WITHDRAWN: Compact multi frequency antenna for Ku band applications

Abstract

The extemporary growth of wireless technology emphasizes the demand for new antenna structures for multiband operations so as to accommodate the increasing multi-service standards in to a single system. Therefore, there is an immense need for the improvement in the performance of the antenna system to support these multifunctional operations. In this paper, a compact multiband antenna for operating at Ku Band frequency range is proposed. The antenna structure consists of a discontinuous square slot truncated at the two corners, engraved over a square patch with suitable dimensions and is placed over the top layer of the substrate. An asymmetrical microstrip line is used to feed the structure and a suitable ground plane is placed at the bottom of the substrate. The antenna design operates over a frequency band of 9.1 GHz and 13.1 GHz and 15.1 GHz with the improved performance of gain and impedance bandwidth. The antenna offers a gain of 4.3dBi with a bandwidth performance of 760 MHz. The proposed antenna is designed on FR4 substrate having a dielectric constant of 4.4 with a height of 1.6 mm. The structure is simulated using a commercially available software Ansys-HFSS and is analyzed. The simulated results are compared against the measured values of the fabricated model and it is observed that they are closely matched. The proposed structure can be used for Ku Band applications such as Radar, VSAT systems for ships and Satellite televisions as they offer lesser values of terrestrial interface.