Compact 3D USB dongle monopole antenna for mobile wireless communication bands

Three-dimensional compact volume internal antenna for universal serial bus (USB) dongle that covers hexa operating bands is proposed in this paper. The volume of the proposed USB dongle is 15x20x4 mm(3); it is based on two connected monopoles, one of them is semi-circular monopole ended by three unit cells of meander-line and the other is a bent monopole with four unit cells of high-impedance wire. The proposed antenna is realized on a printed circuit board to reduce the fabrication costs. The coupling between the antenna elements broadens the operating bandwidth, which includes most of the wireless commercial service bands, GSM850/GSM900/UMTS/GSM1800/GSM1900/WCDMA2100/802.11b/g/LTE2600 (824-2690 MHz) as well as 802.11a/n (5150-5825 MHz). The antenna's simulated and experimental results are in good agreement.