Comparative analysis of fractal based nested triangular microstrip antenna

A compact multiband fractal antenna based on the nested geometry is proposed and designed in this paper. The paper depicts the design optimization of the nested geometries for multiband characteristics. The antenna is fed by discrete port. The design is obtained at the center frequency 2.5GHz. Moreover the effect of truncation in nested geometry is observed. The modification in geometry is introduced using DGS structure in the ground plane. The enhancement in the operating bands is observed by above geometry. Operating frequency bands are adjusted by variations in design parameters. Multiband functionality is observed in all the designs presented in this paper. By alterations in the geometry of this antenna various operating frequencies are achieved which are applicable to more than one applications. Gain and Directivity are stabilized to large extent. Improvement in the return loss and VSWR is observed. These antenna designs are thoroughly simulated on FR-4 substrate with loss tangent 0.025 and dielectric constant 4.3 and analyzed using Computer Simulation Technology Microwave Studio. These designs are applicable to L-band and S-band for mobile satellite services, navigation (GPS) and handheld terminals.