A compact dual-band frequency selective surface for gain enhancement of a dual-band antenna

Abstract

A compact, single-layered dual-band frequency selective surface (FSS) is proposed in this paper. It is used as a reflector to enhance the gain of a dual-band printed monopole antenna. The antenna operates at 2.4 and 5 GHz WLAN bands. The FSS has two concentric rectangular open loop structures which resonate, respectively, at the designed frequencies. It is angularly stable and polarization independent. By using the FSS as a reflector, the gain of the antenna has been improved by 50%. The proposed FSS and printed antenna have been simulated using full-wave simulator and their prototypes have been fabricated and measured. Good concordance between the simulated and measured results has been obtained.