A triple band integrated ultra-wideband (UWB) antenna is proposed in this paper. This proposed antenna covers UWB frequency spectrum of 3.1 -10.6 GHz as well as other three frequencies bands namely 2 GHz, 11 GHz and 15 GHz for GSM, radar and satellite communication applications respectively. The antenna consists of circular patch, substrate and ground structures. The circular patch is circularly etched on the top surface of substrate with appropriate dimension to achieve UWB spectrum. A thin strip is connected to the rectangular feed line with circular patch. The rectangular ground plane is designed on the back side of antenna with small slots. The proposed antenna is small in dimension and square type. The antenna is designed with the help of FR4 epoxy substrate with relative permittivity of 4.4. The dimension of proposed antenna is 30 mm 30 mm 1.6 mm. A 50 microstrip feed line is used to feed the proposed antenna. The simulated results of the proposed antenna are under the standard parameters from 1.8 GHz -16 GHz frequency bandwidth having return loss < -10 dB and VSWR 2. The return losses are -26 dB, -29 dB and -17 dB at 2 GHz, 11 GHz and 15 GHz respectively. Ansoft high frequency structure simulator (HFSS) tool is used for the designing and analysis of the proposed antenna.
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Seham Ahmed Hashem (2017) studied this question.
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