A Deep Analysis of CPW-fed Planar Antennas for Frequencies 2.6 Up to 13.6 GHz

This paper presents a deep analysis of coplanar waveguide (CPW) feed Planar antenna for frequencies from 2.6 GHz up to 13.6 GHz, which covers the authorised Ultra-wideband (UWB) from 3.1-10.6GHz and the X-band from 8-12GHz applications. The Parametric analysis will help the researchers understand antenna parameters' effects on the reflection coefficient (S11) variations. These important parameters are the length of the CPW fed (Cl), the width of the substrate (W), the width of the feed-line (Wf) and the gap between the feed-line and CPW disk (g). The total physical planar antenna dimension is 26 mm × 26mm × 1.6 mm, corresponding to the centre frequency range at 7.5 GHz. The UWB CPW planar antenna is fed via a coplanar waveguide (CPW) to attain the best impedance matching for UWB systems. The presented CPW planar antenna has an impedance UWB bandwidth of 11.0 GHz from 2.6 GHz up to 13.6 GHz at -10 dB return loss. The simulated UWB planar antenna displays an omnidirectional radiation behaviour with a simulated gain of 7.3 dB at 13.6 GHz, a directivity of 7.5 dBi at 13.6 GHz and favourable radiation efficiency of 97%. The presented antenna has the specialised prospect to be used for UWB and X-band systems.