Design and Comparison Study of Circular and Elliptical Microstrip Patch Antennas for 5G Applications

Abstract

In this paper, the designs and performances of coaxial fed circular and elliptical microstrip patch antennas operating at 28 GHz and 38 GHz are investigated using CST and HFSS simulation techniques. The substrates used in the designs are Rogers-RT-5880, RT-Duroid-6002 and FR-4 with a same thickness of (h=0.2 mm). To identify the optimum radiation performance, a comparison for the fundamental parameters of the designed CMSPA and EMSPA are conducted. The numerical results show that although the CMSPA has a smaller patch area, its radiation performance is lower than the EMCPA. Moreover, the RT-Duroid-6002 substrate maintains the optimum radiation characteristics for the designed antennas, at which the EMSPA gain, directivity, S11 and BW values at 28 GHz and 28 GHz are (6.86 dB, 7.37 dB), (7.28 dB, 7.61 dB), (-23.14 dB, -19.23 dB), and (0.749 GHz, 1.300 GHz). While for CMSPA, their values are (6. 41 dB, 6.60 dB), (6.92 dB, 6.90 dB), (-19.11 dB, -12.50 dB), and (0.717 GHz, 1.077 GHz). The performances of the designed antennas are compared with the previously published works, and very good agreements are achieved. Finally, the designation of EMSPA which slightly studied at (38 GHz) shows a suitable antenna parameter reliable for many 5G applications systems.