BROADBAND CIRCUIT AND COMMUNICATION APPARATUS INCLUDING SAME

The present invention relates to a broadband circuit and a communication apparatus including the same. According to one embodiment of the present invention, a broadband circuit interposed between an antenna operating in a first service band and a power feeding unit therefor and allowing the antenna to operate in a second service band which is wider than the first service band, includes: a first line having one end connected to the power feeding unit; a second line having one end connected to one part of a ground surface; a first capacitor interposed between the other end of the first line and the other end of the second line; a third line having one end connected to the other part of the ground surface and being parallel to the first line; a fourth line having one end connected to the antenna and being parallel to the second line; a second capacitor interposed between the first and third lines; a first inductor interposed between the first and third lines and closer to the other ends of the first and third lines than the third capacitor; a fourth capacitor interposed between the second line and the fourth line; and a second inductor interposed between the second and fourth lines and closer to the other ends of the second and fourth lines than the fourth capacitor.