A NOVEL WIDEBAND CIRCULARLY POLARIZED ARRAY ANTENNA FOR WIRELESS MULTI-STANDARDS

Abstract

The paper proposes a novel low-profile wideband circularly polarized array antenna for wireless multi-standards. The circularly polarized array antenna consists of four printed dipole elements, and its feeding network is based on the sequential rotation technique. This proposed antenna operates at the center frequency of 5.8 GHz with a wide bandwidth of 2 GHz (34.4%); a wide axial-ratio 3 dB bandwidth of 1.5 GHz (25.8%); and a high maximum gain of 8.1 dBi. The antenna with a dimension of 50×50 mm² is simulated using CST software. The proposed antenna is suitable for wireless multi-standards such as IEEE 802.11 ac WiFi, WLAN, WiMAX, and the industrial scientific medical (ISM) frequency band.