A novel compact horizontally polarized omni-directional antenna

A novel compact omni-directional antenna with horizontally polarized is proposed in this paper. The proposed antenna has a small size in dimension, and can easily change the operate frequency band from 1.7GHz to 2.4GHz without increase or decrease antenna size. The simple structure has the conceptual configuration of the horizontal loop current on perfect electric conductor plane. The antenna is designed, fabricated and measured, and found to match well with predictions. Measured results exhibit good performance of return loss and non-circularity of horizontal plane radiation pattern.