WIRELESS DEVICE

摘要

A radio device (100) of the present invention includes a radiation conductor (101) which converts a radio frequency signal into an electric wave and radiates the electric wave; a circuit board (102) electrically connected to the radiation conductor (101) and incorporating an electric circuit for supplying the radio frequency signal to the radiation conductor (101); a planar grounded conductor (103) electrically connected to the electric circuit on the circuit board (102) and placed such that the grounded conductor (103) faces the radiation conductor (101), the grounded conductor (103) constituting a ground of the radiation conductor (101); and a resin-made casing (104) for accommodating the radiation conductor (101), the circuit board (102) and the grounded conductor (103); wherein the grounded conductor (103), the circuit board (102) and the radiation conductor (101) are placed in this order in a thickness direction of the circuit board (102).