ANTENNA DEVICE AND ELECTRONIC DEVICE

摘要

A square bracket shaped radiation element (21) is formed in a non-ground region (NGZ) of a board (10). A first reactance element (inductor (L1)) that equivalently enters a short-circuited state in a second frequency band (HF band) is connected between a second end of the radiation element (21) and a ground conductor (11). A second reactance element (capacitor (C1)) that equivalently enters a short-circuited state in a first frequency band (UHF band) is connected between a first end of the radiation element (21) and the ground conductor (11). In the UHF band, the radiation element (21) and the ground conductor (11) function as an inverted F antenna that contributes to field emission. In the HF band, a loop formed by the radiation element (21) and the ground conductor (11) functions as a loop antenna that contributes to magnetic field emission.