A Compact Multiband CPW Feed Microstrip Fractal Antenna for X-Band and Ku-Band Satellite Communication Applications

Abstract

The principle idea of this paper is to design a compact multiband antenna using the fractal geometry in three iterations which is fed by coplanar waveguide feeding technique. It is resonating at four different frequencies 12.25 GHz, 13.8 GHz, 15.16 GHz and 18.22 GHz, and the bandwidths obtained for this quad band antenna are 540 MHz, 690 MHz, 440 MHz and 1710 MHz, respectively. In each iteration, the performance assessment of the antenna was carried out regarding return loss, gain, bandwidth and radiation efficiency, and comparison of four structures has been done. The proposed antenna consists of rectangular patch with the dimensions of 20 mm × 13.8 mm, and it was implemented on the substrate FR4 with the size of 27.15 mm × 27.15 mm × 1.6 mm. In order to achieve the multiband operation, reactive loading technique was implemented in each iteration, and hence, antenna’s miniaturization size was also achieved with the proposed antenna design without much more compromising its radiation efficiency. Size reduction, multiband function and radiation efficiency combined realizes a compact and practical antenna used for X band and Ku band Satellite Communication applications.