A BROAD BAND OMNI-DIRECTIONAL ANTENNA

摘要

A broad band omni-directional antenna is provided to minimize a size by forming only an inner portion of a ground member in a curved shape upward and an outside portion thereof in a flat panel shape. A broad band omni-directional antenna(1) includes a sphere-shaped broad band radiation device(30), a ground member(10), and a feed member(20). The ground member is installed on a lower part of the broad band radiation device to be separated from the broad band radiation device and has a cone shape. The feed member supplies power to the broad band radiation device. The ground member has a slant angle of 50 to 85° with respect to a vertical direction.