New design of miniature rectangular patch antenna with DGS for 5G mobile communications

The purpose of this paper is miniaturization of a new form of slot rectangular patch antenna for 5G mobile networks at 3.5GHz frequency. We used a FR4 substrate with a permittivity $\varepsilon {\mathrm {r}}=4.3$ and a thickness ${\mathrm {h}}=1.5 \mathrm{mm}$. The reflection coefficient S11 obtained is -17.22 dB at the frequency 3.5 GHz with 2.7 dB of gain. The DGS technique was used for bandwidth enhancement, we obtained a bandwidth of 449 MHz. The size of the proposed miniature patch antenna is $(20.32 * 15.25 * 1.5) \mathrm{mm}^{3}$. The miniaturization rate obtained is 42%. The simulation results are very satisfactory and the proposed antenna is easy to design and implement in 5G cell phones.