Compact UWB Antenna for S, C, and X bands Applications

In this paper, a compact antenna with improved gain, reduced dimension, and enhanced bandwidth for Ultra Wide Band (UWB) characteristics has been realized. The microstrip line (ML) is used to feed section of the UWB antenna followed by a semicircular patch. The ground part has inserted the combination of the rectangular and semicircular patch. This ground part gives the enhanced bandwidth and semicircular path gives the improved gain. The proposed antenna is used for radar and satellite communication system. The prototype of the antenna is fabricated and tested with a dimension of 21.6 x 12.6 x 2.54 mm3. The measured results are found to be sufficiently close with the simulation results. It has a gain of 2.625 to 6.4 dBi, impedance bandwidth of 10 GHz with a range of 2.5 to 12.5 GHz and radiation efficiency of 80-87.5 % have achieved over the band.