The invention discloses an antenna radiation system and a communication terminal. The antenna radiation system comprises a part region and an antenna clearance region, wherein a gap is formed in a metal region, used as reference ground, in the part region, a switch is arranged at the gap and is used for connecting or disconnecting an original current return path, and a current passes through an edge of the gap so as to extend a reference ground current return path when the original current return path is disconnected by the switch. When the switch is switched off, a reference ground current cannot circulate through the original current return path while circulates along the edge of the gap, the length and the direction of a current return path both are changed, thus, the effective length of the reference ground is increased by combination of the gap switch, the direction of the reference ground current is also changed, and the omnibearing radiation of the antenna can be improved; and apparently, antenna wiring is not needed to be changed in the antenna radiation system, the design difficulty is greatly reduced, the antenna radiation system is free from the limitation of the size ofthe part region, and the flexibility is higher.

Xu Caimao

Papers

Antenna radiation system and communication terminal