Antenna device and communication apparatus using the same

摘要

An antenna device comprising: a feeding radiation electrode (3) and a non-feeding radiation electrode (4) separately disposed on a surface of a dielectric substrate (1); a short circuit part (9) of the feeding radiation electrode (3) and a short circuit part (8) of the non-feeding radiation electrode (4) adjacently disposed to each other on one side surface (7) of the dielectric substrate (1); and an open end (17) of the feeding radiation electrode (3) and an open end (20,22) of the non-feeding radiation electrode (4) disposed on mutually different surface sides (14,19) of the dielectric substrate (1) other than the surface (7) on which said short circuit parts (8,9) are disposed.