A wideband 8‐element omnidirectional array for wireless system

A smart broad‐band planar antenna for wireless system is presented. The simple modeling of this antenna and design method based on equivalent circuits has been developed. An eight‐element planar array has been designed, fabricated and measured. Measured results exhibit good performance of the return loss and horizontal plane radiation pattern. The measured 10‐dB return loss bandwidth of the broad‐band planar array is demonstrated to be 62.5% and the un‐roundness of its horizontal plane pattern is less than 4.5 dB.