ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a compact antenna device capable of wideband transmission and reception.SOLUTION: An LC parallel circuit 500 is provided between a feeding point 300 and an antenna element L30. The feeding point 300 is coupled with an antenna element L34. Further, an antenna element L32 is provided at the tip of the antenna element L34. An LC series circuit 600 is provided between the coupling point of the antenna element L32 with L34 and the ground. The antenna efficiency of a plurality of antenna elements corresponding to each frequency band included in a communication band of a transmission and reception target is set to compensate the total loss of a propagation loss and antenna efficiency in radio communication within a predetermined range.