathbah, Moath 2024. A parasitic patch loaded staircase shaped UWB MIMO antenna having notch band for WBAN applications. Heliyon 10 (1) , e23711. 10.1016/j.heliyon.2023.e23711

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Abstract

A staircase-shaped quasi-fractal antenna is presented to meet the requirements of compact electronics operating in UWB or E-UWB spectrum. A conventional broadband monopole antenna is converted into UWB antenna utilizing three iterations of fractal patches. The resultant antenna offers wide impedance bandwidth ranges 2.3–17.8 GHz, having a notch band at 6.1–7.2 GHz. Afterwards, a two-port MIMO antenna is created by placing the second element orthogonally with an edge-to-edge distance of 8.5 mm, that is λ/15 where λ corresponds to free space wavelength at the lowest cut-off frequency. Hereafter, a meandered line-shaped stub is inserted to reduce the mutual coupling between closely spaced MIMO elements to less than −25 dB. As the intended application of the proposed work is On-body, Specific Absorption Rate (SAR) analyses are carried out at 2.4, 5.8 and 8 GHz, showing an acceptable range for both 1-g and 10-g averaged tissues standards. Moreover, various parameters of the MIMO antenna are studied, and a comparison is made between simulated and measured results as well as those of the state of the art.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Elsevier
ISSN:	2405-8440
Date of First Compliant Deposit:	20 December 2023
Date of Acceptance:	12 December 2023
Last Modified:	20 Dec 2023 11:00
URI:	https://orca.cardiff.ac.uk/id/eprint/164955

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