Diagnostic device for diagnosing operating condition of radiant strand of antenna system mounted on car, has determination unit determining current operating state of radiating strand in accordance with energy received by receiving unit

摘要

The device has an energy transport channel e.g. optical fiber (204), including an input connected with an energy transmitting unit (202), and an output connected with an energy receiving unit (203) that receives a portion of the energy transmitted through the optical fiber. A determination unit (201) determines a current operating state of a radiating strand (101) of an antenna in accordance with the portion of the energy received by the receiving unit, where a portion of the optical fiber is mounted in the vicinity of a portion of the radiating strand.