Antenna device

Antenna device with the following features: a first electrode (12) of radiation having one end (12a) open and one end (12b) shorted grounded (22) and coupled at a point (16) feeding a line (14) feeding defining line (14) supply and a section of the first electrode radiation loop excitation between the point (16) supply and the end (12b) shorted, a second electrode (24) radiation having one end (24a) open and one end (24b) shorted earthed (22), a section of the second electrode of radiation part of a conductor loop that can flow from an alternating current in the loop excitation and the conductor loop are arranged spatially adjacent to each other such that an alternating current flows through the line (14) feeding into one end (12b) shorted the first electrode (12) radiation induces a current alternating the conductor loop to feed the second electrode (24) of radiation using a magnetic coupling, wherein the second electrode (24) radiation is disposed on a surface (10b) of a substrate (10; 52) which also has a surface (22) of land to which is connected the end (24b) Shorted the second electrode (24) of radiation, a point (28) being further connected coupling the second electrode of radiation via a conduit (26) coupling with the surface (22) of earth, so that the part of the second electrode (24) of radiation is located between the end (24b) shorted and the point (28) coupling the conductor (26) and mating surface (22) define the conductor loop ground through which can flow an alternating current.