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Design of UWB microstrip patch antenna with variable band notched characteristics

M. M. Hasan Mahfuz, Shazzadul Islam, Islam Md. Rafiqul, Mohamed Hadi Habaebi, Nazmus Sakib
TELKOMNIKA (Telecommunication Computing Electronics and Control) , Volume 19, pp 357-363; doi:10.12928/telkomnika.v19i2.18147

Abstract: Recently lower frequency band 4.5−5.5 GHz is proposed by the ASEAN countries for 5G cellular application and therefore, it is essential of designing an ultra-wideband (UWB) antenna for the particular band-notched characteristics. In this article, a compact tuning fork shape ultra-wideband (UWB) patch antenna with a variable band-notched characteristic has been proposed for 5G cellular application. The UWB antenna has been achieved by using a tuning fork shape with a simple partial ground plane. A pair of ring shape slits (RSS) on the ground plane has been added to achieve the band-notched characteristic. The proposed antenna has achieved a large −10 dB bandwidth of 7.8 GHz (2.9−11 GHz) and the VSWR value is less than 2 for the entire bandwidth excepted for notched frequency bands of lower 5G bands (4.5−5.5 GHz). Moreover, the antenna has a peak radiation efficiency of more than 87% for UWB and less than 27% for the notched frequency band. The notched-band is shifted with the change in the position of RSS’s within the vertical axis and thus, the variable band-notched characteristics have been achieved. Besides, the proposed antenna is compact with the dimension of 45×34 mm2 that makes it suitable for the lower band of 5G application.
Keywords: antenna / frequency / UWB / compact / GHz / band notched characteristics

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