| 摘要 |
<P>PROBLEM TO BE SOLVED: To miniaturize an antenna device, to simplify a configuration and to facilitate production. <P>SOLUTION: Dipole elements 22a and 22b are arrayed and formed on one side of a dielectric substrate 21, a ground layer 24 is formed at an interval D1 to these elements, the elements 22a and 22b and the ground layer 24 are connected by a linking part 25, and a fine gap 26 communicated with a gap 23 between the elements 22a and 22b is formed in the linking part 25 while being extended towards the ground layer 24. A strip line shaped conductive line 27 is formed on the other side of the substrate 21, this line 27 has first and second linear portions 27a and 27b respectively facing the linking part 25 on both the sides of the fine gap 26 and a folded part 27c for linking these linear portions in the portion facing the elements 22a and 22b, and an electric length λs from a facing point F between the folded part 27 and the gap 23 between the elements 27a and 27b to the top end of the fine gap 26 and an electric length λp to the top end opening point of the first linear portion 27a are made into 1/4 of a first resonance wavelength λ1. <P>COPYRIGHT: (C)2003,JPO |
