Compact differential dual-band slot antenna based on LHMs

A differential dual-band slot antenna is proposed. Dual bands are realized using meander slots in the ground plane. Compared with the conventional half-wavelength antenna, the proposed antenna has a compact size of 60 mm × 60 mm (0.36 λ
1
× 0.36λ
1
, λ
1
is the guided wavelength at f
1
). In order to improve the radiation performance at f
1
, a novel periodic structure of dual-band left-handed materials (LHMs) is presented. The results show that the differential dual-band slot antenna with a LHMs cover can operate at 0.9 GHz and 2.4 GHz bands, and the radiation performance is improved. Also, the differential dual-band slot antenna with LHMs has a wider impedance bandwidth than that of antenna without LHMs.