A horizontally polarized Omni-directional antenna

Omni-directional antennas are used in small-scale area. As an antenna which has a small diameter, vertically polarized Omni-directional antennas are generally used. On the other hand, in the present when the effectiveness of the polarisation diversity is confirmed, a horizontally polarized Omni-directional antenna with small diameter is reported [1][2][3].