3G is a new generation of mobile communication system combining wireless communication and internet. 3G service can transmit sounds and data at the same time and transmission speed is very fast (over several hundred kbps). Nowadays, there are four standards of 3G including CDMA2000, WCDMA, TD-SCDMA and WiMAX. 3G antenna is developed for this mobile communication technology. It is a omni-directional antenna specially designed to receive GSM/CDMA/PCS/DCS/UMTS/WCDMA signals. It consists of PCB, enclosure, connector and cable.