ANTENNA DEVICE

摘要

It is possible to suppress a change of electric length caused by irregularities of a contact position of a spring connector and reduce irregularities of the impedance matching and resonance frequency. An antenna device (100) includes an antenna element (10) and a printed circuit board (20). The antenna element (10) includes: a base (11) formed from an insulation material substantially in a rectangular shape; a radiation conductor (12) formed on the upper surface of the base (11); and a spring connector (13) connected to the radiation conductor (12). Power supply pads (21, 22) are arranged on the printed circuit board (20). A through hole conductor (24) is formed in the region where the pads (21, 22) are formed. When the antenna is installed, a tip end (13a) of the spring connector (13) is brought into contact with the pads (21, 22) and engaged in the through hole conductor (24). Thus, it is possible to suppress irregularities of the position of the tip end (13a) of the spring connector (13), thereby improving the antenna characteristic.