Novel CPW-fed UWB antenna for X-band applications

A very compact coplanar waveguide (CPW)-fed ultra-wide band (UWB) printed antenna (PMA) is presented. The proposed antenna is supposed to cover the UWB range from 7 GHz to 10 GHz, with return loss values below 10 dB in the whole frequency range, for X-band applications, often used for dense satellite communications. The 30 x 35 x 1.6 mm(3) antenna is mounted on a dielectric substrate named FR-4 with thickness h=1.6mm, relative permittivity cr=4.3 and loss tangent of 0.025. All the design and simulated results are performed using CST Microwave Studio, 3D Electromagnetic Simulator software. The results show broad bandwidth and good omnidirectional radiation patterns in the passband, with a very compact size. The satisfactory overall performance with such a simple structure and small size makes the proposed antenna attractive for use in ultra-wide band (UWB) systems, especially for X-band applications.