CIRCUIT FOR MODIFYING FREQUENCY BAND USING HELICAL COIL AND ELECTRONIC DEVICE HAVING THE SAME

摘要

PURPOSE: A frequency band regulating circuit using a helical coil and an electronic device having the same are provided to constitute the frequency band regulating circuit having the helical coil at backend of a general signal antenna and to realize connection between communication ways of different frequency band, thereby simplifying the structure of an antenna and manufacturing process. CONSTITUTION: A second frequency of low frequency band which is lower than a first frequency by regulating a first frequency of high frequency which a helical coil(22-1) is received is outputted. A thin film-type conductive film transfers the first frequency. By responding to a frequency selection signal for connecting between communication methods of other frequency bands, a selector selectively outputs one between a first frequency of the high frequency band and a second frequency of the low frequency band through the helical coil and the thin film-type conductive film.