A Wideband E Plane Omnidirectional Antenna

A broadband E plane omnidirectional antenna is designed and tested. The antenna measured bandwidth is from 3 GHz to 7 GHz with a VSWR less than 2.2, and from 3 GHz to 5.4 GHz, the variations in the energy level inside its far-field pattern are less than 3 dB. In most of the band, the antenna gain is larger than 0 dBi. All the performance is achieved by using a developed 4 elements T-dipole array.