Metamaterial Sierpinski Carpet Antenna with Cross-Slot Superstrate For 5G Applications

This paper investigates dual-band Metamaterial (MTM) Sierpinski carpet antenna (SCA) with and without MTM superstrate for 5G applications. The proposed antenna design is based on the second iteration of SCA, and the cross-slot MTM unit-cell is incorporated in the slots of the SCA. The MTM-SCA has been designed on a Rogers TMM4 substrate
$\boldsymbol{(\varepsilon_{r}=4.5, h=}$
1.524mm), and the simulation was done using CST Microwave studio. The simulation results indicate that the proposed antenna operates at 3.5GHz and 5.6GHz with a gain of 4.2dB and 3.6dB, respectively. The overall dimension of the SCA is
$\boldsymbol{25\times 30\text{mm}^{2}}$
, which refers to a size reduction of 45% compared to the conventional microstrip patch antenna (MPA). A
$\boldsymbol{5\times 4}$
cross-slot MTM superstrate was loaded above the MTM-SCA with different spacing to identify and study the gain variation. The MTM superstrate has been kept 3.9mm above the MTM-SCA, which gives an improved gain characteristic of 4.67 dB and 7.4dB at 3.5GHz and 5.6GHz, respectively. The proposed MTM- SCA with and without MTM superstrate shows dual-band characteristics, an excellent size reduction, high-gain and efficiency, and leads to an easy fabrication process, which makes them an excellent candidate for 5G applications.