CPW-Fed Circularly Polarized Slot ANTENNA with Elliptical-Shaped Patch for UWB Applications

A new design of coplanar waveguide (CPW)-fed antenna with circular polarization (CP) and excellent impedance matching is presented. In this design a pair of circular-shaped slits is applied to opposite corners of the slot for enhancing the impedance matching and realizes bandwidth of ۱۳۴.۴۳% across ۲.۹۸-۱۵.۲۰ GHz for VSWR≤۲. Furthermore this structure exhibits axial ration bandwidth (ARBW) of ۳۶.۲۲% across ۴.۴۳-۶.۳۹ GHz by embedding two inverted-L shaped ground arms in the slot. The total dimension of the proposed antenna is ۲۵×۲۵×۰.۸ mm۳. This new design has advantages of, supporting the ultra-wideband (UWB) systems and covering the WLAN spectrums with ۳dB CP radiation and VSWR≤۲ simultaneously. The numerical and experimental results of the antenna explain the superiority of the proposed antenna performance with comparison to recent similar works.

کلیدواژه ها:

Slot antenna ، CPW-fed ، ultra-wideband antenna ، circular polarization