Miniaturized Dual-Band Printed MIMO Antenna with DGS for L-Band and C-Band Wireless Applications

This paper presents a miniaturized dual-band printed MIMO (Multiple Input Multiple Output) antenna with DGS (Defected Ground Structure) for L-band and C-band wireless applications. The proposed MIMO antenna consists of four identical microstrip patch elements printed on flame-retardant fiberglass epoxy (FR-4) substrate with the dimensions of 53mmx60mmx1.6mm and ground plane etched with folded rectangular split ring defected ground structure (FRSRDGS). The dimensions of the individual patch element are 11. 35mmx0.5mm. The FRSRDGS are used to miniaturize the MIMO antenna patch elements. The proposed MIMO antenna resonates at dual resonating frequency points i.e., 1. 9GHz (L-Band) and 5. 9GHz(C-Band) with a bandwidth of 57MHz and 598MHz respectively. The mutual coupling coefficients between the antenna elements are -33dB and -34.5dB, as well as 96.72% of physical size miniaturization and 67.72% of virtual size miniaturization, are achieved. The envelope correlation coefficient (ECC), diversity gain (DG), and radiation patterns are investigated. The simulated and measured results make it suitable to use for L-band and C-band wireless applications.