The invention relates to a ceiling antenna based on bidirectional
gain. The ceiling antenna comprises a bottom plate, an omnidirectional
radiation oscillator and two reflecting plates. A through hole is formed in the mounting surface of the bottom plate, the omni-directional
radiation oscillator penetrates through the through hole through the bottom and is connected with the core wire, the two reflecting plates are arranged on the side of the mounting surface and define a reflecting area, the omni-directional
radiation oscillator is located in the reflecting area, and when the reflecting plates are arranged in a mirror symmetry mode, the center point of the omni-directional radiation oscillator is coplanar with the symmetry plane of the reflecting plates. The distance between the reflecting plates is in
positive correlation with the distance between the reflecting plates and the first plane in the direction perpendicular to the first plane. According to the design,
signal radiation is effectively concentrated to a long and narrow space by accurately configuring the relationship between the reflecting plate and the omnidirectional radiation oscillator, the problem of insufficient
signal coverage of a traditional antenna in long and narrow environments such as a gallery is solved, bidirectional
gain of the antenna is realized through mirror symmetry and optimal configuration of the reflecting plate, and the
signal coverage uniformity is ensured. And the signal coverage effect is improved.