Design of a Reconfigurable Microstrip Antenna

The paper proposes the design of a reconfigurable microstrip antenna. Defected ground structure (DGS) has been developed to improve characteristics of many devices and enhanced bandwidth also DGS is adopted as an emerging technique for improving the various parameters of microwave circuit therefore in this paper, the antenna design of FR-4 with DGS. The designed antenna is expected to work in four modes depending on PIN state. The antenna operates at resonant frequency (2.6, 5.35,5.43,5.45) GHz. In addition, the VSWR value is between (1-1.4) at the resonant frequency with increase of XXX % in the realized gain compares to the antenna without DGS. DGS enhance the gain, bandwidth and improve the characterizes of the microstrip antenna radiation. The bandwidth reached (540MHz) when PIN 1 and PIN 2 is on. This antenna design, simulation, and performance analysis have been conducted using Computer Simulation Technology (CST) software. This paper focuses on using DGS to improve in the bandwidth, gain and return loss to make it suitable for 5G.