New S / C band Monopole antenna design for satellite application

In This paper, we propose a new broadband monopole antenna design for satellite applications operating at S and C band covering the frequency range from [2.32 to 5.70 GHz ,it can be also used for 4G mobile bands, some WiFi bands, as well as IoT & ISM 2.4 and 5GHz bands especially for video transmission. The monopole antenna is designed with FR-4 substrate overall size of 34 x 40x1.5 mm3, a dielectric constant of 4.3 and loss tangent of 0.025. In study parameter, a new miniaturization technics have been used in the middle of a patch is a rectangular slot to create the broadband resonance at S and C bands, in the next step we used two circular slot symmetry to rectangular slot inserted in the middle of patch to improve the return loss adaptation and to adjust the desired frequencies with optimization of the parameters of slots; The monopole antenna proposed exhibits a good return loss (S11) values of –29.54 dB at 2.7 GHz and −45 dB at 5,1GHz, the best efficiency of 84 %, a good VSWR less than 2, and the positive gain is between 1.8 to 4 dBi on the bandwidth of operation, a best simulations results are obtained and improved with CST software.