A compact multiband planar antenna for DCS-1900/PCS/UMTS/WCDMA-2000/WLAN and WiMAX applications

A compact multiband planar antenna is proposed for several applications: DCS-1900/PCS/UMTS/WCDMA-2000/GPS, WLAN and WiMAX applications. A previous design was introduced in (2008) [4], which consists of a flared monopole with a sleeve for dual-band applications, it operates in two frequency bands 2.1 and 3.2 GHz covering DCS-1900/PCS/PHS,WCDMA/IMT-2000. This paper introduces a modified antenna consists of a single sided flared-slotted monopole with two “V”-shaped slotted sleeves for multiband applications. The proposed antenna is compact in size with overall dimensions 40mm×35mm. The modified antenna operates in four different bands: 1.58 GHz, 2 GHz, 2.5 GHz and 5 GHz covering DCS-1900/PCS/UMTS/WCDMA-2000/ GPS and 5.2/5.8 GHz WLAN bands and 2.5/3.5/5.5 GHz WiMAX bands. The antenna is fabricated on FR4 substrate with dielectric constant ε_r=4.4 and thickness h=1.5 mm with a Finite Ground CPW (FGCPW) feeding structure. The measured and simulated return loss have a good agreement with each other. The proposed antenna provides nearly omnidirectional radiation characteristics.