Wideband planar monopole antenna for S and C band monopulse radar applications

In this paper, a wideband printed monopole antenna for monopulse tracking radar applications is presented. The antenna (15 × 15 × 1.6 mm
³
) has a rectangular patch with symmetrical L shaped strips. The optimum dimensions are determined through parametric study and return loss, effective gain and radiation patterns in the E-H planes of the antenna are measured. The parametric studies on the length of L slots, ground plane and substrate width show that multiband operation is achieved in the upper S (2-4 GHz) and C (4-8 GHz) band frequencies. It is shown that the antenna suitably operates in the frequency ranges of 3.81-3.99 GHz, 4.31-4.49 GHz and 5.69-7.66 GHz. The antenna is designed using FR4 substrate and computer simulation is carried out using HFSS software.