In this article, a coaxial probe fed wideband circularly polarized antenna has been designed and investigated using unequal and adjacent-slided rectangular dielectric resonators radiating in broadside direction (Φ = 0°, θ = 0°). Wi-Fi wireless network use radio signal either in 2.4 or 5 GHz band. Owing to high rush in 2.4 GHz band, the proposed antenna is designed for 5 GHz (5.15-5.825 GHz) WLAN band. The proposed design uses fundamental orthogonal modes TEδ11X and TE1δ1X excited in two individual rectangular dielectric resonators to achieve wide axial-ratio bandwidth (below 3 dB). Measured input reflection coefficient (below −10 dB) and axial ratio bandwidth (below 3 dB) of 26.07% (5.27-6.85 GHz) and 26.85% (5.32-6.97 GHz) has been attained, respectively, in this proposed antenna. The measured far-field patterns such as gain and radiation patterns are showing consistent performance throughout the working band. © 2017 Wiley Periodicals, Inc.