Circular Ring Fractal UWB Antenna for Microwave Imaging Applications
Rafique, Umair; Agarwal, Shobit; Abbas, Syed Muzahir; Dalal, Priyanka; Ullah, Raza; Kiani, Saad Hassan (2023-09-13)
IEEE
13.09.2023
U. Rafique, S. Agarwal, S. M. Abbas, P. Dalal, R. Ullah and S. H. Kiani, "Circular Ring Fractal UWB Antenna for Microwave Imaging Applications," 2023 IEEE Wireless Antenna and Microwave Symposium (WAMS), Ahmedabad, India, 2023, pp. 1-4, doi: 10.1109/WAMS57261.2023.10242927
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© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists,or reuse of any copyrighted component of this work in other works.
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202402121691
https://urn.fi/URN:NBN:fi:oulu-202402121691
Tiivistelmä
Abstract
In this work, an ultra-wideband (UWB) planar antenna design is presented that is suitable for microwave imaging applications. The radiating element is comprised of three connected rings connected through thin metallic strips that correspond to fractal geometry. The antenna’s bottom side utilizes a stair-shaped slot-based partial ground plane to achieve UWB response. The use of a stair-shaped slot also helps in achieving good impedance matching in the UWB frequency range. The proposed antenna design exhibits a total dimension of 18×20 mm 2 . An impedance bandwidth of ≈31.68 GHz is observed within the frequency range of 3.32 GHz ≈ to beyond 35 GHz. Furthermore, the proposed UWB antenna shows a fractional bandwidth (FBW) of 165.35% and a peak gain of ≈8.5 dBi within the desired operating range. It is evident from the results that the proposed antenna exhibits exceptional low-dispersive characteristics across a broad frequency spectrum, which makes it highly suitable for microwave imaging applications.
In this work, an ultra-wideband (UWB) planar antenna design is presented that is suitable for microwave imaging applications. The radiating element is comprised of three connected rings connected through thin metallic strips that correspond to fractal geometry. The antenna’s bottom side utilizes a stair-shaped slot-based partial ground plane to achieve UWB response. The use of a stair-shaped slot also helps in achieving good impedance matching in the UWB frequency range. The proposed antenna design exhibits a total dimension of 18×20 mm 2 . An impedance bandwidth of ≈31.68 GHz is observed within the frequency range of 3.32 GHz ≈ to beyond 35 GHz. Furthermore, the proposed UWB antenna shows a fractional bandwidth (FBW) of 165.35% and a peak gain of ≈8.5 dBi within the desired operating range. It is evident from the results that the proposed antenna exhibits exceptional low-dispersive characteristics across a broad frequency spectrum, which makes it highly suitable for microwave imaging applications.
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