ANTENNA DEVICE AND PORTABLE RADIO COMMUNICATION TERMINAL

摘要

PROBLEM TO BE SOLVED: To improve performance of an antenna device. SOLUTION: The antenna device is provided with a radio circuit 22 transmitting and receiving a high frequency signal, a notch antenna 23 having a feeding part 25, and a notch antenna 24 operated by electromagnetic coupling with the notch antenna 23. The device is constituted of a substrate 21 which is independent of the radio circuit 22 in terms of a high frequency. The notch antenna 23 is composed of a straight notch inλ/4 length from an edge opposite to a position where the radio circuit 22 is disposed in the substrate 21. The notch antenna 24 is composed of a straight notch in length which is slightly shorter thanλ/4 notched in parallel to the notch antenna 23 in a position apart from the notch antenna 23 by a prescribed distance (d)from the edge same as that of the notch antenna 23. The device can be applied to a portable telephone set. COPYRIGHT: (C)2004,JPO