ANTENNA STRUCTURE AND WIRELESS COMMUNICATION APPARATUS EQUIPPED WITH IT

摘要

In an antenna structure 1 including a dielectric base member 6 provided in a non-ground region Zp of a circuit board 3 and a feed radiation electrode 7 provided on the dielectric base member 6, an outer side surface of the dielectric base member 6 along an edge of one end of the circuit board 3 defines a side surface 6a near a top side, and a feed electrode 10 is provided in the non-ground region Zp of the circuit board 3 or outside the circuit board 3 such that the feed electrode 10 is disposed along side surfaces of the dielectric base member 6. One end of the feed radiation electrode 7 defines a feed end Q connected to the feed electrode 10, and the other end of the feed radiation electrode 7 defines an open end K. The feed radiation electrode 7 has a configuration in which a current path extending from the feed end Q to the open end K has a loop shape so as to be provided on at least the side surface 6a near the top side and the upper surface 6b of the dielectric base member 6. A feed radiation electrode portion formed on the side surface 6b of the dielectric base member 6 near the top side forms a capacitance between the feed radiation electrode portion and the feed electrode 10 for improving antenna characteristics.