| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna device capable of easily adjusting additional capacity. <P>SOLUTION: Capacity formation parts 33a-33d for adjusting resonance frequency of an antenna device 1 are disposed on a surface side 3b of a dielectric substrate 3 which is the topmost surface of the antenna device 1. Thereby, even when frequency characteristics of the antenna device 1 are varied by additional capacity variations due to manufacturing variation of dielectric constant of the dielectric substrate 3, the additional capacity can be easily adjusted, and the frequency characteristics of the antenna device 1 can be adjusted to desired frequency characteristics by adjusting opposing areas of the capacity formation parts 33a-33d with respect to a radiation conductor plate 31 by trimming the capacity formation parts 33a-33d. <P>COPYRIGHT: (C)2012,JPO&INPIT |
