Dual Band Ultra Slim WLAN Antenna Design for Mobile Devices

A very slim planar shorted monopole antenna design of dimension 34 × 2 × 0.4 (mm) is proposed in this paper. The antenna is consisting of a mirrored C-shape radiator with very narrow gap from the adjacent ground plan. The proposed antenna gives two resonance bands 2.4 GHz and 5.5 GHz for reflection coefficient of -6 dB. This dual band response meets the requirement of WLAN frequency bands. The antenna has measured gain and efficiency ~2.4 dBi at 2.45 GHz and ~3 dBi at 5.5GHz and desirable radiation efficiencies of ~ -3.3 dB to ~ -4.2 dB. The antenna dimension is very much suitable for narrow bezel laptop and tablet design.