Microstrip X-band Antenna with Improvement in Performance Using DGS

摘要

Simple and new microstrip patch (MSP) antenna for dual operation in X-band using Defective Ground Structure (DGS) is proposed here. DGS structure is used for improving the performance of microstrip patch antenna. By using four rectangular slots in patch we achieved two frequency bands one (9.24-9.68GHz) and other band (11.63-11.87GHz) both are in X-band. And for improving parameter like return loss, bandwidth, gain and directivity of MSP antenna one rectangular slot is cut in ground plane. The proposed antenna is compact in size with dimension 10 × 10 × 1 mm~3 with the ground plane. For designing and fabrication of this structure FR-4 substrate of thickness 1 mm with Dielectric constant 4.9 is used. The parameters of proposed antenna like return loss; Voltage Standing Wave Ratio (VSWR), radiation pattern; gain and directivity are simulated and analyzed using commercial computer simulation technology microwave studio (CST MWS). A good agreement between simulated and measured results is obtained. The designed antenna structure is very simple, compact and occupies less space all these qualities make this antenna suitable for practical applications. The main application of proposed antenna is to make compatible with radiolocation, radio navigation and fixed satellite applications in X-band (8-12GHz).