ANTENNA DEVICE AND COMMUNICATION TERMINAL DEVICE

原文（中国語）

An antenna device and a communication terminal device that offer broader frequency bands or compatibility with a plurality of frequency bands without degrading an antenna characteristic are provided. An antenna device of the includes a first antenna including a loop structure and a second antenna of open type. The first antenna includes a first radiating element, a first coil connected in series to the first radiating element, and a first conductor. The second antenna includes a second radiating element, a second coil connected in series to the second radiating element and magnetically coupled with the first coil, and a second conductor. A feed circuit that transmits and receives a radio frequency signal is connected in series with the first radiating element or the second radiating element. The second radiating element is arranged outside the loop structure of the first antenna.