A Dual-Band Fabry-Perot Cavity Antenna with a Single Partially Reflecting Surface and Reduced Cavity Height for WLAN Applications

Abstract

This paper proposes a dual-band Fabry-Perot Cavity Antenna (FPCA) operating at two important WLAN bands – the 2.4 GHz band and 5.8 GHz band. It exhibits Circular Polarization (CP) at 2.4 GHz and Linear Polarization (LP) at5.8 GHz. The proposed antenna uses only a single Partially Reflecting Surface (PRS) layer to achieve good 3dB gain bandwidths in both the bands. The cavity height of the antenna is also significantly reduced by using an Artificial Magnetic Conductor (AMC) ground plane. The antenna achieves a 3dB axial ratio bandwidth (AR-BW) of 7.9% at 2.4 GHz with peak measured gains of 14.3 dBi and 15.5 dBi at 2.4 GHz and 5.8 GHz respectively. The antenna also exhibits a 3dB gain BW of 7.8% in the first band and 5.5% in the second band.