Dual-frequency planar antenna

摘要

A dual-frequency planar antenna disclosed herein utilizes a main radiating device to produce a resonance mode and excites a parasitic radiating device to produce another resonance mode by the coupling of energy. These two modes can provide sufficiently broad bandwidths, and the present invention is simple in design, which makes it cost effective. Therefore, the planar antenna of the present invention is a competitive alternative for wireless communication applications.