ANTENNA STRUCTURE AND WIRELESS COMMUNICATION APPARATUS WITH THAT ANTENNA STRUCTURE

摘要

A feed radiation electrode 4 functioning as an antenna is capable of performing radio communication in two different frequency bands, a lower frequency band and a higher frequency band, defined in advance for radio communication. The feed radiation electrode 4 has a loop shape, and a feeding end Q and a feeding-end adjacent portion P are connected with a shortcut path 11, which is provided with a stub 5, therebetween. Thus, the feed radiation electrode 4 is capable of performing radio communication in the lower frequency band for radio communication in accordance with a resonant operation based on a current flowing through a channel I L and performing radio communication time in the higher frequency band for radio communication in accordance with a resonant operation based on currents flowing through channels I H and I H '.