Abstract
This paper demonstrates the design of a planar monopole antenna with reduced size and high gain for wireless applications. In this design, a partial ground plane and semi-circular slots are being introduced in the rectangular patch. The proposed antenna is designed on minor cost FR4 glass epoxy substrate having thickness 1.6 mm with resonant frequency 2.5 GHz. Initially, the length of the partial ground plane (GL) and radius of semi-circular slots (R1) are varied with a step size of 0.5 mm and found optimal results at GL = 12 mm and R1 = 9.0 mm. The proposed antenna with a partial ground plane exhibits two resonant frequencies 2.59 GHz and 7.55 GHz with corresponding bandwidth 1061 MHz and 1075 MHz. It also reports the gain of 2.78 dB and 5.43 dB at respective frequencies. Further, the ground plane is modified to enhance the performance of the proposed antenna by employing vertical extension and its width has been varied to obtain the optimal results. At extension width Vex = 2.0 mm, the proposed antenna depicts the maximum gain of 11.91 dB, 6.73 dB and 5.92 dB at the respective frequency bands 1.21 GHz, 6.73 GHz, and 7.11 GHz. It also has been revealed that the frequency of the antenna is being budged towards the lower side from 2.59 GHz to 1.21 GHz; which plays a paramount role in the size reduction of proposed monopole antenna (almost by 78%). The proposed designed structure not only miniaturizes the size of the antenna but also useful for different wireless standards.













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Kaur, N., Sivia, J.S. & Kumar, M. A Design of Planar Monopole Antenna for Wireless Applications. Wireless Pers Commun 125, 2201–2218 (2022). https://doi.org/10.1007/s11277-022-09652-8
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DOI: https://doi.org/10.1007/s11277-022-09652-8