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The purpose of this project is to design a single-band, innovative microstrip patch antenna with a rectangular form for use in the C-band radio frequency range and to evaluate its return loss in relation to that of a double-band, circular microstrip patch antenna. There are two teams working on this. Antennas with a rectangular form (the experimental group) and those with a circular patch (group 2) make up the two categories (Control group). The suggested design uses a substrate with a height of 1.6 mm, a material of FR4 Epoxy, a relative permittivity of=4, a base height of 0.035 mm, and a base material of copper. The 80 percent confidence interval is estimated using the G power statistical approach. Simulation The performance of the antenna was analysed and optimised using High frequency Structural Simulator (HFSS) version 15.0 software. With a return loss of -28.2607 dB at 6.5 GHz and -17.35 dB at 15.5 GHz, respectively, the antenna's rectangular form resonates at those radio frequencies. The 1.66 GHz and 2.7 GHz resonances of the circular antenna have a return loss of -24 dB and -16.4 dB, respectively. The developed antenna has a lower return loss than the referenced circular patch antenna. Since 0.01 is smaller than 0.05, the result is statistically significant. The developed antenna has a much lower return loss than the standard circular patch antenna. [ABSTRACT FROM AUTHOR]