A High‐Gain Omnidirectional Broadband Antenna

This study develops a two‐element biconical deformed printed dipole omnidirectional antenna comprising a radiating arm, a feed line, and a magnetic ring. The antenna gain is improved by two elements grouped in an array, and at the same time, controlling the feed phase reduces the ground hitting level, effectively suppressing the floor reflection multipath effect. In addition, a magnetic loop is added to the coaxial line for choking, stabilizing the radiation pattern, and achieving good impedance matching. The simulated and measured results demonstrate that the developed antenna achieves 48.2% frequency bandwidth for VSWR ≤ 2, horizontal plane gain ≥ 3 dBi, and unroundness ≤ 3 dB at 1.1–1.8 GHz.