A Small Ultra-wideband Circular Patch Antenna with Band-notched Characteristic

Authors L. Aguni1, S. Chabaa2, S. Ibnyaich1, A. Zeroual1

1Department of physics, Cadi Ayyad University Faculty of Sciences, Semlalia Marrakesh, Morocco

2Industrial Engineering Department, National School of Applied Sciences, Ibn Zohr University, Agadir, Morocco

Issue Volume 13, Year 2021, Number 2
Dates Received 14 February 2021; revised manuscript received 15 April 2021; published online 20 April 2021
Citation L. Aguni, S. Chabaa, S. Ibnyaich, A. Zeroual, J. Nano- Electron. Phys. 13 No 2, 02032 (2021)
DOI https://doi.org/10.21272/jnep.13(2).02032
PACS Number(s) 84.40.Ba, 06.30.Ft
Keywords Notch band, Patch antenna (2) , UWB (5) , VSWR, Group delay.

In this paper, we propose to design a circular microstrip patch antenna printed on FR4-epoxy dielectric substrate. The designed antenna will be able to operate for UWB (ultra-wideband) applications. The Federal Communication Commission (FCC) has approved the use of the frequency spectrum from 3.1 to 10.6 GHz for UWB applications. The proposed antenna has a large bandwidth, which covers the frequency band of 3.85-12.38 GHz except the notch band of 5.1-6 GHz, which is the main characteristic of the presented antenna. This feature allows to avoid interferences with applications operating at this band such as WLAN, IEEE 802.11a, and HIPERLAN/2. Besides these characteristics, the designed antenna has a simple structure and small sizes of 24x14x0.8 mm3. The principal operating parameters of the antenna like VSWR, radiation pattern, radiation efficiency, and group delay are simulated using both HFFS and CST electromagnetic simulators. The variation of the group delay of the antenna in the frequency band from 3.85 to 12.38 GHz is almost constant at around 1.25 ns and presents small fluctuations, except in the vicinity of the 5.1-5.8 GHz notch band whose group delay drops from 1.5 ns to – 2 ns. These features make the proposed antenna a better device for UWB applications.

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