A Multi Band Modified Circular Ring Graphene Patch Antenna For THz Applications

In this article, the modified circular ring antenna is designed for multiband in THz applications. The graphene material is utilized to design a radiating element which is implanted on silicon substrate having the dimensions 80x80x10 mu m(3). To achieve multiband, outer ring, square ring, and inner ring are connected in radiating element which makes simple design of the single element and easy in fabrication. The proposed antenna operates at 1.54THz, 2.33THz, 2.93THz, and 3.49THz frequency bands. The antenna has simulated S11 <-10dB bandwidth of abo-ut 19 %, 15 %, THz, 9 %, and 14 %, THz respectively. The good impedance matching, stable radiation pattern, and average gain of 4.5dBi are analyzed in operating bands which makes antenna suitable for cancer detection, biotin detection, and security applications.