ANTENNA DEVICE

摘要

An antenna device comprises a first radiation electrode (12), which has an open-circuit end (12a) and a short-circuit end (12b) that is connected to a ground (22), and which is coupled to a feeding point (16) with a feeder line (14). The antenna device also comprises a second radiation electrode (24), which has an open-circuit end (24a) and a short-circuit end (24b) that is connected to a ground (22). A section of the second radiation electrode (24) is part of an electric circuit. The first radiation electrode (12), the feeder line (14) and the electric circuit are arranged in such a manner that an alternating current flowing through the feeder line (14) to the short-circuit end (12b) of the first radiation electrode (12) induces an alternating current into the electric circuit via a magnetic coupling in order to supply the second radiation electrode (24).